persistent reverse port forward with systemd

autossh.service

[Unit]
Description = SSH daemon for rescure
After = network.target

[Service]
ExecStart = /usr/bin/ssh \
		-N \
		-o "ExitOnForwardFailure=yes" \
		-o "StrictHostKeyChecking=no" \
		-o "UserKnownHostsFile=/dev/null" \
		-o "ServerAliveInterval 60" \
		-o "ServerAliveCountMax 3" \
		-R 12345:127.0.0.1:22 host
Restart = always
Type = simple
User = user

[Install]
WantedBy = multi-user.target