Simple pfsense WAN connection monitor with auto reset and notification

gwmonitor.sh

#!/bin/sh

WWW="https://google.com"
DELAY=30
FAILLIMIT=2
ITERATION=5

www_test() {

    RES=`curl -s -L -X HEAD -4 -o /dev/null --connect-timeout 30 -m 60 $WWW`
    return $?
}


FAILS=0

for i in `seq $ITERATION`;
do

    echo -n "$WWW -> "

    if [ ! www_test ]
    then
        echo "down"
        FAILS=$((FAILS+1))
        logger -i -t gwmonitor "down $FAILS"
    else
        echo "alive"
    fi

    sleep $DELAY
done

if [ $FAILS -ge $FAILLIMIT ]
then

    logger -i -t gwmonitor "down, resetting WAN interface"
    /etc/rc.newwanip

    sleep $DELAY
    /etc/rc.notify_message -e -m "$HOST WAN interface reset after $FAILS/$ITERATION failures detected (Limit: $FAILLIMIT)"
else

    logger -i -t gwmonitor "alive"
fi