Get the Client Machine IP address from ASP Web application

Question

I have hosted the ASP.Net web application in the server Serv-A and its IP address is 192.168.1.1

I am browsing the above web application in the client machine Client-1 and its IP address is 175.30.1.1.

 

Here i need to capture my Client-1 machine's IP address whenever the applicaiton is accessing. I used the below codes, but i am not able capture the exact Client-1 machine IP address as 175.30.1.1

 

The below codes are not working. Kindly let me know should i configure in the machines too?

 

string IPAddress = Request.ServerVariables["REMOTE_ADDR"]
string IPadd2 = Request.UserHostAddress