Monitor ALL eth0 Traffic Except My Own SSH Session tcpdump:

I'm using tcpdump to dump, debug and monitor traffic on a network. However, there is lots of noise and I would like to exclude ssh from my dumps. How do I monitor all traffic except my ssh session?

The tcpdump command displays out the headers of packets on a network interface that match the boolean expression. In other words you can use boolean expression to drop ssh traffic from dumping and monitoring operation using the following syntax:

tcpdump -i eth0  -s 1500 port not 22

You can skip additional ports too:

tcpdump -i eth0  -s 1500 port not 22 and port not 53

You can also use ip or hostname:

tcpdump -i eth0 port not 22 and host 1.2.3.4

See also:

man tcpdump