He writes about “the VLAN leaking myth” and how it encourages clients to utilize physically separate network infrastructure in the DMZ’s. Now first things first, I wouldn’t call VLAN leaking a myth. At one time it was a very real and serious vulnerability that was exploited by overflowing the capacity of the switch you were attacking, and causing it to “downgrade” from switch to a hub. Once this happened you now had access to previously protected devices, as well as having the ability to sniff data as it passed through the shared hub backplane.

As he mentions though, this is 8 years ago. Most switches have evolved to the point where backplanes far exceed the traffic that could ever be injected into their switchports. Even beyond backplane enhancements there are many ways to further firm up your security stance – Virtual Device Contexts, not using Layer 3 SVI’s on a DMZ VLAN, utilizing PVLANs, using port security, virtual routing instances, and many more. Of course, there are still many other attack vectors that still remain, but can be mitigated by utilizing features built into the majority of enterprise switches available today.

I think the real question is not “are VLANs safe in a DMZ”. The important question is have you mitigated the probability of compromise (the actual threat) to levels that are acceptable to your business. This question remains whether you have a standalone switch or not. So many times we hear about risk risk and more risk. But risk alone is meaningless in a business context. What is important is combining risk with likelihood. For that I like to use a simple table to come up with the true threat.

For example, as I drive to Fry’s there is the risk of me dying due to a car crash. The impact of me dying is very high (risk) however the likelihood of an accident is low, and furthermore I reduce (mitigate) the latent risk (threat) by wearing my seat belt. So all in all the threat of me dying on my way to Fry’s is pretty darn low.

In a business context this may be that I have public facing web servers and network devices in my DMZ. The impact of them being compromised is that my public image may be tarnished for a short time, and my end users may lose productivity if they are not able to VPN into work, or access the Internet while on premise. I mitigate this risk by using firewalls and both host and network based Intrusion Prevention Systems as well as implementing best security practices on my network and systems devices. The latent risk (threat) remaining is at a level that is acceptable to the business leaders, so the system is allowed.

One question that I have seen coming up more often as we move towards fully virtualized data centers is centered around commingling of virtual infrastructure. There are some hard questions which challenge some practices that we have held true over the years.

• Should you allow sharing of physical memory on a host virtual machine between an internal and DMZ server?
• Should you allow virtual infrastructure from multiple security zones to share a storage array or cluster of arrays?
• Should you allow multiple virtual switches in different security zones commingling on the same ESX or Hyper-V cluster?
• Should you allow virtual firewall and load balancing instances protecting internal and external zones to reside on the same hardware?
• Should you allow virtual routing instances from multiple zones to share a physical infrastructure?

In the past world of standalone systems, the additional cost of providing a wholly separate infrastructure for DMZ environments was relatively low. Each system generally had internal disk, or at most direct attached storage. Network devices themselves were scaled down to support one chassis one function. This fit quite neatly into the Enterprise Composite Network model that was quite common from 1999-2003.

Now, many data centers have moved to the Service Oriented Network Architecture (SONA). In this model the cost of a virtualized data center is primarily focused on foundation elements such as the virtual storage and virtual fabrics, virtualized network, and virtual systems elements. The cost of providing additional virtualized services off these elements is low, however the cost of duplicating the physical infrastructure is quite high on both the capital and operational levels. This is forcing the technical and executive leadership at many companies to take a long hard look at the true threats they are facing in previously physically separate security zones such as DMZ’s, Financial and other secure zones. In the end, they are having to decide whether the threat remaining after their security controls is worth duplicating hundreds of thousands of dollars worth of infrastructure or not.

These are hard questions, with really no single good answer. My gut feel is that over the next few years we will continue the move towards the fully virtualized data center where components such as memory, PCI-X buses, storage and network devices are even further decentralized. This will make the cost of duplicating the infrastructure more and more significant, causing consolidated data center (or compute) fabrics to be the norm. At this point the discussion will move away from securing zones by creating separate infrastructure, to providing end to end security, starting integrated application level security, maybe with TrustSec or a dirivative, all the way down to securing the data at rest on disk. For the time being however, the best we can do is sit down and do an honest appraisel of our security stances, mitigate what we can, and do our best to design data center architectures that provide the flexibility of implementing whatever choice the technical and business leaders agree on.Similar Posts:

• Moving towards a Green Data Center – Truth behind the hype
• Cisco’s Cloud Computing Offering
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--Colin McNamara

Measuring and mitigating risk involved with sharing virtual infrastructure between DMZ and Internal environments

As a CCDE beta participant on the qualification exam, you have given us your time and feedback and have made a significant commitment to making this a valuable program in the market. As a token of our appreciation for your commitment to the success of the program, if you qualify, we are offering the beta of the practical exam to you at a reduced price of $700, a savings of $280 off the retail price of the beta exam along with a priority seat. Cisco will be offering this beta delivery of the exam on October 1, 2008, in Chicago, IL at a Pearson professional testing center. This is an exceptional offer and opportunity to be one of the first individuals in the world to obtain their CCDE certification.

There is a catch here, and hopefully everyone who is participating is able to pull their heads out of current projects soon enough to catch it.

We can’t keep priority seats forever so we’ll need your commitment by August 1, 2008. After August 1, 2008 you will be registering under open enrollment rules and we cannot guarantee your seat.

That’s right, you have 11 days to reply to the email, or forever hold your peace. In my case, them email is already sent. Hopefully I can talk my VP into letting me take that $280 I “saved” him and apply it to a really posh hotel.

–ColinSimilar Posts:

• It’s on like Donkey Kong – CCDE practical registration is open
• Cisco Certified Design Expert – CCDE – officially released by Cisco
• Passed CCDE written and Recertified my CCIE – Killed two birds with one stone
• Protecting the integrity of the CCIE lab – Verbal Interviews being tested
• Cisco’s Cloud Computing Offering
• My experience taking the CCDE Practical Beta

--Colin McNamara

CCDE Practical – Beta candidate deadline August 1 2008

I think Rick (5x CCIE) put it best in a company wide email earlier this afternoon  -

Please join me in congratulating Darrel in obtaining his Storage CCIE. There are only 24 double CCIES (RS/Storage) in the world, so he is probably about 1 of 15 or less in the world to hold all three.

What is everyone’s vote what is next in his career?  And, NO, you don’t have a say, Darrel

A) Service Provider

B) VOICE

C) CCDE

Thanks,

Rick Davis

ePlus, Senior Network Engineer

CCIE – Storage, Voice, Security, Service Provider, Routing and Switching (#5672)

Great job Darrel, everyone is really proud of you. and our apologies in advance to the wife for stealing you for choices A, B or C. (My vote is for C)

–Colin

Similar Posts:

• Updated CCIE numbers
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• Are you a kick ass engineer looking to grow?

--Colin McNamara

Darrel Hinshaw – New Triple CCIE [Storage]!!!!!!!

The CCDE just got VERY real in a big way.The following announcement was posted in the CCDE zone at the Cisco Learning Network. (If you haven’t checked the Cisco Learning Network out yet, I recommend it. Its like NetPro on steriods, but focused around certifications.)

