VyOS Tunnelbroker.net IPv6

This guides walks through the setup of Tunnelbroker.net for an IPv6 Tunnel.

Prerequisites

  • A public IP address. This does not necessarily need to be static, but you will need to update the tunnel endpoint when/if your IP address changes, which can be done with a script and a scheduled task.

  • An account at Tunnelbroker.net.

  • Requested a “Regular Tunnel”. You want to choose a location that is closest to your physical location for the best response time.

Setting up the initial tunnel

  • Set up the initial IPv6 tunnel. Replace the field below from the fields on the Tunnelbroker.net tunnel information page.

conf
set interfaces tunnel tun0 address Client_IPv6_from_Tunnelbroker    # This will be your VyOS install's public IPv6 address
set interfaces tunnel tun0 description 'HE.NET IPv6 Tunnel'
set interfaces tunnel tun0 encapsulation 'sit'
set interfaces tunnel tun0 local-ip Client_IPv4_from_Tunnelbroker   # This is your public IP
set interfaces tunnel tun0 mtu '1472'
set interfaces tunnel tun0 multicast 'disable'
set interfaces tunnel tun0 remote-ip Server_IPv4_from_Tunnelbroker  # This is the IP of the Tunnelbroker server
set protocols static interface-route6 ::/0 next-hop-interface tun0  # Tell all traffic to go over this tunnel
commit

  • If your WAN connection is over PPPoE, you may need to set the MTU on the above tunnel lower than 1472.

  • At this point you should be able to ping an IPv6 address. Try pinging Google:

ping6 -c2 2001:4860:4860::8888

64 bytes from 2001:4860:4860::8888: icmp_seq=1 ttl=57 time=21.7 ms
64 bytes from 2001:4860:4860::8888: icmp_seq=2 ttl=57 time=21.1 ms

--- 2001:4860:4860::8888 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 21.193/21.459/21.726/0.304 ms

  • Assuming the pings are successful, you need to add some DNS servers. Some options:

set system name-server 2001:4860:4860::8888  # Google
set system name-server 2001:4860:4860::8844  # Google
set system name-server 2606:4700:4700::1111  # Cloudflare
set system name-server 2606:4700:4700::1001  # Cloudflare
commit

  • You should now be able to ping something by IPv6 DNS name:

# ping6 -c2 one.one.one.one
PING one.one.one.one(one.one.one.one) 56 data bytes
64 bytes from one.one.one.one: icmp_seq=1 ttl=58 time=16.8 ms
64 bytes from one.one.one.one: icmp_seq=2 ttl=58 time=17.4 ms

--- one.one.one.one ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 16.880/17.153/17.426/0.273 ms

  • Assuming everything works, you can proceed to client configuration

LAN Configuration

At this point your VyOS install should have full IPv6, but now your LAN devices need access.

With Tunnelbroker.net, you have two options:

  • Routed /64. This is the default assignment. In IPv6-land, it’s good for a single “LAN”, and is somewhat equivalent to a /24. Example: 2001:470:xxxx:xxxx::/64

  • Routed /48. This is something you can request by clicking the “Assign /48” link in the Tunnelbroker.net tunnel config. It allows you to have up to 65k LANs. Example: 2001:470:xxxx::/48

Unlike IPv4, IPv6 is really not designed to be broken up smaller than /64. So if you ever want to have multiple LANs, VLANs, DMZ, etc, you’ll want to ignore the assigned /64, and request the /48 and use that.

Single LAN Setup

Single LAN setup where eth1 is your LAN interface. Use the /64 (all the xxxx should be replaced with the information from your Routed /64 tunnel):

set interfaces ethernet eth1 address '2001:470:xxxx:xxxx::1/64'
set interfaces ethernet eth1 ipv6 router-advert name-server '2001:4860:4860::8888'
set interfaces ethernet eth1 ipv6 router-advert name-server '2001:4860:4860::8844'
set interfaces ethernet eth1 ipv6 router-advert prefix 2001:470:xxxx:xxxx::/64 autonomous-flag 'true'
set interfaces ethernet eth1 ipv6 router-advert prefix 2001:470:xxxx:xxxx::/64 on-link-flag 'true'
set interfaces ethernet eth1 ipv6 router-advert prefix 2001:470:xxxx:xxxx::/64 valid-lifetime '2592000'

  • This accomplishes a few things:

    • Sets your LAN interface’s IP address

    • Enables router advertisements. This is an IPv6 alternative for DHCP (though DHCPv6 can still be used). With RAs, Your devices will automatically find the information they need for routing and DNS.

Multiple LAN/DMZ Setup

In this, you use the Routed /48 information. This allows you to assign a different /64 to every interface, LAN, or even device. Or you could break your network into smaller chunks like /56 or /60.

The format of these addresses:

  • 2001:470:xxxx::/48: The whole subnet. xxxx should come from Tunnelbroker.

  • 2001:470:xxxx:1::/64: A subnet suitable for a LAN

  • 2001:470:xxxx:2::/64: Another subnet

  • 2001:470:xxxx:ffff:/64: The last usable /64 subnet.

In the above examples, 1,2,ffff are all chosen by you. You can use 1-ffff (1-65535).

So, when your LAN is eth1, your DMZ is eth2, your cameras live on eth3, etc:

set interfaces ethernet eth1 address '2001:470:xxxx:1::1/64'
set interfaces ethernet eth1 ipv6 router-advert name-server '2001:4860:4860::8888'
set interfaces ethernet eth1 ipv6 router-advert name-server '2001:4860:4860::8844'
set interfaces ethernet eth1 ipv6 router-advert prefix 2001:470:xxxx:1::/64 autonomous-flag 'true'
set interfaces ethernet eth1 ipv6 router-advert prefix 2001:470:xxxx:1::/64 on-link-flag 'true'
set interfaces ethernet eth1 ipv6 router-advert prefix 2001:470:xxxx:1::/64 valid-lifetime '2592000'

set interfaces ethernet eth2 address '2001:470:xxxx:2::1/64'
set interfaces ethernet eth2 ipv6 router-advert name-server '2001:4860:4860::8888'
set interfaces ethernet eth2 ipv6 router-advert name-server '2001:4860:4860::8844'
set interfaces ethernet eth2 ipv6 router-advert prefix 2001:470:xxxx:2::/64 autonomous-flag 'true'
set interfaces ethernet eth2 ipv6 router-advert prefix 2001:470:xxxx:2::/64 on-link-flag 'true'
set interfaces ethernet eth2 ipv6 router-advert prefix 2001:470:xxxx:2::/64 valid-lifetime '2592000'

set interfaces ethernet eth3 address '2001:470:xxxx:3::1/64'
set interfaces ethernet eth3 ipv6 router-advert name-server '2001:4860:4860::8888'
set interfaces ethernet eth3 ipv6 router-advert name-server '2001:4860:4860::8844'
set interfaces ethernet eth3 ipv6 router-advert prefix 2001:470:xxxx:3::/64 autonomous-flag 'true'
set interfaces ethernet eth3 ipv6 router-advert prefix 2001:470:xxxx:3::/64 on-link-flag 'true'
set interfaces ethernet eth3 ipv6 router-advert prefix 2001:470:xxxx:3::/64 valid-lifetime '2592000'

Firewall

Finally, don’t forget the Firewall. The usage is identical, except for instead of set firewall name NAME, you would use set firewall ipv6-name NAME.

Similarly, to attach the firewall, you would use set interfaces ethernet eth0 firewall in ipv6-name or set zone-policy zone LOCAL from WAN firewall ipv6-name