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Deepti_Nayak_26's avatar
Deepti_Nayak_26
Icon for Nimbostratus rankNimbostratus
Jun 06, 2017

Irule for reverse DNS lookup

Hello , Currently we have applied Irule for DNS lookup & allowing DNS entries that only ends with a a particular fqdn for e.g when DNS_REQUEST { set fqdn [DNS::question name] ...
BIG-IP DNS
iRules
security
dragonflymr's avatar
dragonflymr
Icon for Cirrostratus rankCirrostratus
Jun 07, 2017

Hi,

 

If you know subnet used by PTR request in advance just use it in DNS_REQUEST event in similar way as for domain names.

 

Just test request type before doing comparison, if type A use current code, if type PTR use code comparing IP in request to your IP range.

 

Piotr