Dynamic DNS fails

[Volker Wysk]

Am Montag, den 22.03.2021, 08:15 +0100 schrieb Bo Berglund:
> On Fri, 19 Mar 2021 14:03:58 +0100, Volker Wysk <post at volker-wysk.de> wrote:
> 
> > Hello
> > 
> > After a day, it suddenly works again. Without me doing anything. 
> > 
> > This makes me think again, that it was probably a problem with the name
> > server of the dyndns provider (now-dns.com).
> 
> Not working properly here:
> 
> Windows:
> --------
> ping vwysk.now-dns.net
> Ping request could not find host vwysk.now-dns.net. Please check the name and
> try again.
> 
> Raspberry Pi:
> -------------
> $ ping vwysk.now-dns.net
> ping: vwysk.now-dns.net: Temporary failure in name resolution

That was some four hours ago. At the moment, it works for me.

It's funny. For a few days now, it fails for a day, then it works for a day,
then it fails again... and so on.


> Ubuntu:
> -------
> $ ping vwysk.now-dns.net
> ... waiting like a minute or so ...
> PING vwysk.now-dns.net (79.210.28.81) 56(84) bytes of data.
> 64 bytes from p4fd21c51.dip0.t-ipconnect.de (79.210.28.81): icmp_seq=1 ttl=47
> time=34.7 ms

So maybe the problem is, that some name servers aren't down but very slow?


> Finally checked with tracert on Windows:
> ----------------------------------------
> tracert vwysk.now-dns.net
> 
> Tracing route to vwysk.now-dns.net [79.210.28.81]
> over a maximum of 30 hops:
> 
>   1     1 ms     1 ms     1 ms  asus-main [192.168.119.1]
>   2     2 ms     1 ms     1 ms  gw5.a465.priv.bahnhof.se [46.59.126.129]
>   3    29 ms     3 ms     3 ms  172.16.0.231
>   4    13 ms     2 ms     9 ms  a465-gw-c.bahnhof.net [46.59.118.179]
>   5     2 ms     2 ms     2 ms  a465-gw.bahnhof.net [46.59.118.178]
>   6     2 ms     2 ms     2 ms  sto-ste-er1.sto-cr1.bahnhof.net [46.59.112.42]
>   7    14 ms     3 ms     4 ms  ae51.edge4.stockholm2.level3.net
> [213.249.107.93]
>   8    26 ms    26 ms    26 ms  ae-1-3107.edge6.dusseldorf1.level3.net
> [4.69.161.194]
>   9     *       27 ms    27 ms  dtag-level3-dusseldorf1.level3.net [4.68.71.114]
>  10    31 ms    31 ms    32 ms  p5b17c5e1.dip0.t-ipconnect.de [91.23.197.225]
>  11    35 ms    35 ms    35 ms  p4fd21c51.dip0.t-ipconnect.de [79.210.28.81]
> 
> Trace complete.
> 
> Does your ddns service update the DNS servers around the world?

I don't know. I've used it for almost a year with no problems. (But there
were problems before.) 

> If not then the ddns is pointless.
> If it does but provides sketchy service you should change ddns provider.

I've already found me a new (non-commercial) one. But the automatic updates
(as to be done by ddclient) don't work yet.

Goodbye,
Volker
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