Solution for dhcp6c problems after hardware change
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Posting this in case it helps somebody having the same problem
Context:
- ISP is Comcast Portland OR, which fully supports IPv6
- Upgraded pfSense hardware from an old Zotac CI323 box to a Beelink EQ12 (for the 2.5Gbe Intel adapters)
- Installed pfSense CE 2.7.2 (same version as on the Zotac box)
- Restored configuration
Results:
- IPv6 connectivity started behaving erratically.
- The dhcp6c transaction looked normal, including an address for the WAN adapter plus a delegated prefix.
- pfSense DHCP6 server gave out addresses with the delegated prefix, and hosts on the LAN could communicate with each other and the firewall over IPv6
- I could send/receive IPv6 traffic from the firewall console but packets originating on the LAN (i.e. with address in the delegated prefix) exited the WAN adapter but disappeared into the ether.
Solution:
The leftover
/var/db/dhcp6c_duid, was the culprit, but I don't know enough about pfSense's dhcp6c client to understand why. I was alerted to its existence from a debug log message from the dhcp6c client. In any event, I deleted the file, rebooted the modem and then pfSense, and everything started working.As always, YMMV.
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Curious. I replaced the computer I originally ran pfSense on a few years ago. Other than changing the interface assignments, it just worked. I'm still using that new computer today. I'm on Rogers and they use a lot of the same hardware as Comcast. The first computer I ran pfSense on was a refurb HP compact computer and when it died I replaced it with the mini PC described in my sig.
