need howto get dynamic IP off wireless gateway/router

I have a wireless network running with a Linksys router/gateway. My DSL
(with dynamic IP) goes through the Linksys to get at any of my machines,
including the linux one. So to connect to my linux box from outside my lan
I need to get the current, external IP with my linux box and post that IP
somewhere outside the lan. ifconfig only shows the local IP within my lan.
Anyone know of a quick & simple way to check the external IP with a Linksys
router?

I suppose there is a long way: log into the setup (html), go to the status
page, and pars out the current IP. But I'd like something quicker, cleaner,
easier, if it exists.

Thanks

In comp.os.linux.networking Eric wrote:

> Anyone know of a quick & simple way to check the external IP with a
> Linksys router?

What about external services like http://www.myip.com ? The output can
easly be parsed if needed.


Christian

--
Endlich Linux! - http://mundoss.de

On Sat, 21 Feb 2004 08:52:39 GMT, Eric <(E-Mail Removed)> wrote:
> I have a wireless network running with a Linksys router/gateway. My DSL
> (with dynamic IP) goes through the Linksys to get at any of my machines,
> including the linux one. So to connect to my linux box from outside my lan
> I need to get the current, external IP with my linux box and post that IP
> somewhere outside the lan. ifconfig only shows the local IP within my lan.
> Anyone know of a quick & simple way to check the external IP with a Linksys
> router?

Most of us with dynamic IPs use dynamic DNS to access our systems from the
internet. I use no-ip.com. Their update client can either run from ppp
or dhcp scripts if directly connected to dsl/cable modem, or as a daemon
to have them grab your public IP if behind a broadband router.

Although, when I was behind a router, I hacked its firmware to display its
WAN IP without have to login, where I could monitor it with a Perl LWP
daemon script (to check it more often, while minimizing internet traffic).

--
David Efflandt - All spam ignored http://www.de-srv.com/

"Eric" <(E-Mail Removed)> wrote in message
news:r%EZb.42142$(E-Mail Removed) om

> I have a wireless network running with a Linksys router/gateway. My
> DSL (with dynamic IP) goes through the Linksys to get at any of my
> machines, including the linux one. So to connect to my linux box
> from outside my lan I need to get the current, external IP with my
> linux box and post that IP somewhere outside the lan. ifconfig only
> shows the local IP within my lan. Anyone know of a quick & simple way
> to check the external IP with a Linksys router?

Your use of "inside" and "outside" has some confusing inconsistency, but if
I understand correctly:

wget -O- http://whatismyip.com 2> /dev/null | awk '/Your IP/ {print $4}'


tony

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