IPv6 Reachability Test Fails on FreeBSD and CenturyLink IPv6
When I run a dual-stack Tor relay on FreeBSD, and use certain ISPs like CenturyLink, I get a warning with the IPv6 reachability test:
Aug 26 13:18:29.000 [notice] Now checking whether IPv6 ORPort [REDACTED]:143 is reachable... (this may take up to 20 minutes -- look for log messages indicating success)
Aug 26 13:21:31.000 [notice] Self-testing indicates your ORPort 1REDACTED:143 is reachable from the outside. Excellent.
Aug 26 13:23:32.000 [notice] Performing bandwidth self-test...done.
Aug 26 13:36:29.000 [notice] Auto-discovered IPv6 address [REDACTED]:143 has not been found reachable. However, IPv4 address is reachable. Publishing server descriptor without IPv6 address.I am able to reach the IPv6 address and port from a VPS.
CenturyLink uses 6rd for IPv6. I could use Comcast, but it's not an option for me (despite being available) since they don't offer symmetrical speeds and cost a lot more, especially since CL gives me fiber and not slow DSL which is good for relays :-).
Google Fiber/Webpass does not have this issue (despite the same torrc) since Webpass has native v6, but they aren't in my new address.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information