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Dag J Nedrelid
System and web developer. Tech hobbyist. Dad. Gamer.

SSH Tunneling

By Dag, on December 30th, 2016

I love how I can use OpenSSH for both CLI access, SFTP AND Tunneling. Avoid exposing vulnerable ports, and use encrypted tunneling instead.

GNU/LINUX Scenario: Tunnel from localhost:7777 that goes through my SSHD server to remotehost:21 (FTP):
ssh -L 7777:remotehost:21 myuser@remotehost

GNU/LINUX Scenario: Tunnel from remotehost:7777 that goes to my local webserver:80 (WWW):
ssh -R 7777:localhost:80 myuser@remotehost

WINDOWS Scenario: I want a tunnel from localhost:7777 that goes through my SSHD server to remotehost:3389 (RDP):
PuTTY > Connection > SSH > Tunnels > (Add source and destination:port)

From Command Line:
putty.exe -ssh <same command(s) as in GNU/Linux> -l user -pw password

NOTE: Remote tunneling may require GatewayPorts yes in /etc/sshd_config
TIP: Add -fNT as a parameter if you only want to do background port forwarding without opening a shell.