SSH Tunneling - Local Port Forwarding Example

port from local machine to remote machine

1. execute tunneling command on local machine
ssh -nNT -L8081:marcuschiu-php56.cloudatron.com:8080 localhost

this will pipe everything from localhost:8081 (your local machine’s port 8081) to marcuschiu-php56.cloudatron.com:8080 (the remote machine’s port 8080).

2. Test the tunneling

• Open a new terminal and execute

  ssh marcuschiu-php56.cloudatron.com

  then in your remote machine execute

  nc -l 8080

  this command will have remote machine listen on port 8080

• Open a new terminal and execute

  echo “Hello World” | nc localhost 8081

  this will push “Hello World” into the localhost port 8081 which is your LOCAL machine’s port 8081.

• go back to the terminal where you executed ‘nc -l 8080’

  you should see “Hello world”