REGISTER NOW for the BETA Practical Exam
Cisco is now registering beta candidates for the CCDE Practical Exam. Cisco has finished development of the second exam needed to attain the CCDE certification, the practical exam, and is now soliciting candidates for the beta delivery.

Cisco will be offering this beta delivery of the exam on October, 1 in Chicago, Illinois at a VUE professional testing center. Only candidates that have a passing score on the CCDE qualification exam may register and participate in this exam. Exam beta pricing is $980US. Register Now by email at:ccdebeta@cisco.com

For my CCIE, it always seemed like a switched turned the moment I put my credit card information in and secured a seat. Before that button was pushed, it was a “future” item to deal with. Once that button was pushed it was a “now” item. Things like going out, having a beer with the guys, video games, etc all got shut down so my focus could burn a hole in the subject matter.

I just sent in my registration email for the CCDE practical. I’ll be in Chicago Oct 1, ready to give it my all. But, the more important lesson I learned from my CCIE was that if you focus your efforts on your lab day, you will fail. However if you focus your efforts consistently over the months before, you have a chance of passing. Now that my registration email has been sent, it is time to turn that focus dial up, lock to the door to my office and earn the CCDE through months of hard work.

See you in Chicago

–Colin

Similar Posts:

• CCDE Practical – Beta candidate deadline August 1 2008
• Passed CCDE written and Recertified my CCIE – Killed two birds with one stone
• Cisco Certified Design Expert – CCDE – officially released by Cisco
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• Cisco Certified Architect – Board examination above the CCIE and CCDE
• Protecting the integrity of the CCIE lab – Verbal Interviews being tested

--Colin McNamara

It’s on like Donkey Kong – CCDE practical registration is open

Luckily we made it to the party without dying, ePlus is safe for the time being. It was nice to have Cisco show appriciation to their biggest chearleaders, and even better to run into your peers and share a drink.

The venue was nice, though I am sure in retrospect that the organizers now now that if you pack hundreds of nerds in a room with video games and beer, there is bound to be a line. The party itself did seem to die out pretty quickly, but I do have to thank the folks at Cisco for taking the time to put the vent together for us.

Next year, Cisco is on its home turf. I think I’ll be the first to put my vote into the suggestion box. My vote is for Conference Room “G” . Where ever it does end up, lets look forward to seeing each other again next year.Similar Posts:

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--Colin McNamara

CCIE Party 2008 Recap – Cisco Live Networkers 2008

This is the first step towards sitting for a practical examination that will hopefully be released this October. And, in response to Micheal Morris’s blog post – Yes Mike, I can pass the CCDE written.

The second big item on my todo list was to recertify my CCIE. Thankfully, Cisco counts the CCDE written towards my recertification requirements. I am waiting for the system to update, but I think this will set me up to be certified till June of 2011.

There is one interesting side effect of passing my CCDE written the week before networkers. I had originally planned on using the free exam at networkers as a “safety” exam in case I struck out on this attempt. Now of course, that is not necessary. Since I am already a CCIE, there isn’t much incentive to take a professional level exam.

So, after weighing my options, I have decided to take the CCIE Service Provider written. It covers much of the MPLS / IP Next Generation Networks material that I have been studying. I only have 7 days to prepare, so the odds are against me. However, with the heavy service provider focus in the CCDE blueprint, I have a feeling after I battle the CCDE practical I will be set to roll right into the CCIE Service Provider lab.Similar Posts:

• It’s on like Donkey Kong – CCDE practical registration is open
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--Colin McNamara

Passed CCDE written and Recertified my CCIE – Killed two birds with one stone

When I work with data center infrastructure I expect the following – clean, remotely manageable, secure devices that runs on the same power and similar cabling, and everything can have a 24x7x4 support contract for hardware replacement. For the most part, you get this when dealing with Cisco, HP, Sun and similar manufacturers.

More often then not (with a few very cool exceptions), when I run into video surveillance infrastructure the video management infrastructure runs on some random third tier manufactured server. It never fails that the video management software is on Windows (normally XP or win2k). I have even seen some systems where the vendor requires you to have a session open to run the software.

And then when you get to the encoders themselves, it never fails. You have two choices.

1. The Uber package that can run a Casino, Identify and track dust mites , and if you point it at space, determine if there is life on mars.
2. Individual dinky encoders that run one or two camera’s each. They have limited encoding choices, limited camera control, no remote management, and normally run on 110 volt system that require different power distribution then the 220 that is common in systems today.

Cisco’s answer to this mess

Cisco has released both a video management solution, as well as a video encoding solution in a network module form factor for the Integrated Services Router (ISR).

The first part of this system, the Video Management and Storage System (VMSS) module fills the following roles -

• Management of multiple video streams from one interface, including IP cameras, 3rd party encoders, and streams from Cisco’s video encoding module
• Streaming of live and archived footage through a web browser interface
• This one is pretty cool – The module can mount external storage via iSCSI. So, in addition to its 160 gig internal drive, you can mount a filer and utilize external storage to scale the system.
• “fast forward” to events, as well as notify security and other personnel through SMS and email

The second part of the system (the module on the left in the picture above) is the Analog Video Gateway Network Module (EV-IPVS-16A). It has a couple functions -

• It can take up to 16 analogue video inputs and encode them with MJPEG or MPEG4 codecs
• You can use the first two ports to output video to a external monitors
• If you are using MPEG4, it can be used as a motion detector (handy for fast forwarding to important events, or triggering alerts)
• It can control pan and tilt cameras. This is good for pointing the camera at the janitor unplugging your servers each night to vacuum
• You can configure analogue contacts as an alarm. This can be bound to a door switch, or even temperature and water level monitors in a remote data center. This one will be very handy.

The third part of this solution is Cisco’s Video Surveillance Operations Manager. It manages, archives, displays and distributes the content that was created and collected on the two previous modules. You would use this if you had many branches to aggregate, or needed to staff a video wall (e.g. casino gaming commission operations). Now, you can run each of these components individually. Buy run together as a whole, Cisco has an enterprise class security solution.

Want to learn more ?

Branch office security page on cisco.com http://www.cisco.com/en/US/products/ps9671/prod_module_series_home.html

Cisco’s product page for the Video Managment Module – http://www.cisco.com/en/US/prod/collateral/modules/ps9671/data_sheet_c78_462225.htmlSimilar Posts:

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--Colin McNamara

Simplifying remote site security with Cisco’s new video surveillance modules on the ISR

Please join me in welcoming John McCool to his new position as the leader of (in my opinion) Cisco’s most strategic business units. Similar Posts:

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--Colin McNamara

John McCool chosen as Jayshree Ullal’s replacement to lead Cisco’s Data Center Switching and Services Group (DSSG)

Please join me in thanking Jayshree for all the positive contributions she has given to Cisco and the industry, and wishing her the best in her future endeavors.

