Wrong client IP address

Question

I'm getting client IP address from ASP.NET. But some client IP address received 127.0.0.1. What is problem. How getting valid client ip address?

I'm using this code:

    public static string GetIP()
{
    string clientIp = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
    if (!string.IsNullOrEmpty(clientIp))
    {
        string[] forwardedIps = clientIp.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
        clientIp = forwardedIps[forwardedIps.Length - 1];
    }

    if (string.IsNullOrEmpty(clientIp))
        clientIp = HttpContext.Current.Request.ServerVariables["HTTP_CLIENT_IP"];
    if (string.IsNullOrEmpty(clientIp))
        clientIp = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

    return clientIp.ToString();
}

127.0.0.1 is the localhost address, I suppose that you are connecting to the page from the same computer on which it is hosted? — odyss-jii, Jan 16 '13 at 13:48
just a guess? but could be proxy issues. take a look at http://stackoverflow.com/questions/7445592/what-is-the-difference-between-http-client-ip-and-http-x-forwarded-for — ddavison, Jan 16 '13 at 13:49

score 1 · Answer 1 · answered Jan 16 '13 at 13:50

1

127.0.0.1 is localhost, i.e. the same machine is making the request as is hosting it.

My guess is that what you are seeing is infact your own testing or debugging?

I'd consider Request.IsLocal() as a good way to find out.

answered Jan 16 '13 at 13:50

KingCronus

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attacking my server this IP. it's creating 100-200 session per second. – Codder AE Jan 16 '13 at 14:01

Wrong client IP address

1 Answers1