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DevCentral Architecture

Everyone has surely (don’t call me Shirley!) at least been exposed to THE CLOUD by now.  Whether it’s the—I’ll go with interesting—“to the cloud!” commercials or down in the nuts and bolts of hypervisors and programmatic interfaces for... Read more
1 Review

v11.1–Add Signatures or Checksums to iRules via an iApp

iApps, introduced in v11, have a primary function in controlling the object creation and management for an application delivered by BIG-IP. As discussed previously, however, anything that can be accomplished in TMSH can be done in an iApp, so wha... Read more
1 Review

APM Session Invalidation Using ASM

Introduction: Whenever customers expose their internal resources on the Web using VPNs or SSL VPNS there is still some concern over what type of traffic comes through the connection. In order to assist with these concerns we can provide a combine... Read more
Average Rating: 4.9
3 Reviews

Monitor Your iRule Performance with iControl and Google-O-Meter Charts

iRule performance has long been a question our users have asked about.  We get questions all the time about how to determine what impact a specific iRule has on the normal operation of the BIG-IP’s they are running on.  The question is a... Read more
0 Reviews

iControl Development with BIG-IP LTM VE – Part 1

Introduction The LTM VE is a lifesaver when it comes to developing applications that use the iControl interface, or for development of iRules. My main (personal) use of it so far is the development of applications that use the iControl interface... Read more
0 Reviews

New Geolocation Capabilities in v10.1

With the BIG-IP GTM and 3-DNS products, location-based service has existed in the form of topology-based load balancing.  The possibilities grow exponentially in v10.1, as you now have the capabilities in GTM and LTM.  In this tech tip... Read more
2 Reviews

Unbind your LDAP servers with iRules

LDAP is one of the most widely used authentication protocols around today. There are plenty of others, but LDAP is undeniably one of the big ones. It comes as no surprise then that we often hear different questions about using F5 technology with... Read more
2 Reviews

Can iRules fix my cert mismatch errors?

SSL encryption as a means of security on the web isn't a new concept. We've talked about it here on DevCentral many times, and it's as pedestrian a concept as a corndog on the boardwalk to most internet users. We've talked about... Read more
0 Reviews

Selective Client Cert Authentication

SSL encryption on the web is not a new concept to the general population of the internet. Those of us that frequent many websites per week (day, hour, minute, etc.) are quite used to making use of SSL encryption for security purposes. It's an... Read more
1 Review

iControl 101 - #13 - Data Groups

Data Groups can be useful when writing iRules.  A data group is simply a group of related elements, such as a set of IP addresses, URI paths, or document extensions. When used in conjuction with the matchclass or findclass commands, you... Read more
Average Rating: 4.9
5 Reviews

RADIUS Load Balancing with iRules

What is RADIUS? “Remote Authentication Dial In User Service” or RADIUS is a very mature and widely implemented protocol for exchanging ”Triple A” or “Authentication, Authorization and Accounting” information. RADIUS is a relatively simple,... Read more
1 Review

iControl 101 - #09 - iRules

iRules are the internal scripting language of the BIG-IP and can be used to attain full control of traffic flowing through your network.  But, did you know that you can automate the management of iRules across your Virtual Servers with... Read more
Average Rating: 4.9
3 Reviews

Radius Aware Load Balancing via iRules

RADIUS is very popular authentication method that is being widely used in amongst some of the top service providers around the world, not to mention in deployments ranging from enterprise corporate environments to clustered mail systems and back.... Read more
0 Reviews

Offload Authentication with iRules

As the applications being driven by webservers become more and more complex, Applications Developers are always looking for ways to increase efficiency or do away with unneeded processing time. One of the ways that I believe that Applications can... Read more
1 Review