Router:Ubiquiti EdgeRouter Lite

The Ubiquiti EdgeMAX ERLite-3 (EdgeRouter Lite 3) can be used as a router (with a suitable modem) with A&A's services. The router is based on a dual-core MIPS64 processor and runs a Linux distribution called EdgeOS which uses a configuration system forked from Vyatta with a web-based interface on top.

You'll need

• a PPPoE ADSL or FTTC modem, or a fibre ONT (for FTTP). A&A's supplied modems & routers can be configured into a bridge mode for this.

Basic Automatic Configuration

As of recent firmware versions (at least since v1.9.7-hotfix.4) you can almost achieve a working configuration just by using the Basic Setup wizard in the router's web interface, but there are currently a couple of extra configuration changes you have to do manually to fix IPv6 support.

• Connect a computer to the router, access its web interface and start the Basic Setup wizard. Set the 'Internet connection type' option to PPPoE and give it the PPP username and password of your A&A line. Enable the DHCPv6 PD option (which allows for almost entirely automatic configuration of IPv6) and set the IPv6 prefix length that you have set up for your line on the A&A control pages (if you're not sure, it would normally be /64 by default):

• Configure the rest of the Basic Settings Wizard settings however you like or leave them as the defaults.

• Finish the wizard and reboot. Connect your PPPoE modem to the eth0 port on the router, and your LAN to the eth1 port (to match the conventions used by the setup wizard). You should now have a working IPv4 internet connection.

• The two things that need to be done to fix IPv6 support are enabling the IPv6 option for the PPPoE connection, and setting up a default route to use the PPPoE interface because an IPv6 route doesn't get added by default when the connection is established. To add those settings enter the router's command-line interface either by using the CLI button on the web interface or using SSH and then enter the following commands:

configure
set interfaces ethernet eth0 pppoe 0 ipv6 enable
set protocols static interface-route6 ::/0 next-hop-interface pppoe0
commit
save
exit

• You don't need to reboot for the changes to take effect and your PPP session should reconnect and come back up with IPv6 configured and working.

Other configuration options

Enabling a 1500 MTU

To enable 1500 MTU if you know that your modem can support baby jumbo frames:

configure
set interfaces ethernet eth0 pppoe 0 mtu 1500
set interfaces ethernet eth0 mtu 1508
delete firewall options mss-clamp
commit
save
exit

Enabling UPnP/NAT-PMP/PCP

UPnP, NAT-PMP & PCP are protocols that allow devices behind your router to automatically forward ports.

This can be useful to allow devices such as games consoles to work more easily, but it does have security implications as it allows programs to open holes in your firewall.

To enable the MiniUPnP server to allow local clients to forward ports using UPnP/NAT-PMP/PCP:

configure
set service upnp2 listen-on eth1
set service upnp2 nat-pmp enable
set service upnp2 secure-mode enable
set service upnp2 wan pppoe0
commit
save
exit

Hardware offloading

To enable as much hardware offloading as possible ("Note: It is currently not possible to enable IPv6 offloading for PPPoE and VLANs simultaneously."):

configure
set system offload ipv4 forwarding enable
set system offload ipv4 gre enable
set system offload ipv4 pppoe enable
set system offload ipv4 vlan enable
set system offload ipsec enable
set system offload ipv6 forwarding enable
set system offload ipv6 pppoe enable
set system offload ipv6 vlan disable
commit
save
exit

Manual configuration

If you're running an older version of EdgeOS or if you prefer to configure your router manually rather than using the setup wizard, you can also use a configuration like the following.

Don't just blindly copy & paste this whole configuration! Pay attention to the comments (lines starting with #) - they give a basic overview of what each section does.

You'll need to change the IPv6 addresses in this configuration to match the ones shown for you on the control pages, and add your username and password.

Depending on the modem you are using, you may also need to make the changes listed in the comments for a lower MTU.

