On Mon, 10 Mar 2003 15:00:59 -0800
Jim C <[EMAIL PROTECTED]> wrote:

> Take the following line for example which resulted from netstat -ntupl:
> 
> > Proto Recv-Q Send-Q Local Address           Foreign Address         State       
> > PID/Program name 
> > tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      
> > 3495/sshd 
> 
> Drop the 'n' and one gest a * instead of '0.0.0.0':
> 
> > Proto Recv-Q Send-Q Local Address           Foreign Address         State       
> > PID/Program name 
> > tcp        0      0 *:ssh                   *:*                     LISTEN      
> > 3495/sshd
> 
> Now a 0 in an IP address is a referece to a network but what does it 
> mean when netstat returns something like this?  Is it listening in 
> general to anyone or is it just reffering to the local machine?  Another 
> possibility I can think of is that it is listening but can't hear anything.

The -l just lists ports that are in the act of listening, whereas active
connections are listed separately. For instance, if you have another
computer on your home network (B), ssh from B to A. Then on A, list all the
TCP connections with a netstat -at. The listening ports (including ssh)
will show a foreign address of as above, and listed separately below in
the active connections you'll see your ssh connection from B to A.

Miark

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