Here's what i use to tunnel VNC sessions. Maybe it'll help. I'm not really a fan of one-liners, so i'll leave it in a readable form ;-)

use POE;
use POE::Filter::Stream;
use POE::Filter::Line;
use POE::Component::Proxy::TCP;
$|++;  
POE::Component::Proxy::TCP->new
(Alias => "ProxyServerSessionAlias",
 Port               => $ARGV[1],
 OrigPort           => $ARGV[2],
 OrigAddress        => $ARGV[0],
 RemoteClientFilter => "POE::Filter::Stream",
 RemoteServerOutputFilter => "POE::Filter::Stream",
 RemoteServerInputFilter => "POE::Filter::Stream"
);
$poe_kernel->run();
exit 0;
[download]

Note: I don't fully understand the code (or more precise the workings of the POE:: stuff), i just copied it from various examples and modified it until it more or less worked. I *know* one shouldn't do that, but i was in a bit of hurry... And YES, it lacks strict and warnings. You wanted small code, right?