Question

System.Net.Sockets connect from bound ip

Asked by: addicktz

I am trying to get the socket to connect from a specific IP. but instead of connecting from the ip I am specifying, it connects from the "default" IP.

Any ideas on how I can get this to work?

Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
client.Bind(new IPEndPoint(IPAddress.Parse("xx.xx.xx.xx"), 34657));                        
client.Connect(new IPEndPoint(Dns.GetHostAddresses(Host)[0], 80));

                                  
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Asked On
2008-12-09 at 14:26:34ID23970933
Topics

C# Programming Language

,

.NET Framework 2.x

,

Microsoft Visual C#.Net

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: drichardsPosted on 2008-12-09 at 17:27:19ID: 23135573

What do you mean by the "default" IP?  Is the host you are connecting to different from the machine where your app is running?

 

by: CyrexCore2kPosted on 2008-12-09 at 20:02:24ID: 23136188

Try changing this line:

client.Bind(new IPEndPoint(IPAddress.Parse("xx.xx.xx.xx"), 0));

and see if that works. I would test it myself but I only have one NIC.

 

by: addicktzPosted on 2008-12-09 at 20:10:08ID: 23136216

I have a dedicated server (win server 2k3)  with 8 IPs.
The first IP in the list is x.x.x.23
I am binding to my second IP x.x.x.24 then when I connect to another machine with that socket, the connection is from x.x.x.23 which is not the IP I have bound the socket to.

Any idea on how I can make the connection come from a specific IP on the machine?

 

by: addicktzPosted on 2008-12-09 at 20:45:42ID: 23136344

I tried changing the local bind port to 0

still the same results though.

20120131-EE-VQP-002

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