For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

cccu_werner's avatar
cccu_werner
Icon for Altostratus rankAltostratus
Apr 22, 2021

Using RESOLVER::name_lookup to return an IP address for a FQDN

Hi.   We are running 15.1 and we have a Virtual Server (webservice app) with an irule that only allows certain IP addresses making requests to it.   One of our external service providers hav...
application delivery
BIG-IP
iRules
cccu_werner's avatar
cccu_werner
Icon for Altostratus rankAltostratus
Apr 23, 2021

Hi Jason

 

Here is a section of the irule

 

when HTTP_REQUEST { 

 

#work in progress section

  set fqdn testing.test-url.com

  set ips [RESOLVER::name_lookup "/Common/f5-aws-dns" $fqdn a]

   

  log local0. "$fqdn IP address resolved to $ips"

   

  set rs [RESOLVER::summarize $ips]

  log local0. "which resolves to $rs"

 

}

 

Yes we have read through your article.

 

Many thanks