Pppd.service

systemd unit file for pppd

To initiate a PPP connection on /dev/ttyS0, first set the link parameters under /etc/default/pppd-ttyS0:

SPEED=115200
LOCAL_IP=192.168.7.1
REMOTE_IP=192.168.7.2

Where $SPEED is the speed of the connection, $LOCAL_IP is our IP and $REMOTE_IP is the peer's address.

Start the service:

systemctl start pppd@ttyS0

Any character device can be used that is found under /dev. The config file of /dev/ttyUSB0 is found at /etc/default/pppd-USB0 and the service is started with systemctl start pppd@ttyUSB0.

The service automatically restarts on any failure and will try to establish the connection.