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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 Nacreous rankNacreous

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

This is the iRule that I have mapped out, still does not work. :( any comments?

 

when HTTP_REQUEST { if { [HTTP::host] contains "externaldomain.com" } { set new_host [string map {externaldomain internaldomain} [HTTP::host]] set ips [lindex [RESOLV::lookup -a [$new_host]] 0] node $ips [TCP::local_port] } }