On 02/06/16 10:23, Sascha Spreitzer wrote:

Hi

From my end (Zurich, CH) of the internet can not reach one of the IPv6 backbone mirrors.

[..] [root@mirror ~]# /usr/bin/rsync -6avzH --delete msync.centos.org::CentOS /var/www/html/centos rsync: failed to connect to msync.centos.org (2001:1af8:4060:a006:223:7dff:feaa:426f): Connection timed out (110) rsync error: error in socket IO (code 10) at clientserver.c(122) [Receiver=3.0.9] [..]

[..] [root@mirror ~]# mtr -nr 2001:1af8:4060:a006:223:7dff:feaa:426f Start: Thu Jun 2 08:20:11 2016 HOST: mirror Loss% Snt Last Avg Best Wrst StDev 1.|-- 2a02:168:7a0e:5::1 0.0% 10 0.2 0.2 0.1 0.2 0.0 2.|-- 2a02:168:2000:1d::1 0.0% 10 0.5 0.6 0.5 0.9 0.0 3.|-- 2001:1620:2::1cd 0.0% 10 0.5 1.7 0.5 12.0 3.5 4.|-- 2001:1620:2::1ad 0.0% 10 0.8 0.7 0.6 1.0 0.0 5.|-- 2001:1620:2::196 0.0% 10 0.7 1.8 0.7 8.0 2.2 6.|-- 2001:1620:2::159 0.0% 10 0.5 2.0 0.5 7.4 2.4 7.|-- 2001:1620:2::c5 0.0% 10 6.1 7.5 0.5 23.1 7.1 8.|-- 2001:1620:2::2b6 0.0% 10 6.0 6.0 5.8 7.6 0.5 9.|-- 2001:1620:2::dd 0.0% 10 16.4 16.5 16.4 17.0 0.0 10.|-- 2001:1620:1000::15e 0.0% 10 19.6 19.9 17.9 21.3 0.9 11.|-- 2a03:2280:38::23 0.0% 10 17.4 17.6 17.4 17.8 0.0 12.|-- 2001:1af8:4060:0:81:17:32 0.0% 10 102.3 45.6 17.2 214.8 65.1 13.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0 [..]

PS.: If in the case that endpoint is firewalled, please mind that ICMPv6 is a vital part of the IPv6 protocol and shall not be dropped but rather be answered accordingly (rejected, prohibited, etc..) This is part of the IPv6 RFC.

Kind regards Sascha

Hi Sacha,

Yes, there was an issue on that node wrt ipv6 connectivity but it will be back with a different address in the dns backend soon. I'm also working on a dynamic backend for the geoip dns setup so that our monitoring solution (zabbix) will be able to remove/add automatically those nodes, based on tests results for ipv4/ipv6 and other potential issues.

Thanks for the report !

Cheers,