Services

You may define your ports in the /etc/services file so you can use names instead of port numbers in rulesets and have names appearing instead of numbers in logs ;)

Here is a sample of this:

edonkey         4662/tcp
edonkey         4662/udp
[[mldonkey_ext]]    4666/udp
[[overnet_port]]         '''no default'''/tcp
[[overnet_port]]         '''no default'''/udp