Check Port Usage

To check network connections, routing tables, interface statistics, masquerade connections, and multicast memberships with process ids. As root, run netstat with options -vatpun, see more in man netstat.

	netstat -vatpun
	         ||||||
	         |||||+-- show numerical address (ip #).
	         ||||+--- show udp protocol.
	         |||+---- show pid and name of program to which each socket belongs.
	         ||+----- show tcp protocol.
	         |+------ show both listening and non-listening sockets.
	         +------- verbose.

 # netstat -vatpun
 Active Internet connections (servers and established)
 Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
 tcp        0      0 127.0.0.1:2208          0.0.0.0:*               LISTEN     5196/hpiod
 tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN     5284/mysqld
 tcp        0      0 0.0.0.0:6543            0.0.0.0:*               LISTEN     5836/mythbackend
 tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN     4783/portmap
 tcp        0      0 0.0.0.0:6544            0.0.0.0:*               LISTEN     5836/mythbackend
 tcp        0      0 0.0.0.0:113             0.0.0.0:*               LISTEN     5669/inetd
 tcp        0      0 127.0.0.1:44305         0.0.0.0:*               LISTEN     5199/python
 tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN     5446/cupsd
 tcp        0      0 0.0.0.0:51065           0.0.0.0:*               LISTEN     5754/rpc.statd
 tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN     5634/exim4
 tcp        0      0 192.168.15.131:45421    74.125.93.101:80        ESTABLISHED6383/firefox-bin
 tcp        0      0 192.168.15.131:55256    64.233.169.103:80       ESTABLISHED6383/firefox-bin
 tcp        0      0 192.168.15.131:45859    64.233.169.106:80       ESTABLISHED6383/firefox-bin
 udp        0      0 0.0.0.0:32768           0.0.0.0:*                          5546/avahi-daemon:
 udp        0      0 0.0.0.0:32769           0.0.0.0:*                          5754/rpc.statd
 udp        0      0 0.0.0.0:68              0.0.0.0:*                          5679/dhclient
 udp        0      0 0.0.0.0:842             0.0.0.0:*                          5754/rpc.statd
 udp        0      0 0.0.0.0:5353            0.0.0.0:*                          5546/avahi-daemon:
 udp        0      0 0.0.0.0:111             0.0.0.0:*                          4783/portmap
 udp        0      0 0.0.0.0:631             0.0.0.0:*                          5446/cupsd

Page locked (last edited December 2, 2009) [info] [diff])
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