Systemd service file to keep an ssh reverse tunnel open

autossh.service

[Unit]
Description=Keeps a tunnel to home open
After=network.target

[Service]
User=<username>
# -p [PORT]
# -l [user]
# -M 0 --> no monitoring
# -N Just open the connection and do nothing (not interactive)
# LOCALPORT:IP_ON_EXAMPLE_COM:PORT_ON_EXAMPLE_COM

ExecStart=/usr/bin/ssh -g -NC -tt -o "ServerAliveInterval=10" -o "ExitOnForwardFailure=yes" -o "StrictHostKeyChecking=no" -R <local_port>:127.0.0.1:22 <local_user>@<public_ip> -p 8481
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target