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Re: how to determine WAN IP address from behind a NAT router?



Also sprach A.Melon <juicy@melontraffickers.com> (Thu,  5 May 2005 14:10:13 -0700 (PDT)):
> I have connected a Debian box attached to a NAT router to a cable
> modem, and I'd like to determine (preferably from Perl but
> anything will do!) my "internet" IP address (as opposed to
> 192.168...).
> 
> I searched for information on this and found only solutions by
> parsing the output of websites that display the HTTP REMOTE_ADDR.
> But I don't want to rely on an external website.
> 
> I know there must be a way to do this because Gnutella-type
> programs (client) display my "outside" IP address.  How do they
> do it?

$ ping -R -c1 <host outside>

..schould be the first address which is not in your net.

sl ritch.



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