Gentoo Infrastructure is not reachable over IPv6. Reproducible: Always Steps to Reproduce: ~ $ host gentoo.org gentoo.org has address 89.16.167.134 gentoo.org mail is handled by 10 mail.gentoo.org. ~ $ host bugs.gentoo.org bugs.gentoo.org is an alias for bugs-lb.gentoo.org. bugs-lb.gentoo.org has address 94.100.119.170 ... Expected Results: ~ $ host gentoo.org gentoo.org has address 89.16.167.134 gentoo.org has IPv6 address 2001:db8::dead:beef gentoo.org mail is handled by 10 mail.gentoo.org. ~ $ host bugs.gentoo.org bugs.gentoo.org is an alias for bugs-lb.gentoo.org. bugs-lb.gentoo.org has address 94.100.119.170 bugs-lb.gentoo.org has IPv6 address 2001:db8::c001:d00d ...
There are some services available via IPv6 already, and we're expanding the coverage as soon as more of our upstream providers offer v6 connectivity. http://www.gentoo.org/proj/en/infrastructure/server-specs.xml lists the host with IPv6 connectivity and will be updated as more services become available via IPv6.