Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

iRules Recipe 3: Pool and SNAT Selection by Host Header Value

The Problem You manage a number of web sites, and they are spread across servers in several different pools. You want to use a single public IP for all of these, so you need to make a pool selecti...
Updated Jun 05, 2023
Version 2.0
application delivery
big-ip
irules
VernonWells's avatar
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I am an F5 Solutions Architect for Service Providers in the Americas, focusing on Virtualization, SP protocols (Diameter, GTP, DNS) and programmability. Prior to joining F5, I worked as a Wi-Fi Network Engineer for a large U.S. public University, as an Operations Engineer, a network management Software Engineer, and as a Technical Trainer.
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nov1ce_120072
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Oct 24, 2018

Thank you! And to extend it - how to perform http to https redirection at the same time? We do this with the following iRule attached to the VIP:

when HTTP_REQUEST {
    HTTP::redirect https://[getfield [HTTP::host] ":" 1][HTTP::uri]
}

Do we need to keep it as a second iRule?