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Forum Discussion

walou12_113339's avatar
walou12_113339
Icon for Nimbostratus rankNimbostratus
Jun 25, 2014

help with a DNS response irule

HI, I'm looking for help with an irule that will be attached to a DNS VIP on a LTM v11.x. Its purpose is to supply a fixed response to a particular client querie, all other queries go to the DNS ...
application delivery
design
devops
dns
iRules
LTM
kunjan's avatar
kunjan
Icon for Nimbostratus rankNimbostratus
Jun 25, 2014

Try this:

when DNS_REQUEST {
  set ttl 1800
  set A "[DNS::question name]. $ttl [DNS::question class] [DNS::question type]"

  if { [string tolower [DNS::question name]] ends_with "msftncsi.com" } { 
     DNS::answer insert  "$A 125.56.204.104"
  }
  else {
     pool internal-dns
   }
  DNS::return
}