OpenWRT configurations to run OpenVPN client | Private Internet Access - https://www.privateinternetaccess.com

OpenWRT | OpenVPN | PIA - README.md

This gist contains all the OpenWRT configuraion files needed to connect to Private Internet Access (PIA) VPN servers. The following files are included:

• network: contains configuration to add a virtual network device (i.e. tun1366) and custom DNS servers
• openvpn: OpenVPN configuration file to connect to PIA VPN servers
• firewall: firewall configuration which passes all traffic through VPN and rejects any request when OpenVPN is down

NOTE: there are a number of other files required to be available under /etc/openvpn for this approach to work:

• pia.auth: VPN credentials in two lines, first the username and the second the password
• pia.ca.crt: certificate authority file
• pia.crl.pem: certificate revocation list

For PIA the last two files can be downloaded here: https://www.privateinternetaccess.com/openvpn/openvpn.zip

firewall

config defaults
	option synflood_protect	1
	option input		ACCEPT
	option output		ACCEPT
	option forward		REJECT

config zone
	option name		lan
	list   network		'lan'
	option input		ACCEPT
	option output		ACCEPT
	option forward		REJECT

config zone
	option name		wan
	list   network		'wan'
	list   network		'wan6'
	option input		REJECT
	option output		ACCEPT
	option forward		REJECT
	option masq		1
	option mtu_fix		1

config zone 
	option name 		pia
	option network 		'pia'
	option input		REJECT
	option output		ACCEPT
	option forward		REJECT
	option masq		1
	option mtu_fix		1

# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
	option name		Allow-DHCP-Renew
	option src		wan
	option proto		udp
	option dest_port	68
	option target		ACCEPT
	option family		ipv4

# Allow IPv4 ping
config rule
	option name		Allow-Ping
	option src		wan
	option proto		icmp
	option icmp_type	echo-request
	option family		ipv4
	option target		ACCEPT

config rule
	option name		Allow-IGMP
	option src		wan
	option proto		igmp
	option family		ipv4
	option target		ACCEPT

# Allow DHCPv6 replies
# see https://dev.openwrt.org/ticket/10381
config rule
	option name		Allow-DHCPv6
	option src		wan
	option proto		udp
	option src_ip		fe80::/10
	option src_port		547
	option dest_ip		fe80::/10
	option dest_port	546
	option family		ipv6
	option target		ACCEPT

config rule
	option name		Allow-MLD
	option src		wan
	option proto		icmp
	option src_ip		fe80::/10
	list icmp_type		'130/0'
	list icmp_type		'131/0'
	list icmp_type		'132/0'
	list icmp_type		'143/0'
	option family		ipv6
	option target		ACCEPT

# Allow essential incoming IPv6 ICMP traffic
config rule
	option name		Allow-ICMPv6-Input
	option src		wan
	option proto	icmp
	list icmp_type		echo-request
	list icmp_type		echo-reply
	list icmp_type		destination-unreachable
	list icmp_type		packet-too-big
	list icmp_type		time-exceeded
	list icmp_type		bad-header
	list icmp_type		unknown-header-type
	list icmp_type		router-solicitation
	list icmp_type		neighbour-solicitation
	list icmp_type		router-advertisement
	list icmp_type		neighbour-advertisement
	option limit		1000/sec
	option family		ipv6
	option target		ACCEPT

# Allow essential forwarded IPv6 ICMP traffic
config rule
	option name		Allow-ICMPv6-Forward
	option src		wan
	option dest		*
	option proto		icmp
	list icmp_type		echo-request
	list icmp_type		echo-reply
	list icmp_type		destination-unreachable
	list icmp_type		packet-too-big
	list icmp_type		time-exceeded
	list icmp_type		bad-header
	list icmp_type		unknown-header-type
	option limit		1000/sec
	option family		ipv6
	option target		ACCEPT

