![]() This type of port forwarding will not work for FTP sessions. On Ubuntu, you would need to do something like this: Under UNIX or Linux, install socat by using the default package installation utility. To relay UDP packets, we will be using socat – a multipurpose relay (SOcket CAT). This is optional and not really required. PuTTY will be used as the GUI based SSH client. If you are looking for a CLI based OpenSSH client on Windows, install a copy of Cygwin. This is found in all Linux distributions. ![]() Tools Required for SSH Port Forwardingįor the CLI based SSH client, we will be using the standard ssh program – an OpenSSH based SSH client. Remote port forwarding is to connect the other way round – from a server to your computer or to another server via the SSH client. Local port forwarding lets you connect from your local computer to another server via the SSH server. We are also only going to talk about local port forwarding and not remote port forwarding. The client computer will establish a SSH session to server server01 and access services (TCP port 80 and UDP port 53) on server server02. ![]() This is going to be our network scenario for this article. In this article, we are going to see how we can use SSH tunnels to forward TCP and UDP packets. ![]() SSH port forwarding also allows you to connect computers from two different networks that are not able to communicate with each other directly. As the connection is encrypted, SSH tunneling is useful for transmitting unencrypted (or non secure) protocols such as POP3, VNC, RDT, etc. SSH port forwarding creates a secure tunnel between the client and server computers. ![]()
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