Getting the IP Address of a Remote Socket Endpoint

Question

How do I determine the remote IP Address of a connected socket?

I have a RemoteEndPoint object I can access and well as its AddressFamily member.

How do I utilize these to find the ip address?

Thanks!

Currently trying

IPAddress.Parse( testSocket.Address.Address.ToString() ).ToString();

and getting 1.0.0.127 instead of 127.0.0.1 for localhost end points. Is this normal?

score 93 · Accepted Answer · edited Jan 05 '22 at 14:16

http://msdn.microsoft.com/en-us/library/system.net.sockets.socket.remoteendpoint.aspx

You can then call the IPEndPoint..::.Address method to retrieve the remote IPAddress, and the IPEndPoint..::.Port method to retrieve the remote port number.

More from the link (fixed up alot heh):

Socket s;
        
IPEndPoint remoteIpEndPoint = s.RemoteEndPoint as IPEndPoint;
IPEndPoint localIpEndPoint = s.LocalEndPoint as IPEndPoint;

if (remoteIpEndPoint != null)
{
    // Using the RemoteEndPoint property.
    Console.WriteLine("I am connected to " + remoteIpEndPoint.Address + " on port number " + remoteIpEndPoint.Port);
}

if (localIpEndPoint != null)
{
    // Using the LocalEndPoint property.
    Console.WriteLine("My local IpAddress is " + localIpEndPoint.Address + " connected on port number " + localIpEndPoint.Port);
}

score 8 · Answer 2 · edited Sep 02 '15 at 13:32

8

string ip = ((IPEndPoint)(testsocket.RemoteEndPoint)).Address.ToString();

edited Sep 02 '15 at 13:32

Filipe Borges

2,712
20
32

answered Sep 02 '15 at 13:00

buzzard51

1,372
2
23
40

Bertrand Marron · Answer 3 · 2009-12-14T23:23:13.900

5

RemoteEndPoint is a property, its type is System.Net.EndPoint which inherits from System.Net.IPEndPoint.

If you take a look at IPEndPoint's members, you'll see that there's an Address property.

edited Dec 14 '09 at 23:23

answered Dec 14 '09 at 23:17

Bertrand Marron

21,501
8
58
94

1

All I see available for RemoteEndPoint's members is AddressFamily. How do I gain access to Address? – bobber205 Dec 14 '09 at 23:28
1

((System.Net.IPEndPoint)socket.RemoteEndPoint).Address – Bertrand Marron Dec 14 '09 at 23:33
Thank you! :) I am trying string remoteIP = IPAddress.Parse( testSocket.Address.Address.ToString() ).ToString(); and getting "1.0.0.127" instead of "127.0.0.1" for localhost connections. Is this normal? – bobber205 Dec 15 '09 at 00:01
9

Actually IPEndPoint inherits from EndPoint. The cast suggested may fail at run time. – Sebastian Good Jul 13 '11 at 03:14

score -2 · Answer 4 · answered Dec 21 '15 at 20:56

-2

I've made this code in VB.NET but you can translate. Well pretend you have the variable Client as a TcpClient

Dim ClientRemoteIP As String = Client.Client.RemoteEndPoint.ToString.Remove(Client.Client.RemoteEndPoint.ToString.IndexOf(":"))

Hope it helps! Cheers.

answered Dec 21 '15 at 20:56

Marshall

392
1
4
11

1

You don't have to do all those string functions. It is much faster to just cast to IPEndPoint - DirectCast(Client.Client.RemoteEndPoint, IPEndPoint).Address – JDC Apr 18 '18 at 08:59

Getting the IP Address of a Remote Socket Endpoint

4 Answers4

Linked