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

dearsanky's avatar
dearsanky
Icon for Nimbostratus rankNimbostratus
Mar 10, 2016

Redirect the Nxdomain response

Hi, I've got one iRule to redirect the nxdomain response, but whenever i try it to my lab the rule does not work, please let me know if someone can give any idea on it. I want to redirect it to google.page. using TMOS version 11.6

Thanks....

when DNS_RESPONSE {
 if { [DNS::ptype] == "NXDOMAIN" } {
    DNS::answer insert "[DNS::question name]. 60 [DNS::question class] [DNS::question type] x.x.x.x"
       } 
    }
application delivery
BIG-IP DNS
iRules

1 Reply

  • Kai_Wilke's avatar
    Kai_Wilke
    Icon for MVP rankMVP
    Mar 11, 2016

    Hi dearsanky,

     

    you have to overwrite the DNS response code "NXDOMAIN" to "NOERROR".

     

    when DNS_RESPONSE {
    if { [DNS::header rcode] eq "NXDOMAIN" } {
        DNS::header rcode NOERROR
        DNS::answer insert "[DNS::question name]. 60 [DNS::question class] [DNS::question type] 1.1.1.1"
    } 
}

    Cheers, Kai