Similar Posts:

• John McCool chosen as Jayshree Ullal’s replacement to lead Cisco’s Data Center Switching and Services Group (DSSG)
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--Colin McNamara

Thanks and farewell to Jayshree Ullal

IOS-XE is takes the best elements out of Internet Operating System (IOS) which has its roots in a closet at Stanford, and combines them with the most successful open source technology ever – Linux. Cisco is leveraging Linux virtualization technologies such as Kernel Based Virtual Machines to protect against operating system failures as well as to allow for In Service Software Upgrades (ISSU).

To really appreciate this, we first have to dive down into the overall architectural changes of the ASR1000. The largest change that Cisco has made was to implement separate forwarding and control planes. In the past, Cisco routers would have the processes responsible for forwarding traffic, and the processes responsible for configuring the router running on the same root operating system. The side effect of this is that if you want to upgrade the root operating system of your router, you are going to have interrupt the traffic flowing through it to do so, or have a physically separate route processor to take over while you rebooted. This is a big headache operationally, and effectively forced engineers to design in separate physical chassis to meet high uptime requirements.

What Cisco has done to address this, was to mirror changes made in their storage and carrier routing portfolios. Both of those product lines utilize the operating system to push commands into advanced processors that exist on the line cards themselves. The ASICS on the line cards are designed to work in a distributed fashion, so that production traffic never goes into up into the router processor (or sup engine). This in effect ensures that the control and forwarding planes can exist as independent elements.

If you look at the graphic above, you will notice 3 main zones. The upper zone is what we would normally describe as the control plane. This is where the higher level functions such as your routing processes, ssh daemons, snmp daemons, and shells live. In short, if you you configure or read something, you are going to do it here. The only time traffic flows through this plane is when you are doing a thing called process switching. keep in mind this is a rare occurrence and usually occurs because of an oversight in your network designs.

By separating the control and forwarding planes, this allows Cisco to basically run a management station on the router, that programs chip sets in the line cards on the fly. This in my opinion is where the true power of this architecture comes through. By separating the two functions the software engineers are free to utilize powerful open source technologies such as Kernel-based Virtual Machines, and the Linux kernel, while letting the integrated circuit engineers design blazing fast chips which allow full functionality at line rate.

What benefits should we receive from a virtualized control plane? First, in larger routing and switching chassis (including the top end of the ASR1000 line) you normally have physically redundant route processors (RP)/ supervisory engines(SUP). The operating systems on these RP’s synchronize many things, including configuration, process state, routing tables, security associations and much more. The primary reason for this, is if you have a failure in the active RP, you can failover to the standby RP without interrupting traffic flows.They also can be used to streamline the software upgrade process by only upgrading one RP at a time, and then gracefully transferring traffic to it. Once proper operation is verified, the backup RP can be brought up to the same code revision.In any production environment this is highly desirable, and helps immensely in the battle for five nines.

The ASR1000 takes the redundant RP concept seen in high end chassis, and allows you to implement redundant upgrades, as well as protection against software failure, with only one physical route processor. This is done by utilizing Linux kernel virtualization. Instead of running the control plane directly on the production hardware, a small kernel is inserted. Booting from that are two copies of IOS-XE. These run independently, and synchronize state and configurations just as if you had two physically separate route processors. What this means in operational English, is that where in the past, you would have to either have two devices, or a larger device with redundant RP’s to upgrade without disruption, you can now have that same ease of maintenance, in a much smaller (and at the end of the day, less total cost) package.

Below this is the forwarding plane.It plugs into to a high speed interconnected fabric which all line cards and RP’s are redundantly connected to. In the diagram above, this is the bottom level. Items in this plane include buffer memory, Cisco Express Forwarding (CEF) ASICS, and now the new QuantumFlow processor. This is normally where you would find your DCEF enabled line cards, fibre channel and Nexus7000 line cards, as well as the modules for the ASR1000 routers. When properly utilized, traffic should be relatively isolated to this tier, and function independently from the control plane.

The shining star of the ASR1000′s forwarding plane is a group of chips that is referred to as QuantumFlow. The QuantumFlow architecture itself merges Cisco’s strength in integrated circuit design, with its strengths in IOS software design. In the past, Cisco would design ASICS’s for specific functions, and then write commands down into them. This has worked very well, until they point that a new feature came out that couldn’t leverage the fixed configuration of an older ASIC. Your choice at that point was generally to process switch for that feature (which is slower, and honestly bad form), or upgrade your cards to the newer ASIC design. The QuantumFlow chipset approaches this problem from a new angle. The first chip in the set (Popeye) is designed to be field programmable in C, as well as no fixed internal pipelines. This combined with utilizing 40 cores running between 900 and 1200 megahertz allows the programmers to utilize parallel processing techniques to utilize an immense amount of processing power in real time.

To put things into perspective, remember when you got your first multi core laptop or desktop. You were able to say watch a DVD, as well as compile code at this same time, while continuing to have a responsive workstation. Now imagine what you could do with a 40 core processor. This is the kind of power that we are talking about. Now imagine, that not only is your workstation immensely powerful, but you could also offload common jobs such as running daily builds, or encoding videos to another machine (or in this case processor.

In the ASR1000 this processor is called Spinach (yellow are in the graphic above). And of course just like the cartoon, Popeye’s potential really comes to light when combined with Spinach. Spinach is a separate chip, that is used a a traffic manager. This chip handles queueing and quality of service, ensuring that the proper packets arrive at the proper time, as well as interconnecting with cryptographic offload engines so it can equally apply services to encrypted flows.

At the end of the day, the most important question is not how fast something is, or how cool it is. The question is what can it do for me? By leveraging this new architecture the ASR1000 is now able to do line rate inspection of traffic using Network Based Application Recognition (NBAR), Support 128,000 queues for deep quality of service, secure and encrypt data using zone based firewalls and embedded crypto engines, segregate traffic using MPLS, integrate advanced voice and video functionality, as well as providing fulling Netflow v9 support for all of the above. It provides all of these services in an always on solution utilizing Linux virtualization, as well as leveraging an flexible chip set architecture that allows for field programmable improvements in the future.

My hope is that after reading this article that you are in a better to understand how Cisco is leveraging open source technology and integrated circuit designs to improve the foundation of the internet. In upcoming articles I will be discussing design scenarios utilizing this features in this product, as well as highlighting other areas where Cisco is embracing both open source technology, as well as open architectures that can properly leverage projects such as Linux, Ntop, Wireshark and more. If this article has you interested in learning more about some of the technologies mentioned today, then I encourage you to check out some of the links below, or shoot me and email to be highlighted in a future readers questions article.

Learn more about Linux Kernel-based Virtual Machines

Learn more about Cisco’s ASR1000

Learn more about Cisco QuantumFlowSimilar Posts:

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--Colin McNamara

Cisco is using Linux virtualization and 40 core CPU’s for its next generation routers

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--Colin McNamara

What do you do for fun?

What useability enhancements do you feel are the most beneficial?

