>>Not sure exactly what you are looking for.
>>
>>- Request.UserHostAddress will give IP address of the client making the request
>>- Request.ServerVariables with REMOTE_ADDR variable will give you Host IP address.
>>
>>>I am sending an http request to a web server outside of my firewall. I need to include as a parameter the IP address that the web server will see. For example, if I connect the UT, I assume it can log my ip address. What I need to do in my application is find out what that IP address it appears to come from.
>>>
>>>Sorry if I explained horribly...
>
>What I am looking for is the ip address assigned to my router. If my machine is 10.10.1.1 on my local network, I don't want 10.10.1.1, I want what the IP address will be after it passes through the router to the outside world.

If there is only one hop, then you are talking about your gateway IP address. You can probably get that with NetworkInterface class

Tim