Create iptables

qbittorrent/iptables

@@ -0,0 +1,170 @@
+#!/bin/bash
+# Kanged from binhex's OpenVPN dockers
+
+# ip route
+###
+
+# split comma seperated string into list from LAN_NETWORK env variable
+IFS=',' read -ra lan_network_list <<< "${LAN_NETWORK}"
+
+# process lan networks in the list
+for lan_network_item in "${lan_network_list[@]}"; do
+
+	# strip whitespace from start and end of lan_network_item
+	lan_network_item=$(echo "${lan_network_item}" | sed -e 's~^[ \t]*~~;s~[ \t]*$~~')
+
+	echo "[info] Adding ${lan_network_item} as route via docker eth0"
+	ip route add "${lan_network_item}" via "${DEFAULT_GATEWAY}" dev eth0
+
+done
+
+echo "[info] ip route defined as follows..."
+echo "--------------------"
+ip route
+echo "--------------------"
+
+# setup iptables marks to allow routing of defined ports via eth0
+###
+
+if [[ "${DEBUG}" == "true" ]]; then
+	echo "[debug] Modules currently loaded for kernel" ; lsmod
+fi
+
+# check we have iptable_mangle, if so setup fwmark
+lsmod | grep iptable_mangle
+iptable_mangle_exit_code=$?
+
+if [[ $iptable_mangle_exit_code == 0 ]]; then
+
+	echo "[info] iptable_mangle support detected, adding fwmark for tables"
+
+	# setup route for deluge webui using set-mark to route traffic for port 8112 to eth0
+	echo "8112    webui" >> /etc/iproute2/rt_tables
+	ip rule add fwmark 1 table webui
+	ip route add default via $DEFAULT_GATEWAY table webui
+
+fi
+
+# identify docker bridge interface name (probably eth0)
+docker_interface=$(netstat -ie | grep -vE "lo|tun|tap" | sed -n '1!p' | grep -P -o -m 1 '^[^:]+')
+if [[ "${DEBUG}" == "true" ]]; then
+	echo "[debug] Docker interface defined as ${docker_interface}"
+fi
+
+# identify ip for docker bridge interface
+docker_ip=$(ifconfig "${docker_interface}" | grep -P -o -m 1 '(?<=inet\s)[^\s]+')
+if [[ "${DEBUG}" == "true" ]]; then
+	echo "[debug] Docker IP defined as ${docker_ip}"
+fi
+
+# identify netmask for docker bridge interface
+docker_mask=$(ifconfig "${docker_interface}" | grep -P -o -m 1 '(?<=netmask\s)[^\s]+')
+if [[ "${DEBUG}" == "true" ]]; then
+	echo "[debug] Docker netmask defined as ${docker_mask}"
+fi
+
+# convert netmask into cidr format
+docker_network_cidr=$(ipcalc "${docker_ip}" "${docker_mask}" | grep -P -o -m 1 "(?<=Network:)\s+[^\s]+")
+echo "[info] Docker network defined as ${docker_network_cidr}"
+
+# input iptable rules
+###
+
+# set policy to drop ipv4 for input
+iptables -P INPUT DROP
+
+# set policy to drop ipv6 for input
+ip6tables -P INPUT DROP 1>&- 2>&-
+
+# accept input to tunnel adapter
+iptables -A INPUT -i "${VPN_DEVICE_TYPE}" -j ACCEPT
+
+# accept input to/from docker containers (172.x range is internal dhcp)
+iptables -A INPUT -s "${docker_network_cidr}" -d "${docker_network_cidr}" -j ACCEPT
+
+# accept input to vpn gateway
+iptables -A INPUT -i eth0 -p $VPN_PROTOCOL --sport $VPN_PORT -j ACCEPT
+
+# accept input to deluge webui port 8112
+iptables -A INPUT -i eth0 -p tcp --dport 8112 -j ACCEPT
+iptables -A INPUT -i eth0 -p tcp --sport 8112 -j ACCEPT
+
+# process lan networks in the list
+for lan_network_item in "${lan_network_list[@]}"; do
+
+	# strip whitespace from start and end of lan_network_item
+	lan_network_item=$(echo "${lan_network_item}" | sed -e 's~^[ \t]*~~;s~[ \t]*$~~')
+
+	# accept input to deluge daemon port - used for lan access
+	iptables -A INPUT -i eth0 -s "${lan_network_item}" -p tcp --dport 58846 -j ACCEPT
+
+	# accept input to privoxy if enabled
+	if [[ $ENABLE_PRIVOXY == "yes" ]]; then
+		iptables -A INPUT -i eth0 -p tcp -s "${lan_network_item}" -d "${docker_network_cidr}" -j ACCEPT
+	fi
+
+done
+
+# accept input icmp (ping)
+iptables -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT
+
+# accept input to local loopback
+iptables -A INPUT -i lo -j ACCEPT
+
+# output iptable rules
+###
+
+# set policy to drop ipv4 for output
+iptables -P OUTPUT DROP
+
+# set policy to drop ipv6 for output
+ip6tables -P OUTPUT DROP 1>&- 2>&-
+
+# accept output from tunnel adapter
+iptables -A OUTPUT -o "${VPN_DEVICE_TYPE}" -j ACCEPT
+
+# accept output to/from docker containers (172.x range is internal dhcp)
+iptables -A OUTPUT -s "${docker_network_cidr}" -d "${docker_network_cidr}" -j ACCEPT
+
+# accept output from vpn gateway
+iptables -A OUTPUT -o eth0 -p $VPN_PROTOCOL --dport $VPN_PORT -j ACCEPT
+
+# if iptable mangle is available (kernel module) then use mark
+if [[ $iptable_mangle_exit_code == 0 ]]; then
+
+	# accept output from deluge webui port 8112 - used for external access
+	iptables -t mangle -A OUTPUT -p tcp --dport 8112 -j MARK --set-mark 1
+	iptables -t mangle -A OUTPUT -p tcp --sport 8112 -j MARK --set-mark 1
+
+fi
+
+# accept output from deluge webui port 8112 - used for lan access
+iptables -A OUTPUT -o eth0 -p tcp --dport 8112 -j ACCEPT
+iptables -A OUTPUT -o eth0 -p tcp --sport 8112 -j ACCEPT
+
+# process lan networks in the list
+for lan_network_item in "${lan_network_list[@]}"; do
+
+	# strip whitespace from start and end of lan_network_item
+	lan_network_item=$(echo "${lan_network_item}" | sed -e 's~^[ \t]*~~;s~[ \t]*$~~')
+
+	# accept output to deluge daemon port - used for lan access
+	iptables -A OUTPUT -o eth0 -d "${lan_network_item}" -p tcp --sport 58846 -j ACCEPT
+
+	# accept output from privoxy if enabled - used for lan access
+	if [[ $ENABLE_PRIVOXY == "yes" ]]; then
+		iptables -A OUTPUT -o eth0 -p tcp -s "${docker_network_cidr}" -d "${lan_network_item}" -j ACCEPT
+	fi
+
+done
+
+# accept output for icmp (ping)
+iptables -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT
+
+# accept output from local loopback adapter
+iptables -A OUTPUT -o lo -j ACCEPT
+
+echo "[info] iptables defined as follows..."
+echo "--------------------"
+iptables -S
+echo "--------------------"