Get the IP and Computer Name

Question

I have this code:

localIp = Request.UserHostName
hostName = DetermineCompName(localIp)

Session.Add("localIp", localIp)
Session.Add("hostName", hostName)

As you can see, I put the 2 variables on a session so that I can use it when I want. Testing the app on 10 computers, I saw that on some of the computers it gets the Client IP and the Computer name, but on others it goes empty.

As in some computers it works, I don't understand what's wrong. Does anyone have the right method to do this?

for hostname of the machine i've used: System.Net.Dns.GetHostEntry(Request.ServerVariables("remote_addr")).HostName assuming this is ASP ? For IP i think - Dim h As String = System.Net.Dns.GetHostEntry(Request.ServerVariables("remote_addr")).AddressList(0) ? — Shovers_
– Shovers_, Commented Jan 5, 2017 at 13:55

Rémi Gaudin · Accepted Answer · 2017-01-06 16:22:26Z

3

To get the computer name you can simply do:

Dim hostName As String = Environment.MachineName

or:

Dim hostName As String = My.Computer.Name

For the IP it's a little bit trickier, I assume you want the ipV4, so you can try this:

Dim localIp As String
For Each address As System.Net.IPAddress In System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName).AddressList
    If address.AddressFamily = Net.Sockets.AddressFamily.InterNetwork Then
        localIp = address.ToString()
        Exit For
    End If
Next

Please note that if you do just:

System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName).AddressList(0).ToString()

then this will return the ipV6.

edited Jan 6, 2017 at 16:22

answered Jan 6, 2017 at 16:17

Rémi Gaudin

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