How to Get Public IP From LinkSys Router?

[Matthew Emmerton]

> I need to get my public IP address from a LinkSys cable router and don't
> have any idea where to start.  The LinkSys is doing NAT and my FBSD box
> in on the private network on the inside.  What commands and/or ports are
> there that would provide the public IP address from the command line so
> I pass the IP to a script?  Any ideas?

The way I do it with my router (BEFW11S4 V2) is to use lynx to download the
HTML status page from the router and extract the public IP address.  I do
this in a cron job every 15 minutes, and when it notices an IP change, it
fires off my dynamic DNS updates.

--
Matt Emmerton