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Last active January 5, 2021 01:36
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Tips and Tricks with SSH
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ssh.md

Setting up a reverse SSH Tunnel

ssh -N -R 2210:localhost:22 username@host.com

This command can be interpreted as, create a tunnel between the remote host's port 2210 and localhost:22, where the remote host is host.com.

-R implies that the tunnel will be used from the remote side - i.e. host.com.

This command will initiate an ssh connection with reverse port forwarding option which will then open listening port :2210 on host.com who is going to be forwarded back to localhost's port :22 and all this will happen on the remote computer username@host.com

Setting up a forward SSH Tunnel

ssh -N -L 2210:node003:22 username@host.com

This command can be interpreted as, create a tunnel between the current host's port 2210 and node003:22 of host.com.

-L implies that the tunnel will be used from the host that initiated the tunnel.

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