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Livius's avatar
Livius
Icon for Cirrus rankCirrus
May 31, 2018

Extract the IP address in iRule from ADDITIONAL SECTION response in DNS query

Hi,   I have a piece of code in iRule triggering a DNS query on a VS as follows :   set original_fqdn [findstr $RouteValue "sip:N" 4 ";"] if {$static::debug} {log local0.info "fqdn =...
application delivery
BIG-IP
BIG-IP DNS
youssef1's avatar
youssef1
Icon for Cumulonimbus rankCumulonimbus
Jun 04, 2018

Hi,

try this:

set clientptr [RESOLV::lookup @8.8.8.8 $original_fqdn]

Where 8.8.8.8 is your dns, you can set a vs if you want:

set clientptr [RESOLV::lookup @/Common/VS $original_fqdn]

You can also retrieve ptr, ... example

set clientptr [RESOLV::lookup @8.8.8.8 -ptr $original_ip]

for your info:

https://devcentral.f5.com/wiki/irules.resolv__lookup.ashx

regards