Re: X-Forwarded-For

[John ORourke]

Jonathan Vanasco wrote:

my mp2 needs to get the ip of the remote address
on some installations, mp2 is on port 80
on other installations, mp2 is on 80xx and the ip is in X-Forwarded-For


You could re-write the remote IP at an early stage - add a 
PerlFixupHandler or PerlTransHandler which goes something like (assuming 
its IPv4!):

sub handler { my $r=shift;
   if($r->headers_in->{'X-Forwarded-For'} =~/(\d+\.\d+\.\d+\.\d+)/){
      $r->remote_ip($1);
   }
   return DECLINED; # let other handlers run too
}

Remember your proxy might be just be adding to an existing 
x-forwarded-for header if the user already came from a proxy, so adjust 
the regex to pick the right IP - it's probably the first one in a comma 
separated list if all the proxies are well behaved but remember it's a 
non-standard header.

John