Forum Discussion

N_67263's avatar
N_67263
Icon for Nimbostratus rankNimbostratus
Aug 28, 2017

iRule which strips of the domain name and replaces that with another domain name.

Team, Can anyone help me with an iRule which strips of the domain name and does a DNS query with some other domain name? e.g. The F5 intercepts a request on "xyz.externaldomain.com". F5 strips of the...
application delivery
iRules
  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    Aug 28, 2017

    Hi,

    Maybe the following irule may help you :

    when HTTP_REQUEST {
    if { [HTTP::host] contains "xyz.externaldomain.com" } {
        HTTP::header replace Host "xyz.internaldomain.com"
    }
}

    You may also use 

    string map
    command to make the replacement more dynamic

Yann_Desmarest's avatar
Yann_Desmarest
Icon for Cirrus rankCirrus

Hi,

Maybe the following irule may help you :

when HTTP_REQUEST {
    if { [HTTP::host] contains "xyz.externaldomain.com" } {
        HTTP::header replace Host "xyz.internaldomain.com"
    }
}

You may also use 

string map
command to make the replacement more dynamic

N_67263's avatar
N_67263
Icon for Nimbostratus rankNimbostratus
Aug 28, 2017

hey Yann....thanks a ton. I think the logic should work. However, we would like to use the new domain to do a lookup and what ever is the IP returned use that IP address in the node to forward the traffic.

 

Let me work on some extension of iRule with the logic you provided