#!/bin/bash set -x $XT_MULTI iptables -t filter -N c1 || exit 0 $XT_MULTI iptables -t filter -N c1 || exit 1 $XT_MULTI ip6tables -t filter -N c1 || exit 0 $XT_MULTI ip6tables -t filter -N c1 || exit 1 echo "E: Duplicate chains" >&2 exit 0
