#!/usr/bin/perl
use Net::Appliance::Session;

 my $s = Net::Appliance::Session->new({
     personality => 'ios',
     transport => 'SSH',
     host => $HOST,
     privileged_paging => 1, # only if using ASA/PIX OS 7+
                             # and there are other behaviour options, see below
 });

 try {
     $s->connect({ username => 'XXXXX', password => 'XXXXXXX' });

     $s->begin_privileged;
     print $s->cmd('show ver');
     $s->end_privileged;
 }
 catch {
     warn "failed to execute command: $_";
 }
 finally {
     $s->close;
 };