1. A separate, IP enabled, Management Interface. This has been a long time coming. The out of band management interface is very similar to a Ilo card in the HP world. it is effectively a supercharged console server that happens to site on the backplane of the sup engine. I am sure whoever pushed this feature through is going to get flowers one day from a Tech who DIDN’T lock himself out because the management interface was effectively a separate system.
2. Finally, a functionally USB Interface that I can transfer IOS (well, now NX-OS) images through. Everyone has a USB key nowadays, even my Grandmother has one, it will make life so much easier when I can have a 4 gig key with me that has most IOS / NX-OS  versions and my common configs and just pop them right in.
3. The integrated Cabling system is CLEAN. I love that it forces you to reserve the appropriate space for cabling, and that there finally is the possibility to avoid the flying spaghetti train wreck we see so often in Data Centers.
4. Front to back Cooling. The cooling design is well thought out. I liked the fact that it draws from directly above the front floor and exits rear top.. This should help out in raised floor data centers that have a large temperature gradient as you move to the top of the rack. It also negates problem of having multiple 6500 chassis side to side and having warm air blowing from the exhaust of one 6500 to the intake of another 6500.
5. Fan Slots are now placed where it is IMPOSSIBLE to cover with cables. I would say 7 out of 10 times when I walk into a new customers Data Center I find that there are cables run directly over the fan tray with no slack. That is not a failure in design per say, but it could have been avoided. With the Nexus 7000 fan trays in the back the problem is solved before it is created.
6. Power supplies are in the back . FAR away from the data cabling. It never fails that 20 amp circuits get uncomfortably close to copper cabling. By moving the power supplies to the back side of the chassis, this becomes a mute point and we remove any shadow of a doubt about EM interference causing craziness in our cabling.
7. This one sounds really mundane, but a quick heads up grouping of status lights. In the past these were normally in a position where you had to squat down to see them, or they are obscured by cables. Buy putting them on the front of the cable tray assembly it ensures these will always be visible.

What can we focus on now to make it a better platform?

1. One thing that worried me a little was the placement of the compact flash cards in the supervisory module. For those how haven’t it up close look at this picture of the chassis  and look for the Grey cover midway up the sup modules in the center slots. Behind them are two flash cards, one for system partition extension, and one to dump log files into. Having these cards available are great features however I could see an operational process of security rotating out the log partitions, or more likely and engineer pulling the flash card after dumping some data for analysis to it, and then pulling the wrong card by accident. Having a simple strap (like the screw downs for power supply plugs) or something similar would go along way towards mitigating that risk.
2. Continue with the spirit of innovation that has defined Cisco over the years. Cisco has consistently came out with or acquired and integrated many great products that directly address the needs of the market place into the product line (MARS, ASA, AireSpace, TelePresence, MDS, ACE, Etc) but frankly the last GAME CHANGING product that set the industry on its heals and forced everyone to rethink how we utilize technology to accelerate business as a whole was the acquisition of Selsius and the introduction of VOIP as an enterprise class product to the world. I remember having the hair stand up on my arms from the excitement of going up against Avaya and Nortel back then and fighting that uphill battle, educating customers and peers about this “new thing called VOIP and how CallManager (now Unified Communications Manager) is your ticket towards productivity.

   When we talk about the Virtual DataCenter, I/O Virtualization (FCOE) and VFrame Automation it is not just another incremental improvement of existing technology. It is a paradigm shift, a leap ahead, a GAME CHANGER. I get the same chills that I did when VOIP was new because I know that those are technologies that will force us to rethink how we approach computing and data systems. These technologies are to the Data Center what IP telephony was to the PBX, and Cisco is the only company with technologies and engineering know how in all the verticals necessary to pull this off.

Similar Posts:

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--Colin McNamara

Usability features in Cisco’s Nexus 7000

As with any vendor specific event, there is a mix of for public knowledge and for private consumption content, so I generally choose not to talk or write about subjects that may have been covered in the VT unless I can find some public documentation on that subject. So don’t expect to find any juicy pre-release information or gossip here. I don’t want to have the NDA police knocking at my door, and its just not cool to let stuff slip. So, I will generally avoid the subject.

What I can tell you is this – There is a lot of buzz about the Nexus 7000. It is a rocking platform, and we spent the majority of a day going over it. I can’t share much more then I did the night before the VT just yet (will wait till I get lab access to one) but I can share this.

Yes, most people are proud of their shots with Tom Cruise, or Oprah, Richard Stephens or BSD Girl. But I can Top that.. I have a picture of me and the Nexus 7000.

The DC Channels team was nice enough to take us down to the DataCenter and Network Applications (DNA) lab. Where the Nexus 7000 has taken its new throne. They allowed to ooh and ahh and poke and prod it. Weirdly enough, the one thing that struck most was the attention to detail that went into the physical design of this chassis. It is not only good looking, but has some super usability enhancements that really impressed me.Similar Posts:

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--Colin McNamara

Me and the Nexus 7000 last week at the Data Center VT

GoDaddy, one of the nations largest registrars and hosting providers is distributing bloated and possibly insecure code that will cause the average user to more then double their hosting costs. In the pages below you will learn exactly what GoDaddy is doing to your server, how their support staff will try to upsell you, and the steps you need to take to ensure proper operation of your Virtual Dedicated Server.

Background

One of my new years resolutions this year was to consolidate hosting accounts into one virtual server (hosted). I had my domains, and my old hosting with Godaddy already so it was a no brainer to try out one of GoDaddys VDS (Virtual Dedicated Servers).

I went with their 29.99 a month package, with Centos5, unlimited domains, 10Gb disk, and 256 MB of memory. This should be perfectly fine for hosting a couple MySql driven sites, and a couple gallery instances. Let me emphasise this is only handling 4 active domains, two of which only have static HTML.

Provisioning was a breeze, from order to shell account only took 4 hours. I was provided with shell access, pre-configured yum repositories, and this web control panel – simple control panel, or TurboPanel (seems to have two different names). I was able to pop into GoDaddy’s control panel interface with a direct link from their server manager console, and was setting up domains in no time. (Let me throw this caveat out though, don’t buy this product for your mom’s hosting…. the documentation is horrible, and by horrible I mean non-existant).

So I get my server all set up a couple weeks ago, transfer all my files from 2 Cups Solutions and set up my new www.colinmcnamara.com site. Things go just fine, I changed over to wordpress as a CMS and am totally thrilled. My applications and email are working perfectly. Plus, I have a shell account at GoDaddy which is a very handy thing to have as a network engineer. Things are going so well, that I give my buddy Rick a Christmas present and get ricksdavis.com and el-cinco.net for him, and host it on my GoDaddy VDS.I go ahead and purchase the domain through godaddy’s domain manager. This is obviously GoDaddy’s core competency, and goes flawlessly as usual. Next step, I go into the Turbo Panel web interface. Let me give you a little background on TurboPanel. This is the “free” equivalent “to plesk or cpanel. It is actually ok for automating your domain provisioning, though if you are a normal skill level user, I would recommend paying the extra 9.99 a month for Cpanel.

Server Error

I open up my TurboPanel interface and go to provision ricksdavis.com into the domain manager. It comes back with the least descriptive error I have ever received.

