Re: Fedora 34 dns resolution problems?

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On Sun, 2021-01-03 at 11:54 +0800, Ed Greshko wrote:
> On 03/01/2021 06:30, Michael H. Warfield wrote:
> > [mhw@rpi-plate ~]$ ping mirrors.fedoraproject.org
> > ping: mirrors.fedoraproject.org: Name or service not known
> > [mhw@rpi-plate ~]$ ping6 mirrors.fedoraproject.org
> > ping6: mirrors.fedoraproject.org: Name or service not known
> 
> Just a note here.
> 
> If you do have IPv6 service, those addresses will be preferred over
> IPv4.  See man gai.conf.
> One would have to do "ping -4" to differentiate.

Note, I did try "ping6" to differentiate.  Even though there was an
IPv6 address, it still failed with "unknown host or service".

> [egreshko@meimei ~]$ ping -c 1 mirrors.fedoraproject.org
> PING mirrors.fedoraproject.org(proxy06.fedoraproject.org
> (2605:bc80:3010:600:dead:beef:cafe:fed9)) 56 data bytes
> 64 bytes from proxy06.fedoraproject.org
> (2605:bc80:3010:600:dead:beef:cafe:fed9): icmp_seq=1 ttl=53 time=148
> ms

> [egreshko@meimei ~]$ ping -4 -c 1 mirrors.fedoraproject.org
> PING  (8.43.85.67) 56(84) bytes of data.
> 64 bytes from proxy14.fedoraproject.org (8.43.85.67): icmp_seq=1
> ttl=42 time=199 ms

Right now, "Slide" and "Rpi-Plate" are communicating...  Both work...
 I'm fully IPv6 enabled.  I'll have to wait a day or so till the
faceplant again.

[root@slide eero]# ping -4 mirrors.fedoraproject.org
PING  (140.211.169.206) 56(84) bytes of data.
64 bytes from proxy09.fedoraproject.org (140.211.169.206): icmp_seq=1 ttl=48 time=98.2 ms
64 bytes from proxy09.fedoraproject.org (140.211.169.206): icmp_seq=2 ttl=48 time=97.6 ms
^C
---  ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 97.601/97.882/98.164/0.281 ms
[root@slide eero]# ping mirrors.fedoraproject.org
PING mirrors.fedoraproject.org(2620:52:3:1:dead:beef:cafe:fed6 (2620:52:3:1:dead:beef:cafe:fed6)) 56 data bytes
64 bytes from 2620:52:3:1:dead:beef:cafe:fed6 (2620:52:3:1:dead:beef:cafe:fed6): icmp_seq=1 ttl=53 time=63.9 ms
64 bytes from 2620:52:3:1:dead:beef:cafe:fed6 (2620:52:3:1:dead:beef:cafe:fed6): icmp_seq=2 ttl=53 time=38.0 ms
^C
--- mirrors.fedoraproject.org ping statistics ---
3 packets transmitted, 2 received, 33.3333% packet loss, time 2003ms
rtt min/avg/max/mdev = 38.016/50.936/63.856/12.920 ms


> ---
> The key to getting good answers is to ask good questions.

Regards,
Mike
-- 
Michael H. Warfield (AI4NB) | (o) +1 706 850-8773 |  mhw@xxxxxxxxxxxx
   /\/\|=mhw=|\/\/          | (c) +1 678 463-0932 |  http://www.wittsend.com/mhw/
ARIN whois: MHW9-ARIN       | An optimist believes we live in the best of all
PGP Key: 0xC0EB9675674627FF | possible worlds.  A pessimist is sure of it!

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