[CentOS-mirror] New mirror in Switzerland

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> Well, so does that mean that your backend mirror has no ipv4 
> connectivity at all ? (for outgoing connections that is), or is
> that the one from the frontend that is used for outgoing
> connections (and so that needs to be allowed) ?

Correct the backend has no IPv4 connectivity.

[root at mirror ~]# ip a sh eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP qlen 1000
    link/ether 52:54:00:77:b4:10 brd ff:ff:ff:ff:ff:ff
    inet6 2a02:168:7a0e:6:5054:ff:fe77:b410/64 scope global
noprefixroute dynamic
       valid_lft 86347sec preferred_lft 14347sec
    inet6 fe80::5054:ff:fe77:b410/64 scope link
       valid_lft forever preferred_lft forever

The fronted IPs are served via a DNS CNAME and might be changed due to
infrastructure flexibility.

PS.: If you can provide a username/password rsync access, I can move
the backend into a mixed IPv4/IPv6 network. (NAT private IPv4 RC1918 /
IPv6)
The IPv6 address would change then.

Do you have any other idea? Maybe it is not mandatory (until IPv6 is
available) to have a direct connection to our msync network?
May I host the first msync IPv6 for Europe?

> Problem is that actually nodes in our msync network only have ipv4 
> (something I'd like to change, but you'd be surprised how many DC
> don't provide ipv6)

It should really be changed _asap_. IPv6 was codified 1st of December
1995 in RFC1883. This is over _20_ years ago.
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