How to Get IP Address?

user_179032 0
Viewed 79255

I want to get the ip address whoever is registering in my site. How to do this in ASPNET. I used the following code, but, it is not getting the proper IP Address

string ipaddress = Request.UserHostAddress;
asp.net .net c#
6 Answers

You can use this method to get the IP address of the client machine.

public static String GetIP()
{
    String ip = 
        HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

    if (string.IsNullOrEmpty(ip))
    {
        ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
    }

    return ip;
}
user_970100

HTTP_X_FORWARDED_FOR should be used BUT it can return multiple IP addresses separated by a comma. See this page.

So you should always check it. I personally use the Split function.

public static String GetIPAddress()
{
    String ip = 
        HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

    if (string.IsNullOrEmpty(ip))
        ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
    else
        ip = ip.Split(',')[0];

    return ip;
}
user_159280

If a client is connecting through a transparent non-anonymous proxy, you can get their address from:

Request.ServerVariables["HTTP_X_FORWARDED_FOR"]

which can return null or "unknown" if the IP can't be obtained that way.

Request.ServerVariables["REMOTE_ADDR"] should be the same as Request.UserHostAddress, either of which can be used if the request is not from a non-anonymous proxy.

However, if the request comes from an anonymous proxy, then it's not possible to directly obtain the IP of the client. That's why they call those proxies anonymous.

user_2113780
Related