CODEWITHSUNDEEP
vb.netsocketstcpclient-serverip
Mohit
Mohit

Reputation: 31

Connecting to a remote machine through client-server

I have created a simple tcp client-server application in vb.net. Everything works fine when i set local host (127.0.0.1) as the ip address. I wish to make a connection to a remote machine (keeping client at my machine and server on the other - or vice versa).

EDIT:

ok, the code of interest is as follows:

the server:

Dim server As TcpListener = New TcpListener(IPAddress.Any, port)

the client:

Dim theip As IPAddress = IPAddress.Parse(TextBox1.Text) client = New TcpClient(theip.ToString, port)

Now, what should i enter in "TextBox1.Text" if i have my client on a remote machine (connected over internet) and server at a different computer (whose external IP address is known)? Can i enter the external IP address of the machine running the server directly in the text box? Also, do i need to take care of things like "port forwarding" / "let firewall allow the connection" and all? If yes, can you please guide me or link a tutorial so that my application does this automatically or is there an alternative approach to achieve this and so that port forward is not required? Thanks a lot!

Upvotes: 0

Views: 2195

Answers (1)

peterG
peterG

Reputation: 1641

You say the other machine has an external ip address. This implies it also has a local ip address; ie it is behind a NAT firewall or similar. In this case, you will have to configure the firewall to allow communication to take place, eg by setting up port forwarding. Applications such as MSN Messenger, VOIP clients etc have elaborate mechanisms to negotiate this automatically, but they're often not very successful.

Upvotes: 0

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