Tunneling with OpenSSH
From Linuxintro
SSH Tunneling or SSH port forwarding is typically useful if you have a network with a private segment like this:
-----------------------------------------------------------
| |
| |
--------- ----------- -------------- |
|localhost|-------------------------| gateway |------------------| hidden | |
--------- | 10.2.2.18 | | 172.16.0.42 | |
----------- -------------- |
| |
-----------------------------------------------------------
On localhost forward port 2222 to hidden's port 22:
ssh -L 2222:172.16.0.42:22 gateway
Then you can e.g. scp from localhost to hidden by using localhost's port 2222:
scp -P 2222 file1 localhost:
Examples
This command forwards your computer's port 8080 to port 8080 of the host "proxy":
ssh -gL 8080:proxy:8080 localhost