# Network interface configuration
# eth0 - the WAN interface
# You'll need to reduce the MTU to 1500 if you don't have a modem that allows you to use baby jumbos
set interfaces ethernet eth0 description 'Ethernet interface for PPPoE'
set interfaces ethernet eth0 duplex auto
set interfaces ethernet eth0 mtu 1508
set interfaces ethernet eth0 speed auto

# eth1 - the LAN interface
set interfaces ethernet eth1 description 'Local LAN interface'
set interfaces ethernet eth1 address 192.168.0.1/24
set interfaces ethernet eth1 address '2001:8b0:db8:1234::1/64'
set interfaces ethernet eth1 duplex auto
set interfaces ethernet eth1 ipv6 dup-addr-detect-transmits 1
set interfaces ethernet eth1 speed auto

# IPv6 SLAAC configuration - this will hand out IP addresses to your local LAN
set interfaces ethernet eth1 ipv6 router-advert cur-hop-limit 64
set interfaces ethernet eth1 ipv6 router-advert link-mtu 0
set interfaces ethernet eth1 ipv6 router-advert managed-flag false
set interfaces ethernet eth1 ipv6 router-advert max-interval 600
set interfaces ethernet eth1 ipv6 router-advert name-server '2001:8b0:db8:1234::1'
set interfaces ethernet eth1 ipv6 router-advert other-config-flag false
set interfaces ethernet eth1 ipv6 router-advert prefix '2001:8b0:db8:1234::/64' autonomous-flag true
set interfaces ethernet eth1 ipv6 router-advert prefix '2001:8b0:db8:1234::/64' on-link-flag true
set interfaces ethernet eth1 ipv6 router-advert prefix '2001:8b0:db8:1234::/64' valid-lifetime 2592000
set interfaces ethernet eth1 ipv6 router-advert reachable-time 0
set interfaces ethernet eth1 ipv6 router-advert retrans-timer 0
set interfaces ethernet eth1 ipv6 router-advert send-advert true

# eth2 is unused!
set interfaces ethernet eth2 duplex auto
set interfaces ethernet eth2 speed auto

set interfaces loopback lo

# PPPoE configuration - this is your connection to A&A
# You'll need to reduce the MTU to 1492 if you don't have a modem that allows you to use baby jumbos
# You'll also need to add your connection username & password on the user-id and password lines
set interfaces ethernet eth0 pppoe 0 default-route force
set interfaces ethernet eth0 pppoe 0 ipv6 dup-addr-detect-transmits 1
set interfaces ethernet eth0 pppoe 0 ipv6 enable
set interfaces ethernet eth0 pppoe 0 mtu 1500
set interfaces ethernet eth0 pppoe 0 name-server auto
set interfaces ethernet eth0 pppoe 0 password 'your password here'
set interfaces ethernet eth0 pppoe 0 user-id 'your username here'

# Add a default route for IPv6 traffic (this lets you access the internet over IPv6!)
set protocols static interface-route6 '::/0' next-hop-interface pppoe0

# A few basic firewall settings
set firewall all-ping enable
set firewall broadcast-ping disable
set firewall ipv6-receive-redirects disable
set firewall ipv6-src-route disable
set firewall ip-src-route disable
set firewall log-martians enable
set firewall receive-redirects disable
set firewall send-redirects enable
set firewall source-validation disable
set firewall syn-cookies enable

# Add some firewall groups that'll be useful for creating firewall rules
set firewall group ipv6-network-group LAN-v6 ipv6-network '2001:8b0:db8:1234::/64'
set firewall group network-group LAN-v4 network 192.168.0.0/24

# internet_in-v6 is for traffic from the internet to the local LAN
set firewall ipv6-name internet_in-v6 default-action reject

set firewall ipv6-name internet_in-v6 rule 1 description 'Allow incoming ICMP'
set firewall ipv6-name internet_in-v6 rule 1 action accept
set firewall ipv6-name internet_in-v6 rule 1 protocol icmp

set firewall ipv6-name internet_in-v6 rule 9999 description 'Allow return traffic for established and related connections'
set firewall ipv6-name internet_in-v6 rule 9999 action accept
set firewall ipv6-name internet_in-v6 rule 9999 state established enable
set firewall ipv6-name internet_in-v6 rule 9999 state related enable

# local-v6 is for traffic from all sources to the router itself
set firewall ipv6-name local-v6 default-action reject

set firewall ipv6-name local-v6 rule 1 description 'Allow incoming ICMP'
set firewall ipv6-name local-v6 rule 1 action accept
set firewall ipv6-name local-v6 rule 1 protocol ipv6-icmp

set firewall ipv6-name local-v6 rule 2 description 'Allow connections from the LAN'
set firewall ipv6-name local-v6 rule 2 action accept
set firewall ipv6-name local-v6 rule 2 source group ipv6-network-group LAN-v6

set firewall ipv6-name local-v6 rule 9999 description 'Allow return traffic for established and related connections'
set firewall ipv6-name local-v6 rule 9999 action accept
set firewall ipv6-name local-v6 rule 9999 state established enable
set firewall ipv6-name local-v6 rule 9999 state related enable

