autossh.service

[Unit]
Description=AutoSSH tunnel service on local port
After=network.target

[Service]
Environment="AUTOSSH_GATETIME=0"
ExecStart=/usr/bin/autossh -C -M 0 -v -N -o "ServerAliveInterval=60" -R subdomain.domain.com:80:localhost:80 serveo.net
User=root
Group=root

[Install]
WantedBy=multi-user.target