Network Manager PPPoe connection watcher

nm-watcher.service

[Unit]
Description=NetworkManager Watcher
Wants=NetworkManager-wait-online.service
After=NetworkManager-wait-online.service

[Service]
ExecStart=/usr/local/bin/nm-watcher

[Install]
WantedBy=multi-user.target

nm-watcher.sh

#!/bin/bash

while true; do #create a infinite loop to keep looking at your connection
        NET=$(ifconfig ppp0 | grep "inet") # verify if the interface has an assigned IP
        ROUTE=$(fping -r 10 -t 20000 google.com 2>&1 | grep "alive") # try to ping google.com and verify if we have any response
        WEB=$(wget --tries=50 --timeout=500 --spider http://whatismyip.akamai.com 2>&1 | grep "OK") # spiders google.com to verify if the page exists. returns error if a connections is not possible

        if [ ! "$NET" != "" ] || [ ! "$ROUTE" != "" ] || [ ! "$WEB" != "" ]; then # verify if any of the above conditions aren't OK
                while ! fping -I eth0 8.8.8.8 &> /dev/null
                do
                     echo "[WARN] Lost main internet connection"
                     sleep 10s
                done
                echo "[WARN] Trying to reconfigure Network Manager"
                echo $NET
                echo $ROUTE
                echo $WEB
                systemctl daemon-reload
                systemctl restart NetworkManager
                sleep 10m
        fi

        sleep 120s
done

pppdetect.sh

#!/bin/bash
#/etc/NetworkManager/dispatcher.d/pppdetect

if [[ $1 == "ppp0" ]] && [[ $2 == "down" ]]; then
        /usr/bin/systemctl start ppp-watcher
        /usr/bin/systemctl restart NetworkManager NetworkManager-wait-online
fi

if [[ $1 == "ppp0" ]] && [[ $2 == "up" ]]; then
        /usr/bin/systemctl stop ppp-watcher
fi