Name

Active Connections Utility — \windows\system32\netstat.exe

Synopsis

This tool displays protocol statistics and current TCP/IP network connections. See Section 7.2 in Chapter 7 for an example. Type netstat by itself to list the active incoming and outgoing network connections, or use these options: 

netstat [-a] [-e] [-nc] [-o] [-p proto] [-r] [-s] [interval]

Option

Description

-a

Display all connections and open ports.

-e

Display Ethernet statistics; can be combined with -s.

-n

Display addresses and ports in numerical format (e.g. 192.168.0.1:88).

-o

Display the process that owns each listed connection.

-p proto

Show the connections corresponding the protocol; proto can be IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, or UDPv6.

-r

Display the routing table.

-s

Display statistics for each protocol. By default, statistics are shown for all protocols, but this can be filtered with the -p option.

interval

Repeatedly run netstat, pausing interval seconds between each display. Press Ctrl-C to stop the display at any time. If omitted, netstat will display the current statistics once and then quit.

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