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comfreak
Asked: 2018-08-12 23:47:37 +0800 CST

Configure LAN for IPv6 with SLAAC on WAN

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My ISP assigns me an IPv4 address via DHCP and an IPv6 subnet through SLAAC.

I set up my pfSense box to use NAT and DHCPv4 for my LAN network which works fine. However, on the IPv6 side, my LAN computers only configure themselves with the standard link-local fe80.. address and don't get any global IPv6 address from the /64 pool my ISP assigned me.

I am fairly new to IPv6, so I tried a few options in pfSense like setting the LAN interface to SLAAC as well or setting it to a static IPv6 in the fc00.. range and enabling DHCPv6. Both of which didn't work for me. Also none of the options in the router advertisement tab helped either.

I'd be happy if someone with experience in setting up pfSense for my scenario could give me a hint to how I need to configure it.

dhcp

1 Answers

  1. The pfSense box should be seeing the ICMPv6 Router Advisory packets coming from your ISP's router over IPv6 multicast to ff02::1. If your pfSense should act as an IPv6 bridge, then it should pass these packets on to your local network, as the Router Advisory packets are essential for IPv6 and SLAAC.

    If you are setting up your pfSense as an IPv6 router instead, then you should configure pfSense to send its own IPv6 Router Advisory messages to your LAN side.

    The ICMPv6 Router Advisory messages are mandatory for IPv6 to work: they also carry information on whether or not DHCPv6 should be used in the network segment, and if so, whether it should be used for IPv6 address allocation or just for additional configuration information. The Router Advisory messages can even carry information on IPv6 DNS servers that the clients should use.

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