Getting the IP address of server in ASP.NET?

Question

How do I get the IP address of the server that calls my ASP.NET page? I have seen stuff about a Response object, but am very new at c#. Thanks a ton.

Answer 1

The above is slow as it requires a DNS call (and will obviously not work if one is not available). You can use the code below to get a map of the current pc's local IPV4 addresses with their corresponding subnet mask:

public static Dictionary GetAllNetworkInterfaceIpv4Addresses()
{
    var map = new Dictionary();

    foreach (var ni in NetworkInterface.GetAllNetworkInterfaces())
    {
        foreach (var uipi in ni.GetIPProperties().UnicastAddresses)
        {
            if (uipi.Address.AddressFamily != AddressFamily.InterNetwork) continue;

            if (uipi.IPv4Mask == null) continue; //ignore 127.0.0.1
            map[uipi.Address] = uipi.IPv4Mask;
        }
    }
    return map;
}

warning: this is not implemented in Mono yet