how to define a tunnel connection to remote desktop in putty?

Question

I need to connect (in rdp ) to a machine (let's call it #1) in my college network ( I have the internal IP of it ) , I also have access the to Linux server machine in the same network in ssh , that I can use to access the #1 , I'm using putty, can someone please explain to me how I can connect to it ?

[My laptop] --->[Linux server] --->[windows machine] in rdp

Thank you,

Bleeding

Answer 1

Let's assume the following:

Linux Server - gate.college-server.com:22 (SSH listens on port 22)

Internal Server - internal.college-server.com:3389 (RDP listens on port 3389)

RDP connection will be on localhost:3399 (the port should be opened)

How to configure the SSH tunnel via Putty with RDP forwarding:

• Open Putty and in the Session enter the connection info for the Linux Server
• Go to branch > Connection > SSH > Tunnels
• Choose Local and Auto
• in the Source Port enter 3399, and in the Destination - the connection info of the internal machine in the format: hostname:port.
• Click Add

you will see entry in the Forwarded ports section, something like:

4L3399   internal.college-server.com:3389

Save your connection and it's ready to use.

Next, start the a PuTTy Session with the Saved Connection and after you login successfully to the remote server gate.college-server.com:22, you can start your Windows RDP client.

Connect with it to localhost:3399 and use the RDP credentials for internal.college-server.com:3389

Subduct

in rdp client in windows, are sure I have to enter: localhost:3399 ? it gives me an error "This computer can't connect to the remote computer" – Bleeding

and the forward ports look like this: L3399 internal.college-server.com:3389 without the 4 in start , I did everything you mentioned – Bleeding

did you started the PuTTY session and logged in via SSH, before you tried the RDP client? – Subduct

yes the 4 in the start indicates IPv4 is used, but than I thought it's better to use "Auto", but I forgot to adjust the example. – Subduct

Crucial was the last sentence. internal.college-server.com:3389. This :3389 – Poult