Try websnarf: http://www.unixwiz.net/tools/websnarf-1.04
Set the port to 21 log some of the data they're sending. You can
have it log the session to a file, too, I think. Note that the one
line it grabs may not amount to much of anything, but it might give
you some idea what the machines are
I hacked your code into something multi-threaded--enjoy.
- Matt
#!/usr/bin/perl
# Multi-threaded scan for OpenVNC 4.11 authentication bypass.
# Based on Tyler Krpata's Perl scanning code.
use strict;
use warnings;
use IO::Socket;
use threads;
use threads::shared;
use Errno qw(EAGAIN);
#
