Quincy Center for Technical Education
Computer Technology Department

Netstat

Displays protocol statistics and current TCP/IP network connections. This command is available only if the TCP/IP protocol has been installed.

netstat [-a] [-e] [-n] [-s] [-p protocol] [-r] [interval]

Parameters

-a

Displays all connections and listening ports. Server connections are normally not shown.

-e

Displays Ethernet statistics. This may be combined with the -s option.

-n

Displays addresses and port numbers in numerical form (rather than attempting name look-ups).

-s

Displays per-protocol statistics. By default, statistics are shown for TCP, UDP, ICMP, and IP. The -p option can be used to specify a subset of the default.

-p protocol

Shows connections for the protocol specified by protocol; protocol can be tcp or udp. If used with the -s option to display per-protocol statistics, protocol can be tcp, udp, icmp, or ip.

-r

Displays the contents of the routing table.

interval

Redisplays selected statistics, pausing interval seconds between each display. Press CTRL+B to stop redisplaying statistics. If this parameter is omitted, netstat prints the current configuration information once.