IPv6: 6rd with OpenBSD
Reader David Hill wrote in with an article explaining how to set up 6rd tunneling in OpenBSD:
There are many websites claiming OpenBSD doesn't support 6rd. There are also user-space 6rd implementations that do not work on OpenBSD.
Well, 6rd works just fine with OpenBSD if you do it manually.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump