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