iptables clear rules ignore docker

iptables_ignore_docker.sh

function clear(){
     table=$1
     chain=$2
     iptables -t $table -L $chain -n --line-numbers -v | grep -iv 'docker' | grep '^[0-9]' | awk '{print $1}' | sort -nr | xargs -rl iptables -D $chain
}

clear filter FORWARD
clear nat PREROUTING
clear nat POSTROUTING
clear nat OUTPUT

iptables -t nat -L | grep "^Chain" | awk '{print $2}' | grep -ivE 'PREROUTING|DOCKER|POSTROUTING|OUTPUT' | xargs -rl iptables -t nat -X