I noticed "emerge --sync" connections failing when it chose a particular IPv6 address and I tracked it down. Long ago, bug 282132 added mirrors.rit.edu as a gentoo source and rsync mirror with DNS alias rsync5.us.gentoo.org. It appears still operational and in sync and it's listed on the Gentoo source mirrors web page. It's not listed on the Gentoo rsync mirrors web page (https://www.gentoo.org/support/rsync-mirrors/). Please add it to that web page if there's no reason not to. Also, the IPv6 address in the rsync5.us.gentoo.org DNS alias is out of date. Connections to it get no response. A DNS lookup for mirrors.rit.edu returns the same IPv4 address but a different IPV6 address, and rsync connections to that IPv6 address work. $ host rsync5.us.gentoo.org rsync5.us.gentoo.org has address 129.21.171.72 rsync5.us.gentoo.org has IPv6 address 2620:8d:8000:15:225:90ff:fefd:344c $ host mirrors.rit.edu mirrors.rit.edu is an alias for zuul.rc.rit.edu. zuul.rc.rit.edu has address 129.21.171.72 zuul.rc.rit.edu has IPv6 address 2620:8d:8000:15:1ead:ed:c0:ffe Please update the IPv6 address in the rsync5.us.gentoo.org DNS record. Reproducible: Always
