Comcast IPv6 redux
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Re: How to setup IPv6 for Comcast or similar ISP?
Following the instructions in the referenced post caused my pfSense to stop working completely, not even responding to pings on the LAN interface, so clearly the post needs updating. Luckily I was able to revert to a previous working config from the console.
Google isn't helpful as every "how to set up IPv6 for Comcast" gives different and/or incomplete/conflicting instructions, and on 2.7.2 I don't see some of the specified configuration options (Debug (for DHCPv6), Do not allow PD/Address release).
Also, even though the firewall receives a routable IPv6 address itself, it doesn't receive any DNS servers from Comcast.
Is there a canonical update for Comcast IPv6?
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@jhg Do you have your own modem or are you NATting through theirs?
With my own modem (public IP on pfSense) I didn't have to do anything special that I can recall.
WAN is set to DHCP6. DNS uses pfSense by default unless you add custom ones, so no need to add those. My RA mode is set to Assisted. My IPv4 and IPv6 gateways are set to Automatic. Pretty sure everything else is defaults.
I have System/General Setup set to use Quad9 DNS and have forwarding enabled but that shouldn't be necessary. Technically IPv6 DNS servers are not necessary as long as DNS is working.
LAN should have a default IPv6-to-any allow rule.
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@SteveITS I seem to have gotten it to work, but I'm not quite sure how. I'll download the old pre-v6 and current configs and diff them.
And, BTW I have a modem-only connection (non-Xfinity device) without any routing or NAT. pfSense runs on a Zotac CI323-nano mini-pc.