Show ip connections Command
The show ip connections command allows you to display information about active server Transport Control Protocol (TCP) and/or User Datagram Protocol (UDP) connections. For example, this command can show the sockets tied to an HTTPS connection. The following is an example of the show ip connections command output.
ACMEPACKET# show ip connections Active Internet connections (including servers) PCB Proto Recv-Q Send-Q Local Address Foreign Address (state) -------- ----- ------ ------ --------------------- --------------------- ------- 75059a0 TCP 0 0 172.30.80.231.1538 172.30.0.39.58497 TIME_WAIT 7506420 TCP 0 0 172.30.80.231.443 10.1.20.14.51006 TIME_WAIT 75044a0 TCP 0 0 172.30.80.231.443 10.1.20.14.51000 TIME_WAIT 7504f20 TCP 0 0 172.30.80.231.443 10.1.20.14.50997 TIME_WAIT 7503f60 TCP 0 0 127.0.0.1.3000 127.0.0.1.1064 ESTABLISHED 7503a20 TCP 0 0 127.0.0.1.3000 127.0.0.1.1063 ESTABLISHED 75034e0 TCP 0 0 127.0.0.1.3000 127.0.0.1.1062 ESTABLISHED 7502fa0 TCP 0 0 127.0.0.1.3000 127.0.0.1.1061 ESTABLISHED 7502a60 TCP 0 0 127.0.0.1.3000 127.0.0.1.1060 ESTABLISHED 7502520 TCP 0 0 127.0.0.1.1063 127.0.0.1.3000 ESTABLISHED 7501fe0 TCP 0 0 127.0.0.1.1062 127.0.0.1.3000 ESTABLISHED 7501aa0 TCP 0 0 127.0.0.1.1061 127.0.0.1.3000 ESTABLISHED
The following table describes each column in the above output.
| Column Heading | Description |
|---|---|
| PCB | Printed circuit board in the server that is active on the connection. |
| Proto | Protocol used on this connection. Valid values are:
TCP - Transport Control Protocol UDP - User Datagram Protocol |
| Recv-Q | Receiving queue - pertains to the queue on the server that receives packets from the Internet. This column should always display a zero (0). Packets should not be piling up in this queue. |
| Send-Q | Sending queue - pertains to the queue on the server that sends out packets to the Internet. This column should always display a zero (0). Packets should not be piling up in this queue. |
| Local Address | Local server’s IP address and port number, or IP address and the name of a service. |
| Foreign Address | Hostname and service, or IP address and port number to which you are connected. The asterisk is a placeholder for IP addresses, which of course cannot be known until a remote host connects. |
| (state) | Current state of the TCP or UDP connection. TCP states can be:
LISTEN waiting to receive a connection ESTABLISHED a connection is active TIME_WAIT a recently terminated connection; this should last only a minute or two, then change back to LISTEN. The socket pair cannot be re-used as long the TIME_WAIT state persists. UDP is stateless, so the "State" column is always blank. |
