Doesn't work... It seems that there is no way to specify an interface for LWP. The only way works for me seems to add a proper rule into the route table, but doing this needs root privileges.

Doesn't work... It seems that there is no way to specify an interface for LWP

?? bullpucky

#!/usr/bin/perl --
use strict;
use warnings;

use LWP 5.826;
use LWP::Protocol::http;

#perldoc -q "How do I find out my hostname/domainname/IP address?"
use Socket;
use Sys::Hostname;
my $host = hostname();
my $addr = inet_ntoa(scalar gethostbyname($host || 'localhost'));

my $ua = LWP::UserAgent->new();

{
  print "# works like default\n";
  local @LWP::Protocol::http::EXTRA_SOCK_OPTS = ( LocalAddr => $addr )
+;
  print $ua->get("http://www.example.com")->status_line,"\n";
}

{
  print "# bad hostname\n";
  local @LWP::Protocol::http::EXTRA_SOCK_OPTS = ( LocalAddr => "nohost
+:666" );
  print $ua->get("http://www.example.com")->status_line,"\n";
}

{
  print "# unknown error\n";
  local @LWP::Protocol::http::EXTRA_SOCK_OPTS = ( LocalAddr => "localh
+ost" );
  print $ua->get("http://www.example.com")->status_line,"\n";
  printf "$^E\n";
}

__END__

# works like default
200 OK
# bad hostname
500 Can't connect to www.example.com:80 (Bad hostname 'nohost:666')
# unknown error
500 Can't connect to www.example.com:80 (connect: Unknown error)
A connection attempt failed because the connected party did not proper
+ly respond after a period of time, or established
connection failed because connected host has failed to respond
[download]

Not a perl solution

You can configure your routing table to outlet via the eth1 inteface. I did this for my own purpose in *nix machine. You can also refer "route" command in unix