read client IP address

I have a website and try to track client IP to locate his/her for better information tracking.
we use c#/mvc/razor.

any suggestions on what we can use?

Thanks
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ITsolutionWizardAsked:
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Bill PrewIT / Software Engineering ConsultantCommented:
In the controller you should be able to use:

HttpContext.Request.UserHostAddress


»bp
kaufmed   ( ⚆ _ ⚆ )I asked the operating system what I could do to become a better programmer. It said, "Let me give you some pointers."Commented:
Do note that if your infrastructure has any kind of (reverse) proxy server or similar appliance fronting your web server(s), then you may need to configure that appliance to include the X-Forwarded-For header in order to get that information sent to your web server.
ITsolutionWizardAuthor Commented:
kaufmed   ¯\_(ツ)_/¯: can you describe little more? I just want to get IP from the client side.
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ITsolutionWizardAuthor Commented:
Bill Prew: Your way does not work. It always return to my server location. I try my office, at home, and it still return to our server location.
at home i use https://www.iplocation.net/ and put my home ip address, it confirms the city is at my city.
Shaun VermaakTechnical SpecialistCommented:
If you just want it from a logging point of view, and not within the actual application, use IIS logs
Bill PrewIT / Software Engineering ConsultantCommented:
Haven't tested this here, but here's an interesting code snip that you could test out...

Get Client IP Address in ASP.NET

/// <summary>
/// Attempts to retrieve the real client ip (w/ proxy detection).
/// </summary>
/// <returns>The IP address of the remote client,
/// or "0.0.0.0" if it cannot be obtained.</returns>
public static string GetClientIpAddress()
{
    const string defaultValue = "0.0.0.0";
 
    HttpContext context;
    if ((context = HttpContext.Current) == null)
    {
        return defaultValue;
    }
 
    HttpRequest request;
    try
    {
        // store a local ref to the request object:
        request = context.Request;
    }
    catch (HttpException)
    {
        Debug.WriteLine("Http request context is not available.");
        return defaultValue;
    }
 
    //
    // check proxy forwarder indicators first:
    string forwarderForIp = request.ServerVariables["HTTP_X_FORWARDED_FOR"];
    if (!string.IsNullOrEmpty(forwarderForIp))
    {
        int firstCommaIndex = forwarderForIp.IndexOf(',');
        if (firstCommaIndex > 0)
        {
            // X-Forwarded-For can return multiple ip's, so 
            // just get the first one.
            // ex: X-Forwarded-For: client, proxy1, proxy2
            forwarderForIp = forwarderForIp.Substring(0, firstCommaIndex).Trim();
        }
 
        if (!forwarderForIp.Equals("unknown",
            StringComparison.InvariantCultureIgnoreCase))
        {
            return forwarderForIp;
        }
    }
 
    // get the client ip from server from server vars:
    string remoteAdd = request.ServerVariables["REMOTE_ADDR"];
 
    return !string.IsNullOrEmpty(remoteAdd) ? remoteAdd : defaultValue;
}

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»bp

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