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

brwalk0069's avatar
brwalk0069
Icon for Nimbostratus rankNimbostratus
Sep 09, 2019

iRule to set recursion on DNS request

Hi guys,

Wondered if anyone had experience of or knows of a resource online for how to set the recursion flag on a DNS request?

I'm forwarding the DNS request based on domain with another iRule but the recursion flag must be set or it doesn't work.

Any advice would be much appreciated!

application delivery
BIG-IP DNS
iRules

1 Reply

  • brwalk0069's avatar
    brwalk0069
    Icon for Nimbostratus rankNimbostratus
    Sep 10, 2019

    Incase anyone is interested I managed to get an iRule working for this;

    when DNS_REQUEST {
  if { [DNS::header rd] eq "0" } {
    DNS::header rd 1
  }
}

    Cheers