tools: ibmonitor for real-time traffic consumed: http://ibmonitor.sourceforge.net/ jnettop for real-time traffic visual analysis : http://download.fedora.redhat.com/pub/epel/4/i386/repoview/jnettop.html tcpdump for real-time packet capture iptables for block unwanted traffic tcpdump howto: 1. dump traffic without port 22 and write it to file log.cap tcpdump -i eth0 not port 22 -n -w log.cap 2. tcpdump for dummies: http://www.alexonlinux.com/tcpdump-for-dummies iptables in [...]