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

Forum Discussion

dyonadi_313056's avatar
dyonadi_313056
Icon for Nimbostratus rankNimbostratus
Feb 25, 2019

DNS answer based on specifiv domain

Hi! I have a VS and its pool's member is a cache DNS farm. I need to get an iRule that answers a "custom" IP for a specific DNS query based on the domain name and let non matching queries pass throug...
big-ip
devops
LTM
PeteWhite's avatar
PeteWhite
Icon for Employee rankEmployee
Feb 25, 2019

You are very much along the right lines there. Have a go with this and see how you get on:

when DNS_REQUEST { 
    if { [DNS::question name] ends_with "example.com.ar" } {
        DNS::answer clear
        DNS::answer insert [DNS::rr "host.domain.com" A IN 50 "1.2.3.4"]
        DNS::header aa 1   
        DNS::return
    }
}