# include a file with users custom iptables rules
config include
	option path /etc/firewall.user

# allow IPsec/ESP and ISAKMP passthrough
config rule
	option src		wan
	option dest		lan
	option proto		esp
	option target		ACCEPT

config rule
	option src		wan
	option dest		lan
	option dest_port	500
	option proto		udp
	option target		ACCEPT

config forwarding
	option src		lan
	option dest		pia

network

config interface 'loopback'
	option ifname 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'fd38:9c1e:b54f::/48'

config interface 'lan'
	option ifname 'eth0.1'
	option force_link '1'
	option type 'bridge'
	option proto 'static'
	option ipaddr '192.168.2.1'
	option netmask '255.255.255.0'
	option ip6assign '60'
	option peerdns '0'
	list dns '209.222.18.218'
	list dns '209.222.18.222'

config interface 'wan'
	option ifname 'eth0.2'
	option proto 'dhcp'
	option peerdns '0'

config interface 'wan6'
	option ifname 'eth0.2'
	option proto 'dhcpv6'
	option peerdns '0'

config switch
	option name 'switch0'
	option reset '1'
	option enable_vlan '1'

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option ports '0t 2 3 4 5'

config switch_vlan
	option device 'switch0'
	option vlan '2'
	option ports '0t 1'

# OpenVPN interface
config interface 'pia'
	option ifname 'tun1366'
	option proto 'none'

openvpn

config openvpn 'PIA'
	option enabled 1

	# This is an OpenVPN client config
	option client 1

	# Interface
	option dev tun1366

	# Protocol: UDP
	option proto udp

	# Trying indefinitely to resolve server's host name
	option resolve_retry infinite

	# Dont't bind to a specific local port
	option nobind 1
	
	# Try to persist some data over restarts
	option persist_key 1
	option persist_tun 1
	
	# SSL/TLS params
	option ca /etc/openvpn/pia.ca.crt
	option crl_verify /etc/openvpn/pia.crl.pem
	option tls_client 1

	# Enable compression
	option comp_lzo yes

	# Authentication file
	option auth_user_pass /etc/openvpn/pia.auth

	# Set lgging to verbose
	option verb 3

	# Remote servers
	list remote "us-seattle.privateinternetaccess.com 1198"
	list remote "hk.privateinternetaccess.com 1198"
	list remote "uk-london.privateinternetaccess.com 1198"
	list remote "ro.privateinternetaccess.com 1198"
	list remote "nl.privateinternetaccess.com 1198"
	list remote "us-texas.privateinternetaccess.com 1198"
	list remote "in.privateinternetaccess.com 1198"
	list remote "nz.privateinternetaccess.com 1198"
	list remote "us-east.privateinternetaccess.com 1198"
	list remote "ireland.privateinternetaccess.com 1198"
	list remote "sweden.privateinternetaccess.com 1198"
	list remote "japan.privateinternetaccess.com 1198"
	list remote "ca.privateinternetaccess.com 1198"
	list remote "denmark.privateinternetaccess.com 1198"
	list remote "brazil.privateinternetaccess.com 1198"
	list remote "germany.privateinternetaccess.com 1198"
	list remote "aus.privateinternetaccess.com 1198"
	list remote "us-california.privateinternetaccess.com 1198"
	list remote "mexico.privateinternetaccess.com 1198"
	list remote "us-siliconvalley.privateinternetaccess.com 1198"
	list remote "us-midwest.privateinternetaccess.com 1198"
	list remote "us-florida.privateinternetaccess.com 1198"
	list remote "ca-toronto.privateinternetaccess.com 1198"
	list remote "fi.privateinternetaccess.com 1198"
	list remote "uk-southampton.privateinternetaccess.com 1198"
	list remote "france.privateinternetaccess.com 1198"
	list remote "israel.privateinternetaccess.com 1198"
	list remote "us-newyorkcity.privateinternetaccess.com 1198"
	list remote "us-west.privateinternetaccess.com 1198"
	list remote "no.privateinternetaccess.com 1198"
	list remote "italy.privateinternetaccess.com 1198"
	list remote "turkey.privateinternetaccess.com 1198"
	list remote "us-chicago.privateinternetaccess.com 1198"
	list remote "sg.privateinternetaccess.com 1198"
	list remote "swiss.privateinternetaccess.com 1198"
	list remote "aus-melbourne.privateinternetaccess.com 1198"

These files are to be copied under /etc/config.