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Entries for March 2011

On occasion I have talked about military force multipliers. These are things like terrain and minefields that can make your force able to do their job much more effectively if utilized correctly. In fact, a study of military history is every bit as much a study of battlefields as it is a study of armies. He who chooses the best terrain generally wins, and he who utilizes tools like minefields effectively often does too. Rommel in the desert often used Wadis to hide his dreaded 88mm guns – that a...
articleus March 31, 2011 by Jeff Browning
While walking past a bookshelf in my office, I caught a glimpse of something shiny. What was that? Well, it was this. The “iRuler v1.0” disk. Not many folks know that the iRule Editor was humorously called the “iRuler” in it’s early days by creator Joe Pruitt. In classic F5 (and Pruitt) form, he showed up one day and said, “hey guys – what do you think of this?”. Suffice it to say that after many enhancements and literally tens of thousands of downloads, it’s a big part of the F5 DevCentral...
For those interested, there’s a great series of videos cropping up as the Interop folks and vendors begin staging infrastructure to support the event (starting 10-May in Las Vegas). The latest takes on the issues with IPv6 and includes a nice cameo by one of our favorite, highly-talented tech stars… BIG-IP! Some good stuff with that helps those not in the know about IPv6 “get learned” in just over 4 minutes. Check it.   Some Related Articles Graphing your F5 LTM Environment with Cacti >...
articlevirtualizationclouduk March 31, 2011 by Nathan Pearce
CHAPTER TWO: RESOURCE ALLOCATION In this second edition of the Dynamic Infrastructure (DI) Series I’m going to examine some very basic forms of Automation. They might seem oversimplified for some of you, but they are important to consider if you’re aiming to get a taste of a DI model without breaking/re-writing too many Change Control Policies. Going head to head with your service delivery manager isn't something I can help you with. The key word is Allocation. We are not Dynamically Provisio...
As we've seen with some of the recent high profile internet attacks, like HBGary, RSA, Google, Comodo and others, no one is immune from being a target and the perpetrators are exceedingly organized, exceptionally skilled and extremely well-funded. Often, the culprits might be better trained than the IT staff deployed to thwart the attacks. The attacks are targeted, elaborate and aggressive, not to mention a bit creative. The attacks are multi-layered in that once one type of attack settles in, a...
What distinguishes these three models of cloud computing are the business and operational goals for which they were implemented and the benefits derived. A brief Twitter conversation recently asked the question how one would distinguish between the three emerging dominant cloud computing models: public, private and enterprise. Interestingly, if you were to take a "public cloud" implementation and transplant it into the enterprise, it is unlikely to deliver the value IT was expecting. Conver...
BIG-IP LTM supports internal and external classes (called Data Groups in the GUI) of address, string, and integer types.  An internal class is stored in the bigip.conf file, whereas external classes are split between the bigip.conf and the file system (the class itself is defined in the bigip.conf file, but the values of the class are stored in the file system in a location of your choice, though /var/class is the location defined for synchronization in the cs.dat file)  Which flavor?&...
articlegermany March 28, 2011 by max
Vertrauen, Verlässlichkeit, gegenseitige Unterstützung und Anerkennung – das alles sind Voraussetzungen für langlebige, lebendige und funktionierende Partnerschaften – im privaten wie im geschäftlichen Leben. Nun möchte ich hier nicht meine Rezepte für zwischenmenschliche Lebensmodelle geben, sondern mich in meiner Person als Senior Regional Director CEE bei F5 auf unser Partnerschaftsmodell mit Wiederverkäufern und Distributoren konzentrieren. Vor gut einem Jahr haben wir unser neues Channel...
Two of our biggest internal contributors, Kirk Bauer and John Alam, are at it again with a handful of perl scripts aimed at easing your migration from some of the “other guys” to BIG-IP.  While they aren’t going to map every nook and cranny of the configurations to a BIG-IP feature, they will get you well along the way, taking out as much of the human error element as possible.  I built a few pages in the Advanced Design & Configuration wiki to host these scripts....
When your data center is constantly under pressure to address operational risks, try leveraging some ancient wisdom from King Leonidas and William Wallace The Battle of Thermopylae is most often remembered for the valiant stand of the "300". In case you aren't familiar, three hundred Spartans (and a supporting cast of city-state nations) held off the much more impressively numbered armies of Prince Xerces for a total of seven days before being annihilated.   A Greek force of approximately 7,000 ...
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