Server Error
We are sorry, the system has encountered an error while processing your request.

Home

If you continue to receive this error, please contact your system administrator.

Your URL: /domain/edit.do

Error details:

CommandFailedException: Unable to get min/max uids
at c.g.t.f.systems.user.LinuxUserSubsystem.loadUids:825
at c.g.t.f.systems.user.LinuxUserSubsystem.getMinUid:780
at c.g.t.f.systems.user.LinuxUserSubsystem.loadUserInfo:670
at c.g.t.f.systems.user.LinuxUserSubsystem.getUserInfo:646
at c.g.t.w.actions.domain.ActionDomainEdit.process:84
at c.g.t.w.actions.AbstractSpringAction.execute:118
…
at c.g.t.w.filters.AuthorizedResourceFilter.doFilter:38
…
at c.g.t.w.filters.RequestPopulationFilter.doFilter:117
…

This is the most descriptive error ever right? it tells you what is wrong, has a link to the support system, and gives you actionable information…. I would say a resounding NO. This is a classic example of why friends don’t let friends program in Java. When I got this error last night, I was scratching my head. As an engineer, the first thing I will look at is the last change to the system. Coincidentally I had installed awstats two nights before, and looking at my change logs, I saw that I had upgraded my perl version. So, with no fast response to the support email from GoDaddy I chose to put in a server re provision request (fully automated) and restore from my backups. That process took about an hour, but afterwards I was back online with no errors. Eureka! I found it (I thought). I provisioned Rick’s domain, wordpress, gallery2 etc and then went to bed.

GoDaddy Support Response

Fast forward to this morning, and I finally recieve an email reply from godaddy support. The email is pasted below-

(I have replaced the agents name with John Doe. Tech support is a hard job and I see no reason to highlight him specifically)

Before re-provisioning the server, I went ahead and tried the old three finger salute (reboot) the error still existed. So even if this email would have came to me on time, it would not have helped.

But that is besides the point. lets dig into the solution

The agent suggested the following fix -

Restart tomcat – which I was NOT using for any of my web applications (not an ejb guy)

/etc/init.d/tomcat55 restart

Restart TurboPanel (or simple control panel now – they haven’t updated their init scripts)

/etc/init.d/turbopanel restart

GoDaddy tried to upsell me, instead of fixing their code

He gives the standard, run less stuff on your server speech (remember, I only have 4 domains on this server)

Now here is the kicker – To remedy this issue long-term, you could either setup a server with 512mb RAM, or upgrade to a Dedicated server.

What the heck is with that? I should not need an upgrade with only 4 domains on a server. Especially when in the setup the default Cpanel implies support of 30 domains. Is this Tech Support or a Sales Call?

But, since my server was working fine I don’t pay much attention to the email and move on with my life.

Fast forward an hour, and I am show Rick how to access all the features of his new site, and I figure that I need to change an email account on his domain to forward to his old account. Fine, this should take two minutes. I log onto the TurboPanel interface to put the email forward in.. and there it, a big useless error screen. What the heck is with that?

So this time I actually read the email, and try the fix. Results = nothing. GoDaddy offers shell access so I log in, run top and filter for %memory used. Low and behold, there is only 8142 bytes of memory free, and a Java process owned by root is using 300Mb of virtual memory, and 132Mb of real memory, and Tomcat is using 115Mb of virtual memory and 86Mb of real memory.

Let me translate this into English – Godaddy’s control panel application was using 218 Megabytes of the 256 Megabytes of memory I had purchased. That left me with 34 Megabytes of memory . Let me clarify this, I had paid for a virtual server with 256Mb of ram, up to 1000Mb bursted (which I think is their code for swap). I am only running 4 domains on this server, and two pop3 email servers. This should not be a problem.So what is the cause of the problem? I can sum it up, crappy Java programming. Someone decided to write this program in Java (probably easier to outsource) instead of optimising it to run on lean systems. Their code effectively takes up all the available memory. And on top of that, they are are running a webserver process as root… yes as root. It is like asking for your server to get hacked.

Now, that I am done ranting, let me highlight how to fix this problem.

If you are on Windows use the following procedure to get shell access to your GoDaddy VDS -

• you will want to download a ssh client called putty – Download Here
• Copy this file to your desktop, double click putty.exe , and you should see something like this -

• In the host name field I have www.yourdomain.com . replace yourdomain with your domain name.
• Click on the open button on the bottom right, and a shell should pop up, along with a warning that looks like this (you can click OK to the warning)

• Now skip past the linux section

If you are running Linux or Unix start here -

• Open up a command line terminal
• ssh using your godaddy simple control panel username example -

ssh your-godaddy-control-panel-username@www.yourdomain.com

• If this is your first time connecting to this server, you will be prompted to accept an unkown ssh key into known_hosts, choose yes to accept

Both Windows, Linux and Unix Continue Here –

• Enter your the password you use to access your GoDaddy Simple Control Panel Interface
• You will be presented with what looks like a DOS window, this is called a secure shell terminal. Type in the username you use to access your Godaddy Simple Control Panel and then hit enter

• Now type in the password that you use to access your Simple Control Panel Interface and hit enter

• Congratulations, if you see the window below you are now shelled into your virtual dedicated server.

Change to the Root user

• Now that you are shelled into a Linux device you need to escalate your privileges to get administrator level access. In the Unix world this user is known as Root. You can change to this user, and get full system privileges by using the following command.

su – root

• You will be presented with a password prompt, enter in the same password that you have used to log into your Simple Control Panel Interface
• You are now root, be careful with what command you enter under this user, as you can do some damage if you are careless

Clean out your servers memory

• Most recent Redhat direvatives (including Centos) utilize a tool called yum to add and remove packages. This is also true with your linux servers at GoDaddy.
• you need to install a tool called memhog, it is part of a package called numactl that is normally used to assign specific process’s to specific cpu’s in a multi-core system. We will be using it today to fix GoDaddy’s memory hogging application

yum install numactl

• choose yes to all the prompts, and numactl will automatically be downloaded and installed on your server

Stop GoDaddy Simple Control Panel, and Tomcat, and tell them not to start automatically when your server restarts.

• Tomcat is a special type of webserver for Java based applications. Godaddy uses it to run their control panel interface. 99.99999 percent of users will not need to use Tomcat. If you do need to use Tomcat then you are a technical user and will know what to do.
• In Linux, server applications are called daemons. The are executed by init scripts. We will use these scripts to turn off these server applications
• Turn off the TurboPanel daemon ( this is the process that runs your simple control panel web interface

/etc/init.d/turbopanel stop

• Next we need to turn off Tomcat

/etc/init.d/tomcat55 stop

• Now that we have these services turned off, we need to make sure that they don’t come back when we reboot the server. We can do this by using the chkconfig command.
• Stop the Simple Control Panel Interface from starting automatically by executing the following command

chkconfig turbopanel off

• Stop the Tomcat server from starting automatically by executing the following command

chkconfig tomcat55 off

Clean the mess GoDaddy made of your servers memory

• A couple steps back we installed numactl. The executable we wanted out of this package is memhog. Issue the following command to take your memory back. This command will overwrite 200 megabytes of your memory, allowing the rest of your applications to get access to that memory.

memhog 200m

• This will Clear out the memory that GoDaddy’s application took over, and allow the rest of your daemons to run fine.

