Hi
May be this can Help.
Look at option 3 on this page,http://www.ezlan.net/myip.html
Jack (MVP-Networking).

<wbsurfver / yahoo.com> wrote in message 
news:1164944574.297109.52650 / l12g2000cwl.googlegroups.com...
>
> Here is my question. I have a laptop and I run a ruby/rails based web
> brick server which serves up html pages. I have emailed people a way to
> access this webserver through a URL that looks sort of like:
>
> http://201.120.126.203:1000/
>
> I could be at a public library on a wireless connection, and as long as
> my web server is running, people can get to my website. I figured out
> the url through ipconfig. However, now I have a wireless router in my
> condo, so my laptop is wireless through the router. The url I used
> before doesn't work, and of course ipconfig shows a generic intranet or
> whatever ip address for my local area network. Is there anyway I can
> still have someone get to my website on my laptop ?
>
> I suppose I could unplug the router and plug the laptop in if I want to
> show someone something particular, but the cable modem seems to take a
> while to reset and doing it like that of course is kind of a pain
> anyway.
>