Dear systemd folks,
Since over half a year, I am having problems with the German Rail WIFI
(Deutsche Bahn, WIFIonICE) [1]. I am only having problems with the WIFI
in the train. The WIFI on the train stations (operated by Deutsche
Telekom(?)) works fine.
I am able to connect to the WIFI network, but accessing the capture page
to log in, and after logging in, I am having serious DNS problems in the
browsers (Mozilla Firefox 70.0 and Google Chromium). I am using Debian
Sid/unstable.
It looks like that, DNS requests are not answered in time (also
confirmed by the developer tools in the browser). SSH (and even Mozilla
Thunderbird) seems to work better. The fellow train travelers do not
seem to have any problems.
Testing on the console shows:
```
$ time host bahn.de
bahn.de has address 18.185.205.203
bahn.de has address 35.157.56.133
bahn.de has address 35.158.56.207
bahn.de mail is handled by 10 mailgate2.deutschebahn.com.
bahn.de mail is handled by 10 mailgate1.deutschebahn.com.
real 0m0,243s
user 0m0,021s
sys 0m0,000s
$ systemd-resolve bahn.de
bahn.de: resolve call failed: Die Wartezeit für die Verbindung ist
abgelaufen
$ time systemd-resolve bahn.de
bahn.de: resolve call failed: DNSSEC validation failed: failed-auxiliary
real 0m55,967s
user 0m0,006s
sys 0m0,006s
$ time systemd-resolve bahn.de
bahn.de: resolve call failed: Die Wartezeit für die Verbindung ist
abgelaufen
real 2m0,094s
user 0m0,005s
sys 0m0,007s
$ time systemd-resolve bahn.de
bahn.de: resolve call failed: Die Wartezeit für die Verbindung ist
abgelaufen
real 2m0,113s
user 0m0,014s
sys 0m0,000s
```
How can this be debugged (next time I am using the ICE)? Is this
systemd-resolved related? If not, who should I bug about it?
Kind regards,
Paul
[1]: https://www.bahn.de/p/view/service/zug/railnet_ice_bahnhof.shtml
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