Great, my server is running better now. But I want to use my Simple Control Panel Interface. How do I do that?

• Easy, all you need to do is temporarily start the turbopanel daemon. When you are done making changes, you can turn it off again

/etc/init.d/tomcat55 start

/etc/init.d/turbopanel start

• When you are done, don’t forget to turn it off

/etc/init.d/turbopanel stop

/etc/init.d/tomcat55 stop

*** UPDATE *** *** UPDATE ***

I managed to stay with Godaddy and use their Virtual Dedicated Servers for 12 months. However I have moved to a new hosting provider (rimuhosting) in the spring of 2009. My last straw with GoDaddy occurred when I noticed that even with my memory utilization under control my applications were performing poorly. I shelled into verify and found that the virtual disk I/O was severly limited.

Performance issues –

Simple command to determine directory size on GoDaddy VPS

[root@ip-72-167-15-128 home]# time du -hs
1.3G    .
real    0m49.013s
user    0m0.011s
sys    0m0.062s

Simple command to determine directory size on Rimuhosting VPS
[root@colinmcnamara home]# time du -hs
1.3G    .
real    0m0.343s
user    0m0.050s
sys    0m0.290s

Translated into english, it took 49 seconds to execute a simple command on my GoDaddy server, and it too 0.34 seconds (under 1 second) to execute the same command on my virtual server at Rimuhosting.

On top of that, I was paying $32 dollars a month to GoDaddy for a server with 256 megs of ram as well as a FTP backup account. When I created my short list of hosts, I noticed that I was not getting the best deal by staying with GoDaddy.

Pricing at Rimuhosting

• Virtual Dedicated Server 190 Megabytes RAM – $19.95
• Virtual Dedicated Server 400 Megabytes RAM – $29.95
• Virtual Dedicated Server 900 Megabytes RAM – $39.95
• Virtual Dedicated Server 1150+ Megabytes RAM – $49.95

One thing you may notice, is that for the same price as the base GoDaddy VDS ($29.95) you get 400 Megabytes of RAM instead of 256. (and they won’t put on a memory sucking turbopanel app) On top of that, things that I had to pay extra for at GoDaddy such as backup space, backup mail relays, and DNS service came bundled for free.

I made the choice to move to Rimuhosting, and the service has been superior to GoDaddy in every single way. If you get sick of GoDaddy like I did, you might want to check Rimuhosting out, I think you’ll like them.Similar Posts:

• What should I do this thanksgiving break?
• Zone based IOS firewalls
• Routers can email you when they go down
• New features in VMware 3.1
• Cisco NX-OS 4.0 | Next Generation Internet Operating System
• Identity aware networking using Cisco TrustSec

--Colin McNamara

Why GoDaddy Linux Virtual Dedicated Hosting Sucks & How to Fix It

Highlights of the the Nexus 7000′s features are -

• 15 Terrabit per second backplane
• Support for 40 and 100 gig ports in the future
• Seperate control and data planes
• link layer encryption
• front to back airflow (FINALLY available in a non NEBS chassis)
• Lossless non blocking fabric (VOQ enabled)
• Fibre Channel, Infinaband, and Ethernet blades in one unified platform
• Cisco Data Center Network Manager (MDS Fabric Manager on steroids)
• Virtual Device Contexts (Network Systems virtualization, the next level past VRF route tags)

You can learn more about this switch in upcoming articles, and at http://www.cisco.com/en/US/products/ps9402/index.htmlSimilar Posts:

• Cisco Nexus 4000 Blade Switch
• Nexus 5020 – Consolidated 10 Gig Ethernet and 4 Gig Fibre Channel
• Simplifying your Data Center with Cisco’s Nexus 2000 Fabric Extender (FEX)
• Interesting TechWise TV episode on virtualization
• Humor inside the Nexus 5000 switch fabric architecture
• Cisco releases Nexus 1000V virtual switch for VMware

--Colin McNamara

Cisco Nexus 7000 DataCenter switch released – Welcome to DataCenter 3.0

According to surveys, 57 percent of Americans shower every day.

Hugh Hefner has a species of rabbit, the Sylvilagus palustris hefneri, named after him.

The bull’s-eye on a dartboard should be exactly 5 feet, 8 inches off the ground.

Teenagers are 50 percent more susceptible to colds than people over 50.

Sir Isaac Newton died a virgin.

Studies have shown that the larger a man’s testicles, the more likely it is he’ll cheat on his mate.

The consumption of beer in a lavatory is forbidden in Manitoba, Canada.

Elevators and escalators kill about 30 people, and injure about 17,000, each year in the United States.

Mother Teresa’s real name was Agnes Gonxha Bojaxhiu.

In ancient Rome it was considered a sin to eat the flesh of a woodpecker.

Typically, sex between snakes lasts between six and 12 hours.

“Symphorophilia” is sexual arousal derived from arranging a disaster, crash or explosion.

The average American worker uses 11 Post-It notes a day.

There are five cities named Las Vegas in the United States. There are two in Puerto Rico.

The oldest existing governing body is in Althing, Iceland. It was established in 930 A.D.

The band Creedence Clearwater Revival was originally named The Blue Velvets.

Men are twice as likely to contract leprosy as women. Similar Posts:

• Christmas Trivia
• Updated CCIE numbers
• What does it take to pass the CCIE exam?
• Dragged to the hospital
• Cisco NX-OS 4.0 | Next Generation Internet Operating System
• How to succede in 2007 – By Tim O’Reilly

--Colin McNamara

A little trivia to start the week

read more | digg story
Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

• San Diego WildFIre Update
• Study on Perspective – Set 1
• Taking a closer look
• Tour of Ashley’s new site !
• Why can’t I post from docs.google.com to blogger beta?
• Gall stones update – Kaiser sucks

--Colin McNamara

San Diego Maternity Photographer

On the fire maps of the San Diego Witch fire, we are pretty much under the big red spot (directly under lake hodges, to the west of the 15). We moved to 4s ranch in June , on the intersection of rancho bernardo and ralphs ranch road. (pretty much right under the big red spot). We left on on monday at around 10 am with fire on 3 sides of our community.We got out with a couple changes of clothes, important documents, and the kids. Almost everything else is replaceable.

the fire directly upwind of us, coming up the ridge -

Getting out of 4s ranch was crazy though, traffic was jammed up through camino del sur, and the police were not helping. We ended up sneaking out through a backroad and coming out through Del Mar. Our final destination (and temporary home base) is the Ramada plaza hotel in Anaheim.

The winds were blowing 60 mph +

While it is rough having to flee from our home, we are much more fortunate then those people stuck at Qualcom, or Del Mar, etc. While they have been sleeping on the cold cement for two days my family has enjoyed two queen size beds + a fold out couch. Kylie is a little shell shocked, I think fleeing from her home was a bit much, while Chris is just being a normal little two year old terror.

