#!/bin/sh ip link show gnunet-dns 1>/dev/null 2>/dev/null || exit 0 iptables -t mangle -I OUTPUT 1 -p udp -m owner --gid-owner gnunetdns --dport 53 -j ACCEPT iptables -t mangle -I OUTPUT 2 -p udp --dport 53 -j MARK --set-mark 136708149