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

Forum Discussion

Mrad_231364's avatar
Mrad_231364
Icon for Nimbostratus rankNimbostratus
7 years ago

Block DNS domain on Big IP DNS

Hello,   I am trying to block certain domains on a specific Listener (ie ) Can you help me writing an iRule?  
AFM
BIG-IP DNS
security
stan_piron's avatar
stan_piron
Icon for Cumulonimbus rankCumulonimbus
7 years ago

you can try something like that:

when DNS_REQUEST {
    if { [DNS::question name] ends_with "example.com" } {
        noerror
        DNS::return
    }
}