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articlenewstechtip December 11, 2012 by Colin Walker
What is DevCentral? DevCentral is F5’s online user community. It is a collection of technical individuals all looking to learn about, share information about, use and/or explore F5 technology in some fashion or another. DevCentral, as the name implies, specializes in the more development centered technologies, often referred to as F5’s “extension technologies”. This includes things such as iRules, iControl, iApps and TMSH. But don’t let the name fool you, there is ...
articleirulesbig-ipdevnewstechtip December 11, 2012 by Colin Walker
F5 is the creator of and home to many different, powerful technologies. We offer some of the most powerful, advanced application delivery technology in the world. As with any advanced technology, however, there are often times terms and names flying around in documentation, publications or online communities that aren’t necessarily part of your daily speech. Until you’re a bit “in the know” some of these things can be confusing or even daunting. As such, we’ve gone ...
Introduction The iRules 101 series has existed on DevCentral for years, and has long been one of the more popular sets of articles that we have had on the site. As such, we have been hesitant to do anything to “rock the boat”, as it were. However, given that that series is now several years old, and the technology driving iRules and in fact F5 gear in general has evolved greatly in that time, we’re now re-visiting this series to get new and experienced iRules users on track from the basics all ...
Background EAVs (External Application Verification) monitors are one of most useful and extensible features of the BIG-IP product line. They give the end user the ability to utilize the underlying Linux operating system to perform complex and thorough service checks. Given a service that does not have a monitor provided, a lot of users will assign the closest related monitor and consider the solution complete. There are more than a few cases where a TCP or UDP monitor will mark a service &ldquo...
Sometimes I need to log information from iRules to debug something. So I add a simple log statement, like this: when HTTP_REQUEST {   if { [HTTP::uri] equals "/secure" } {     log local0. "[IP::remote_addr] attempted to access /secure"   } } This is fine, but it clutters up the /var/log/ltm log file. Ideally I want to log this information into a separate log file. To accomplish this, I first change the log statement to incorporate a custom str...
Having LTM-VE is nice, but setting things up so that you can actually use it for something is a different matter. There is a lot of information floating around out there about configuration ranging from Joe's Tech Tip to Lori's Architecture Reference to deployment guides. This article focuses on setting up a VMWare team that includes your BIG-IP and some test servers. Since I wanted this to be something you can re-create, all of the servers utilized in this Tech Tip are clones of a straight-for...
Introduction So, you've probably read all about the BIG-IP LTM VE.  You've gone through the download process and got the thing configured and running in VMWare.  You've even gone through the initial configuration steps to get the management port configured and got the thing licensed up.  Now what?  Well, we've got a bunch of examples of firing up separate VM instances of host operating systems so that you can test creating pools of servers with those other VM instances. ...
articlevirtualizationdevnewstechtip February 17, 2010 by Colin Walker
The already impressive flexibility and power of the BIG-IP takes a giant leap forward with the announcement of the BIG-IP LTM VE. This Virtual Edition of LTM not only allows for extremely easy trial of the technology and an easily attainable resource for local development or testing, but it also shows that no matter how many tricks LTM might have, there's likely one more around the corner. If you're like me then you're already an F5 user. I use F5 gear just about every day while wri...
articlebig-ipisvnewstechtip January 15, 2010 by Joe Pruitt
In the latest release of the iRule Editor v 0.10.1, I added several new features.  This tutorial will walk through the Offline Editing features I've added that allow you to write your iRules when not connected to the BIG-IP.  It will also show you how to take your online iRules and move them offline in preparation for a long plane flight or time without network connectivity.    
articleirulesbig-ipisvdevnewstechtip January 14, 2010 by Joe Pruitt
SyntaxHighlighter.all();In the latest release of the iRule Editor v 0.10.1, I added several new features.  This tutorial will walk through the Auto Connection features I've added that allow you to supply command line arguments to have the iRule editor automatically connect to your specified BIG-IP. Usage: iRuler.exe [args] args ----------- /h hostname - the hostname (or ip) of your BIG-IP /u username - the admin username /p password - the admin password The following v...
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