How to get the Machine Public Ip address of the Client computer ?

Question

Hi Team,

I need to get the local machine ip address of the client which uses our website.
Our Web application is build on .Net Core 3.1 , and hosted in Azure app service.
Basically we have a custom developer portal same as the apim developer portal where the client/user can test the http(GET/POST/PUT/DELETE) apis.
We are whitelisting the Product(contains apis) using the ip-filter policy so that only dedicated client/user can access those apis.

To do that we are unable to get the Ips using C# code.

Below are the ways we have tried -  
1)
  IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
                List

Answer 1

Please recommend some solution to get the current local machine ip of the Client.

You might need to check the HTTP_X_FORWARDED_FOR variable too if the client is behind a proxy or you have a network device between the client and your web application.

context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

Keep in mind, using HTTP_X_FORWARDED_FOR does not yield the local machine IP of the Client. This information is simply not available over TCP. That is, if I understand what you're trying to do. The web server and client need to be on the same network in order for the web server to see the client's local IP. The best you can get is Client's WAN address which might change over time depending on how the client's network works.
Perhaps create an authentication/authorization solution rather than IP.

Answer 2

Hi,@ViShal pawar, you could refer to AgaveJoe's answer,

Also,here's a build-in api to get the ipaddress: HttpContext.Connection.RemoteIpAddress

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Best regards, Ruikai Feng