Where to find info on programs using different ports?

[Svante Signell <svante.signell@telia.com>]

Sorry for being so sloppy on spell checking (especially the subject line):
program susing -> programs using
 
Svante Signell writes:
 > Having port watching tools running one experiences a lot of
 > attacks/attempts ot use various ports. How to find out which orts are
 > used by which program s (both in the *nix and win* world).
 > 
 > Some examples, (cut from /etc/services)
 > Known:
 > ftp             21/tcp
 > telnet          23/tcp
 > www             80/tcp          http            # WorldWideWeb HTTP
 > sunrpc          111/tcp         portmapper      # RPC 4.0 portmapper TCP
 > socks           1080/tcp                        # socks proxy server
 > 
 > Unknown:
 > netbios-ssn     139/tcp                         # NETBIOS session service
 > asp             27374/tcp                       # Address Search Protocol
 > port 1214/tcp? morpheus
 > 
 > BTW: Setting up firewall with fwbuilder, but this tool seems to be
 > requiring non-trivial effort. Examples, or other tools?
 > 
 > 
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