Are you behind a router?  Are you too lazy to go find a proxy, find your IP, find you IIS Port, then check and see if it actually works?

Then get IIS Checker, which will do it for you.

Updates at http://www.q-kid.net/iischecker/update.asp

^^Updates *WILL* Come^^

NOTE: For some reason, you will get a System.Net.Exception when you start it up...I think it has something to do with my IP-Detection class - just click Continue, then within the program click New, then Preform Selected.

I am going to fix that wil IIS Checker 4.

Liscense: Free, of course!

EDIT: Phew -  in my update.asp page, I forgot to change the download to the IIS Checker one - if you downloaded from http://q-kid.net/iischecker/update.asp, and clicked "here" you got to look at my blog! Sorry, but it's now fixed. - the link below worked before, and still does. 

-----------------------

DOWNLOAD (Direct)