Logging WL-Proxy-Client-IP and X-Forwarded-For to determine Client IP behind F5
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In order to determine the client IP that sends requests to a Web Server placed behind an F5 appliance, you can attach this iRule to your virtual server. This iRule logs the requested Client IP address under System > Logs > Local Traffic. This iRule logs following Client IP address Request URL X-Forwarded-For ..
How to log locally Using F5 iRule for quick troubleshooting
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There are times that as an F5 administrator, you wanted to log traffic to debug and troubleshoot an request or response that is processed by F5 appliance. Here is handy iRule script that logs following – Client IP address & port – Requested URL – Virtual Server Name specified in F5 – .. Pass Country Code in URL using iRule and Geolocation
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Here is a simple example that explains how to pass Country Code as variable in URL using iRule. I assume that you have already configured your F5 appliance with GeoLocation database, otherwise refer my article BIG-IP LTM url redirection based on Geolocation and set it up. In this example, when someone .. 
iRule to use Data Group
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You might have come across a situation where only limited set of IP address need to be granted access to a web page or web services. And these IP address need updates from time to time when ever you provision the web services to your new clients. Obviously, such IP address list shouldn’t be written .. iRule for single VIP but with multiple pool
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Here I want to redirect our two websites visitors (en.microsoft.com and ph.microsoft.com) to same public IP but to two different pool. If someone types en.microsoft.com, LTM needs to redirect to a specific path /en and specific pool name en_pool If someone types ph.microsoft.com, LTM needs to .. 
BIG-IP LTM url redirection based on Geolocation
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There is no necessity to rewrite about downloading and installing Geo-location database as we have a friendly article written in F5 repository here. You can follow as guided in the article and you should be able to successfully complete setting up Geo-location in your F5 box. [admin@nlb01:Active:In ..