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caseyfw/reverse-ssh-tunnel.service

Created August 28, 2018 11:31
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Reverse ssh tunnel systemd service
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reverse-ssh-tunnel.service
[Unit]
Description=Reverse SSH tunnel to scratch.
After=network-online.target
Before=multi-user.target
DefaultDependencies=no
[Service]
Restart=always
RestartSec=10
ExecStart=/usr/bin/ssh \
-i /etc/tunnel/id_rsa \
-o StrictHostKeyChecking=no \
-o UserKnownHostsFile=/dev/null \
-o ServerAliveInterval=20 \
-o ServerAliveCountMax=1 \
-o ExitOnForwardFailure=yes \
-N \
-T \
-R 2222:localhost:22 \
casey@scratch.caseyfulton.com
[Install]
WantedBy=multi-user.target
@caseyfw
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caseyfw commented Aug 28, 2018

Runs as root, though you could set the user to something unprivileged and put an ssh key in an appropriate spot. -N means "don't run any commands", -T means "disable tty allocation".

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