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dwallraff/port_forwarding.md

Last active March 16, 2025 10:40
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Add port forwarding to running SSH sessions
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port_forwarding.md

Use SSH's escape sequence <enter>~<shift>+c

user@sshhost $ ~C
ssh> L8080:localhost:8080
Forwarding port.

user@sshhost $ ~C
ssh> KL8080
Canceled forwarding.

If you are connected through multiple nested SSH connections, you can choose to modify the next deeper nested connection by adding one more ~ escape character.

Supported escape sequences:
~. - terminate connection (and any multiplexed sessions)
~B - send a BREAK to the remote system
~C - open a command line
~R - request rekey
~V/v - decrease/increase verbosity (LogLevel)
~^Z - suspend ssh
~# - list forwarded connections
~& - background ssh (when waiting for connections to terminate)
~? - this message
~~ - send the escape character by typing it twice

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