How to get Client or visitor IP Address:: Despite multiple tries Didn't get solution:

Question

How to get Client or visitor IP Address:: Despite multiple tries Didn't get solution: Below what I tried:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string ipAddress33 = Request.UserHostAddress.ToString();
        string strHostName = System.Net.Dns.GetHostName();
        string clientIPAddress22 = System.Net.Dns.GetHostAddresses(strHostName).GetValue(1).ToString();
        Response.Write("System.Net.Dns.GetHostAddresses(strHostName).GetValue(1).ToString(); : " + clientIPAddress22 + "<br />");
        string ipaddress;
        string IP = Request.UserHostAddress;
        string clientIPAddress = this.Page.Request.ServerVariables["REMOTE_ADDR"];
        string IP2 = Environment.GetEnvironmentVariable("CLIENTNAME");

        ipaddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
        if (ipaddress == "" || ipaddress == null)
            ipaddress = Request.ServerVariables["REMOTE_ADDR"];
        Response.Write("Request.ServerVariables['HTTP_X_FORWARDED_FOR'] : " + ipaddress + "<br />");
        Response.Write("Request.UserHostAddress.ToString() : " + ipAddress33 + "<br />");

        string stringIpAddress;
        stringIpAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
        if (stringIpAddress == null) //may be the HTTP_X_FORWARDED_FOR is null
        {
            stringIpAddress = Request.ServerVariables["REMOTE_ADDR"];//we can use REMOTE_ADDR
        }
        Response.Write("Request.ServerVariables['REMOTE_ADDR'] : " + stringIpAddress + "<br />");

        //Get the Host Name
        string stringHostName = Dns.GetHostName();
        //Get The Ip Host Entry
        IPHostEntry ipHostEntries = Dns.GetHostEntry(stringHostName);
        //Get The Ip Address From The Ip Host Entry Address List
        IPAddress[] arrIpAddress = ipHostEntries.AddressList;
        Response.Write("Dns.GetHostName():  " + arrIpAddress[arrIpAddress.Length - 1].ToString());

    }

}

This is the results I got:

System.Net.Dns.GetHostAddresses(strHostName).GetValue(1).ToString(); : 190.80.90.75
Request.ServerVariables['HTTP_X_FORWARDED_FOR'] : 190.80.90.225
Request.UserHostAddress.ToString() : 190.80.90.225
Request.ServerVariables['REMOTE_ADDR'] : 190.80.90.225
Dns.GetHostName(): 190.80.90.75

Which is not the correct IP address of the visitor.

I matched with the LAN IP address provided to the system and it didn't matched — sunil492307_2184700, Nov 20 '18 at 10:35
The global IP address that your computer uses to communicate with the internet is most likely not the same as the local one in your LAN. — Nico Schertler, Nov 20 '18 at 14:03
Thanks Nico schertler, I came to know that when we are using subnets and firewalls, it is not possible to get the clients ip address i.e lan ip address. — sunil492307_2184700, Nov 20 '18 at 17:40

score 0 · Answer 1 · answered Nov 20 '18 at 07:58

0

according to this answer you can use this :

  protected void GetUser_IP()
{
    string VisitorsIPAddr = string.Empty;
    if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
    {
        VisitorsIPAddr = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
    }
    else if (HttpContext.Current.Request.UserHostAddress.Length != 0)
    {
        VisitorsIPAddr = HttpContext.Current.Request.UserHostAddress;
    }
    uip.Text = "Your IP is: " + VisitorsIPAddr;
}

answered Nov 20 '18 at 07:58

FarhadMohseni

395
5
8

Using the above snippet: I got result as "Your IP is: ::1" – sunil492307_2184700 Nov 20 '18 at 10:09
::1 is the loopback address in IPv6. the IPv6 version of 127.0.0.1 . if you running it on your local host , the result is normal – FarhadMohseni Nov 20 '18 at 12:05
Thanks FarhadMoheseni. – sunil492307_2184700 Nov 20 '18 at 17:41

score 0 · Answer 2 · answered Nov 21 '18 at 03:58

VB.Net Version::
-----------------------------------------------
Shared Sub GetUser_IP()
    If HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR") IsNot Nothing Then
        VisitorsIPAddr = HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR").ToString()
    ElseIf HttpContext.Current.Request.UserHostAddress.Length <> 0 Then
        VisitorsIPAddr = HttpContext.Current.Request.UserHostAddress
    End If
End Sub

How to get Client or visitor IP Address:: Despite multiple tries Didn't get solution:

This is the results I got:

2 Answers2