Fireman going after the fire where it wrapped around our neighborhood -

We have also been very fortunate to have many supportive friends. I thank everyone of them for all the support and help they have given. It makes things much easier when you know that you aren’t alone in this struggle. We have a couple standing offers of homes to stay in, a home cooked meal (from the best mexican food cook I have ever met) waiting for us tonight, clothes / diapers for Chris, pretty much everything we could have wanted.

The view as we were leaving (sorry about the blur, we were in the truck)

During this whole ordeal I there have of course been challenges, but I am amazed how everyone is pulling together. In the hour before the police forced the evacuation neighbors were helping each other with information, people were grabbing hopping in trucks and running to help with the fire lines. While it was a post apocalyptic scene with the choking smoke, ash everyone, and blood red sun, people were helping each other. It is to see the best of people when they are under the worst conditions.

The blood red Sun

The two big questions every day are – Is my home still there ? and If it is there, when can I go back? As of right now the evacuation order still stands for my neighborhood. It is directly downwind (about 1 kilometer) from the homes in Rancho Bernardo they have been showing on the news. When we left, fire was coming up the Ridge that separates our neighborhoods. On signonsandiego.com ‘s firemap it looks like we may have been spared, but we are still in the middle and downwind of the major fire. The only thing that will signal a change an all clear is for the santa anna winds to subside.

neighbor checking taking pictures of the fire prior to the evacuation order

One thing that is important in any emergency is to go through a lessons learned.

The things that worked well were -

1. Having a 4×4, it allowed us to choose creative escape routes, and avoid the possibility of getting stuck in traffic with the fire behind us.

2. Having decent non-perishable snacks (granola, raisins, etc)

3. Having lots of water bottles laying around – dehydration is a big issue with the dry air.

4. having travel kits ready – because I travel a bit, I normally have my carry-on bags prepped.

5. Bringing a toy, and a little video player for Chris – this saved lots of heartache for everyone

Things that I could have done better -

1. Inspected my wife, daughters, and sons bags before we left – they didn’t pack enough clothes, my daughter forgot things like underwear, socks, etc.

2. Had the key to the breachlock on my shotgun handy – i couldn’t find the key to unlock my weapon. If this would have devolved to Katrina standards then this would have been essential. In retrospect I would have done better with a semi-auto handgun. It is easier to transport and conceal while traveling.

3. I should have had better radios. I am a ham operator, have my license. But I have always used peoples base stations tethered through the Internet (basically a big ip based microphone / speaker connected to their transceiver. Ham operators are a godsend in situations like this, and having a mobile unit in my truck would have added valuable information in a time when we had none.

Colin McNamara
CCIE #18233

Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

• San Diego WildFIre Update
• How close did the fire come?
• How to succede in 2007 – By Tim O’Reilly
• Happy Birthday Marines!!
• The emergence of MDS features in Cisco’s datacenter networking equipment
• Interesting thoughts from Mark Cuban

--Colin McNamara

Witch fire in San Diego – Notes from an evacuee

My background is all over the place. It goes from running a small ISP when I was 18 to managing international CallManager clusters, to enterprise data center design and migrations. I swear that I have tech ADD. I see something new and I am like.. oooooh shiny, lets do a sniff and see how it works.

I actually attempted the Route Switch lab twice in 2002 (still had token ring and dlsw still) but got activated for the war before I could get my number. I can tell you.. that sucked horribly.

So, why did I choose to get my Storage CCIE first instead of finishing up my Route Switch first? Well, over the past couple years I have done a significant amount of IP storage (NFS, ISCSI, ATA over Ethernet, etc) including building my own IP storage heads based on linux. I had also done a little bit of fiber channel work. I felt that I had a significant advantage compared to most network engineers in the storage networking space. And, I think more importantly, the topics that I had to study were new and fresh. Whereas when I cracked open my Route Switch books.. I honestly wasn’t to excited about it at the time ( I think I was holding a grudge from my first attempts in 2002).

The partner e-learning central portion of Cisco has an Excellent lab access to labgear.net. It gives you 2 hour segments of time with 2 mds’s (both with IPS blades), 1 2 port jbod, and 2 2 port servers. They also have introductory tutorials for most major technology segments.

I did all of those, along with the every E-learning class that was on PEC. I think the major ones were the Design, Support, and CASSI classes.I took that, sat for the design and support specialist exams, and took my written last December.

After doing all that work, I was honestly 70% there. I took a little break for january and febuary (There was no open lab dates) and then started hitting the labs I think at the end of febuary.

For the majority of my practice I used the labs available through PEC. I also was able to weasel my way into 8 hour sessions every sunday from our channel SE. (I owe him plenty of drinks at networkers this year) For those 8 hour sessions I had labs created to summarize the major technology areas and to be as evil as possible to myself.

I had one attempt which didn’t work out as well as I would have liked. In RTP the lab starts at 7:15. This means if you are from the west coast like I am you will be getting up at 3:00 am in the morning for your lab. That royally kicked my but. I diverted from my attack plan and ended up
running out of time. It was a classic example of letting the lab run you, instead of you running the lab.

Luckily a data opened up just over a month later. I spent that time just working on my speed (speed is the secret sauce). I migrated to using Fabric Manager (gui interface) instead of command line. After 2 practice runs my time had dropped 25%. I also flew out to RTP 3 days before, and made sure to relax and get on east coast time.

For my final prep I got access to iementor’s lab. Their lab is excellent. I cannot reinforce enough how much it contributed to my confidence in that final week. Roman was really cool about working with an existing candidate to get me squeezed in. They are really cool guys, and they have the only workbook on the market right now.

So, I used their lab 2 days before mine, and then just chilled the day before. The day of the lab I had 70 points by lunch, and had completed configuration of the lab by 12:30. I spent the rest of the day reviewing my configurations (found 2 errors), fixing one bug, and generally harassing the proctor to make sure I didn’t misinterpret anything.

So.. if I had it all to do over again what would I do. I would still do the PEC stuff, and continue to primarily live in the Doc CD. Though I would probably pony up the cash and buy the iementor book and more lab time with them.

Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233
“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

• What does it take to pass the CCIE exam?
• Fibre Channel over Ethernet is taking off
• And it begins again – On the road to my CCIE in Storage
• Are you a kick ass engineer looking to grow?
• My CCIE Storage Shopping List
• Where was Colin in 2010?

--Colin McNamara

Why was Storage Networking my first CCIE? And What did I do to prepare?

Security Threat Mitigation and Response: Understanding Cisco Security MARS
by Dale Tesch, Greg Abelar
Publisher: Cisco Press
Pub Date: September 28, 2006
Print ISBN-10: 1-58705-260-1
Print ISBN-13: 978-1-58705-260-6
Pages: 408

This book had so much potential to be a great. Sadly it turned out to be an overgrown technical manual. The author does try to lighten things up by interspersing real world technical details throughout the book, however he could have just written a “hacks” style book with that material and been much better off.

