Hi,
On linux, try lsof -i .
Example:
# lsof -i tcp:80
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
httpd 3593 root 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6959 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6960 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6961 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6962 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6963 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6964 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6965 apache 3u IPv6 8113 TCP *:http (LISTEN)
httpd 6966 apache 3u IPv6 8113 TCP *:http (LISTEN)
Examples taken from lsof man:
---------------------------------------
-i6 - IPv6 only
TCP:25 - TCP and port 25
@1.2.3.4 - Internet IPv4 host address 1.2.3.4
@[3ffe:1ebc::1]:1234 - Internet IPv6 host address 3ffe:1ebc::1, port 1234
UDP:who - UDP who service port
TCP@xxxxxxxxx:513 - TCP, port 513 and host name lsof.itap
tcp@foo:1-10,smtp,99 - TCP, ports 1 through 10, service name smtp, port
99, host name foo
tcp@bar:smtp-nameserver - TCP, ports smtp through nameserver, host bar
:time - either TCP or UDP time service port
Regards
Nicolas
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