tumbler.txt

Associated article: Practical Secure Port Knocking

Tags:      Mobile     Design    

Published source code accompanying the article by John Graham-Cumming in which he examines port knocking, a security technique that allows access to sensitive ports if you know the secret knock. John implements it using the Tumbler protocol. Also see TUMBLER.ZIP.

					Practical Secure Port Knocking
by John Graham-Cumming 


Listing One

#!/usr/bin/perl -w
use strict;
my @knocks;
while ( <> ) {
   my $packet = $_;
   $packet =~ /^((d+.){3}d+).(d+) > ((d+.){3}d+).(d+)/;
   my ($src_ip,$src_port,$dest_ip,$dest_port ) = ($1,$3,$4,$6);
   if ( $...