How to get client IP

Response.Write("Your IP address is: " + Request.ServerVariables["REMOTE_ADDR"].ToString() + "<br />");

Response.Write("You are browsing this site with: " + Request.ServerVariables["http_user_agent"].ToString() + "<br />");

Response.Write("The method used to call the page: " + Request.ServerVariables["request_method"].ToString() + "<br />");

Response.Write("The server's domain name: " + Request.ServerVariables["server_name"].ToString() + "<br />");

Response.Write("The server's port: " + Request.ServerVariables["server_port"].ToString() + "<br />");

Response.Write("The server's software: " + Request.ServerVariables["server_software"].ToString() + "<br />");

Response.Write("The DNS lookup of the IP address is: " + Request.ServerVariables["REMOTE_HOST"].ToString());

Get users IP address

Oct 30, 2006 07:41 AM | LINK

HttpContext.Current.Request.UserHostAddress;
or
HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

To get the IP address of the machine and not the proxy use the following code

HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

public static string GetIpAddress()  // Get IP Address
    {
        string ip = "";     
        IPHostEntry ipEntry = Dns.GetHostEntry(GetCompCode());
        IPAddress[] addr = ipEntry.AddressList;
        ip = addr[2].ToString();
        return ip;
    }
    public static string GetCompCode()  // Get Computer Name
    {   
        string strHostName = "";
        strHostName = Dns.GetHostName();
        return strHostName;
    }

protected void Button1_Click(object sender, EventArgs e)
    {
    string strHostName = System.Net.Dns.GetHostName();
    string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

    SqlCommand cmd = new SqlCommand("insert into tblIpAddress(IPAddress)values(@IPAddress)", con);
    cmd.Parameters.AddWithValue("@IPAddress", clientIPAddress);
    con.Open();
    cmd.ExecuteNonQuery();
    con.Close();

    }

string strHostName = System.Net.Dns.GetHostName();
       string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(1).ToString();