This book is organized into four major divisions. The first, Security threat identification and response challenge reviews basic security theory and response. A network engineer breaking into security may find this interesting. Anyone else can just skip over this chapter.

I actually found the second, CS-MARS theory and operation to be the most useful. The author laid out a pretty good flowchart of the designing process used to process alerts. He also hinted out the back end architecture supporting the device.

The third section, CS-MARS operation was just blatantly lifted from the users guide. The only difference is that the online users guide is organized a little more clearly. I recommend skipping this chapter and going straight to the on-line documentation, you will be much happier.

The fourth section, CS-MARS in action had great potential, however the author just stuck in some really salesy usage scenarios. I can’t reinforce this enough – This needs to be updated. I have been to customer talks where users presented how the MARS box has made their life easier in many ways. The stories presented here do a disservice to the product, and do not highlight the core differentiators that this product offers.

Would I recommend this book? Yes and No. I would recommend that entry level engineers with no security experience, and business users pick this up. Other then that, log onto CCO and just read through the docs. You will learn more in less time. And as a plus, you will have $50 sitting in your wallet still.

Colin McNamara
Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”

Similar Posts:

• RSS feeds – an intranet aggregation solution?
• Measuring and mitigating risk involved with sharing virtual infrastructure between DMZ and Internal environments
• Simplifying remote site security with Cisco’s new video surveillance modules on the ISR
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• Cool new features in 12.4(15)T
• Altor Virtual Network Security Analyzer (VNSA) integrated with Cisco’s Nexus 1000v for VMware

--Colin McNamara

Book Review – Security Threat Mitigation and Response: Understanding Cisco Security MARS

We had it designed by Bludomain.com. At first I was a little reticent about using them, but now I am very happy about the move. The interface for maintaining gallery’s is superior to how I was doing them before. In the past Ashley would bug me to update her pictures, and I would bug her to provide them in for proper format. Now she just logs onto a web interface and uploads her pictures, updates her content, and whaam.. the site is updated. All this happens without one honey do this. I say that is worth its price in gold

Once I saw this “seamless” interface I had to figure out how they are doing it. After a little pocking around their source code I found out that they were using PHP to pull information out of a MySQL database, and use that for dynamic content insertion into a flash template. From what I can tell, the first thing that happens is the base flash template loads. Each button shape is hard coded in flash, and an actionscript is bound to each button.
This actionscript runs a PHP web application that logs into a local MySQL database, selects from a table, creates an array, then runs a for loop to populate each submenu for items in each drop down.

The net net of this is that you can have a few default templates, and just populate unique configuration options a MySQL db. This simplifies the whole content management issue while still providing the Content Protection that flash gives you.

–Colin McNamara
Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

• I found a great tutorial on PHP + MySQL+Flash integration
• Tour of Ashley’s new site !
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• Ashley stole my new Lense…

--Colin McNamara

PHP / MySQL / FLASH website integration

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

• Study on Perspective – Set 1
• Why can’t I post from docs.google.com to blogger beta?
• Gall stones update – Kaiser sucks
• Great TCL and EEM preso found on IOS hints and tricks -
• Sun Project Backbox
• Happy Birthday Marines!!

--Colin McNamara

Taking a closer look

Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

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--Colin McNamara

Study on Perspective – Set 1

About three weeks ago I had a some major pain in the upper right side of my abdomen, right under the rib cage. It hurt so bad, that I made sure the phone was near.. Just in case the ambulance needed to be called. This was followed by a noticeable swelling in the affected area.

Ever since then the discomfort has been pretty steady. This results in me getting up and pacing about ever 40 minutes or so. Needless to say, this is rather inconvenient, and tends to interrupt my day.

Fast forward to last Friday. Ashley and I were at a pregnancy checkup when the doctor was going through her list of questions. One of the questions involved the doctor pointing at Ashley’s gall bladder. A light went on in my head, and quickly the pain I was having had a culprit. The first thing I did when I got home was to get on google, and do some research. I had about 95 percent of the symptoms of gall bladder stones.

On Saturday Ashley made me go to the hospital. The doctor confirmed our research, and scheduled a sonogram to check for gall stones. So this pretty much ruined my Saturday. Although the doc did give me some pain relievers, which makes things a bit better.

Sunday was spent researching gall bladder disease. I have learned pretty much all the gory details, and will give you a 10 cent summary. The gall bladder is a muscle surrounded sack that collects bile from the liver.
This “bile” also known as “gall” contains additional enzymes and salts to break down fat. The gall bladder concentrates the key elements in bile until they reach between four and eight times the amount per volume that exited the liver. Sometimes in certain people that concentration process goes a bit overboard. This can cause the salts and other elements to form into stones.

These stone pool up at the bottom of the Gall bladder like waiting time bombs. When you eat a fatty meal, the Gall bladder receives a signal to dump its contents into the bile duct, which empties into the small intestine.

Sometimes if there are stones present they can become lodged into the bile ducts when the Gall bladder is emptied. This can cause pain under the rib cage, back pain, cold sweats, and nausea. The worst thing is, that once you start having Gall stones, you are pretty much prone to get them again.

It seems the most popular solution to Gall stones is the removal of the Gall bladder. Now I try to pretend I am a rough tough man, but surgery scares the living daylights out of me. However, pain for the rest of my life isn’t high on my list either. Considering both sides, I think surgery is going to win.

There are 2 types of Gall bladder removal surgery. The first involves cutting up the abdomen and ripping the problem child out. This method involves up to 6 weeks of recovery. I am not especially thrilled with this. Luckily there is a laproscopic surgery. This has a 2 day required stay, along with a week recovery time. The surgery involves cutting a few 1/2 inch incisions. ASmall tools are inserted into the abdomen, one blows up the abdominal cavity with carbon dioxide, while the others cut the bile duct, and bring the Gall bladder opening to the outside of the body. The Gall bladder is then emptied through that opening. Once empty the deflated bladder is then pulled out of the body. The hole left in the bile duct is then sewn up, the abdominal cavity deflated, and the access holes sewn shut.

I am really hoping that I will get the 2nd surgery. I am a big fan of the shorter recovery time. And since both require that I get knocked out, the risk is the same. The one thing that gets me the most, is that that I am going to have to go on a special diet for the rest of my life.

I will actually have to eat healthy. Holy crap… actually eat healthy.. I don’t know what I am going to do. The bile in the Gall bladder is a key player in the process of digesting fats. So I will basically be without a large majority of the tools needed to process fat. I am guessing this will equal emergency shits after a fatty meal. Now that I have to choose between diarea and healthy food, with much diliberation I choose to eat a low fat diet. With that being said, the even harder thing is that Ashley is going to have to live on that same diet. And she cant eat healthy to save her life.. or mine.

I’ll keep you updated,
–Colin McNamara

Copyright ©2008 | Colin McNamara | CCIE 18233 | All Rights Reserved”

Colin McNamara
CCIE #18233

http://www.2cups.com

“The difficult we do immediately, the impossible just takes a little longer.”Similar Posts:

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--Colin McNamara

Dragged to the hospital