# internet_in-v4 is for traffic from the internet to the local LAN
set firewall name internet_in-v4 default-action reject

set firewall name internet_in-v4 rule 1 description 'Allow incoming ICMP'
set firewall name internet_in-v4 rule 1 action accept
set firewall name internet_in-v4 rule 1 protocol icmp

set firewall name internet_in-v4 rule 9999 description 'Allow return traffic for established and related connections'
set firewall name internet_in-v4 rule 9999 action accept
set firewall name internet_in-v4 rule 9999 state established enable
set firewall name internet_in-v4 rule 9999 state related enable

# local-v4 is for traffic from all sources to the router itself
set firewall name local-v4 default-action reject

set firewall name local-v4 rule 1 description 'Allow incoming ICMP'
set firewall name local-v4 rule 1 action accept
set firewall name local-v4 rule 1 protocol icmp

set firewall name local-v4 rule 2 description 'Allow connections from the LAN'
set firewall name local-v4 rule 2 action accept
set firewall name local-v4 rule 2 source group network-group LAN-v4

set firewall name local-v4 rule 9999 description 'Allow return traffic for established and related connections'
set firewall name local-v4 rule 9999 action accept
set firewall name local-v4 rule 9999 state established enable
set firewall name local-v4 rule 9999 state related enable

# Optionally clamp the TCP MSS size to cope with smaller MTUs
# These lines are commented out by default, but you'll need to use them if your modem doesn't support baby jumbos
# set firewall options mss-clamp interface-type pppoe
# set firewall options mss-clamp mss 1452

# Assign firewall rule sets to network interfaces
set interfaces ethernet eth1 firewall local ipv6-name local-v6
set interfaces ethernet eth1 firewall local name local-v4
set interfaces ethernet eth0 pppoe 0 firewall in ipv6-name internet_in-v6
set interfaces ethernet eth0 pppoe 0 firewall in name internet_in-v4
set interfaces ethernet eth0 pppoe 0 firewall local ipv6-name local-v6
set interfaces ethernet eth0 pppoe 0 firewall local name local-v4

# Enable internal DHCP
set service dhcp-server disabled false
set service dhcp-server hostfile-update disable
set service dhcp-server shared-network-name LAN authoritative enable
set service dhcp-server shared-network-name LAN subnet 192.168.0.0/24 default-router 192.168.0.1
set service dhcp-server shared-network-name LAN subnet 192.168.0.0/24 dns-server 192.168.0.1
set service dhcp-server shared-network-name LAN subnet 192.168.0.0/24 lease 86400
set service dhcp-server shared-network-name LAN subnet 192.168.0.0/24 start 192.168.0.100 stop 192.168.0.149
set service dhcp-server use-dnsmasq disable

# Enable internal DNS
set service dns forwarding cache-size 150
set service dns forwarding listen-on eth1

# Limit the web GUI to listening on your LAN only
set service gui http-port 80
set service gui https-port 443
set service gui listen-address 192.168.0.1
set service gui older-ciphers enable

# Limit the SSH server to listening on your LAN only
set service ssh listen-address 192.168.0.1
set service ssh listen-address '2001:8b0:db8:1234::1'

# Handle NAT for the internet connection
set service nat rule 5999 outbound-interface pppoe0
set service nat rule 5999 source address 192.168.0.0/24
set service nat rule 5999 type masquerade

# These offload settings are the best compromise from my personal experience
# as PPPoE download speeds are generally low enough on A&A connections to not need hardware acceleration
# If you don't use VLANs internally, you might enable ipv6 pppoe offload and disable ipv6 vlan offload for better IPv6 download performance
# as you can only have one of those two enabled at once
set system offload hwnat disable
set system offload ipsec enable
set system offload ipv4 forwarding enable
set system offload ipv4 pppoe enable
set system offload ipv4 vlan enable
set system offload ipv6 forwarding enable
set system offload ipv6 pppoe disable
set system offload ipv6 vlan enable

# Set up QoS to keep your internet connection usable when doing lots of traffic
# You'll need to adjust the upload rate based on your connection's upload sync rate
set traffic-control smart-queue wan-qos upload rate 20mbit
set traffic-control smart-queue wan-qos wan-interface pppoe0

Useful commands

To check the PPP log:

tail -f /var/log/vyatta/ppp_pppoe0.log

To disconnect/connect PPP manually:

disconnect interface pppoe0
connect interface pppoe0

To inspect the ports that have been opened for UPnP/NAT-PMP/PCP (this only works when using the 'upnp2' configuration option rather than the older 'upnp' option which uses a different server):

show upnp2 rules