Problem in fetching Local/ User Machine IP in Asp.Net web project.

Problem: -   Problem in fetching Local/ User Machine IP in Asp.Net web project.
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Environment: -
Operating System            :  Windows Server 2008 R2 Service Pack 1
System type                     :  64 – bit Operating System
 
Proxy Server                    :  Proxy Server is configured
Web Application Level    :  Enterprise Level
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Description: - We have requirement to push user machine local IP from Asp.Net application and store it into MSSQL.
As application is deploying in proxy server environment and its implementation would deploy on enterprise level, so we are looking for some enterprise level snippet whi ...