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Jul 282010

What is the difference between ip address and


Sometimes when using the netstat command, which print out something like

# netstat -ntpl
(No info could be read for "-p": geteuid()=1001 but you should be root.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0    *               LISTEN      -

What is the real meaning of

In fact, this special IP means "all the IP addresses on the local machine". So if you have seen a service listening on, it means you can connect to the service using any IP addresses of the machine.

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