Hi!
Our mirror centos.ip-connect.vn.ua -- from start and to now -- IPv6-ready mirror.
$ host centos.ip-connect.vn.ua centos.ip-connect.vn.ua has address 91.236.251.12 centos.ip-connect.vn.ua has address 91.236.251.62 centos.ip-connect.vn.ua has address 91.218.89.74 centos.ip-connect.vn.ua has IPv6 address 2001:67c:440:401::14:12
When using an IPv4 proto, mirrorlist like:
$ curl -4v 'http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os' * About to connect() to mirrorlist.centos.org port 80 (#0) * Trying 67.219.148.138... * Connected to mirrorlist.centos.org (67.219.148.138) port 80 (#0)
GET /?release=7&arch=x86_64&repo=os HTTP/1.1 User-Agent: curl/7.29.0 Host: mirrorlist.centos.org Accept: */*
< HTTP/1.1 200 OK < Date: Mon, 21 Nov 2016 09:31:24 GMT < Server: PasteWSGIServer/0.5 Python/2.7.5 < Content-Length: 531 < Content-Type: text/plain; charset=UTF-8 < http://centos.ip-connect.vn.ua/7.2.1511/os/x86_64/ http://mirror.omnilance.com/centos/7.2.1511/os/x86_64/ http://centos.itt-consulting.com/7.2.1511/os/x86_64/ http://ftp.colocall.net/pub/centos/7.2.1511/os/x86_64/ http://mirror.mirohost.net/centos/7.2.1511/os/x86_64/ http://mirror.besthosting.ua/7.2.1511/os/x86_64/ http://centos.slaskdatacenter.com/7.2.1511/os/x86_64/ ftp://ftp.man.szczecin.pl/pub/Linux/centos/7.2.1511/os/x86_64/ http://ftp.pbone.net/pub/centos/7.2.1511/os/x86_64/ http://centos.komster.pl/7.2.1511/os/x86_64/
^^^^ Here our mirror on list and preffered.
But, when using IPv6 (always preffered when enabled), mirrorlist like:
curl -6v 'http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os' * About to connect() to mirrorlist.centos.org port 80 (#0) * Trying 2001:1b48:203::4:10... * Connected to mirrorlist.centos.org (2001:1b48:203::4:10) port 80 (#0)
GET /?release=7&arch=x86_64&repo=os HTTP/1.1 User-Agent: curl/7.29.0 Host: mirrorlist.centos.org Accept: */*
< HTTP/1.1 200 OK < Date: Mon, 21 Nov 2016 09:32:30 GMT < Server: PasteWSGIServer/0.5 Python/2.7.5 < Content-Length: 487 < Content-Type: text/plain; charset=UTF-8 < http://ftp.colocall.net/pub/centos/7/os/x86_64/ http://mirror.omnilance.com/centos/7/os/x86_64/ http://mirror.as24220.net/pub/centos/7/os/x86_64/ http://mirror.us.leaseweb.net/centos/7/os/x86_64/ ftp://ftp.free.fr/mirrors/ftp.centos.org/7/os/x86_64/ ftp://mirror.bytemark.co.uk/centos/7/os/x86_64/ http://mirror.centos.org/centos/7/os/x86_64/ http://ftp.jaist.ac.jp/pub/Linux/CentOS/7/os/x86_64/ ftp://mirror.vtti.vt.edu/centos/7/os/x86_64/ http://mirrors.coreix.net/centos/7/os/x86_64/
^^^^ Here none our mirror.
So, our mirror not present in mirrorlist only for IPv6-clients.
Please, fix this issue.
Thanks!