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Helsinki metro: Android reports no connectivity in WLAN and asks if I want to keep using it unless I disable secure DNS and toggle WLAN off and on. Mobile data was disabled.
Captive portal: I need to test it somewhere, Espresso House or Hesburger?
This question just happens to be something I have wondered since I heard of the feature and now that I got Android 9.
Forgotten test: what happens if I enable Intra (DoH) while Android claims not having connectivity. Maybe it will fail as it cannot resolve dns.quad9.net? What if I point it to 188.8.131.52? Is the certificate valid for that?
Sent from my Nokia 1 using FastHub-Libre
Note: at PPFI HQ secure DNS was reporting not connected in settings while WLAN was connected and usiing possibly
Quad9 DNS is valid for at least the IPv4 addresses https://184.108.40.206/dns-query
Test: tell PPFI HQ router to use Quad9 DNS for IPv4 and Android to use secure DNS in automatic mode.
Result: Android reports that secure DNS is in use.
Todo: try it at home where ISP doesn't support secure DNS and MiFi doesn't have option to change what DHCP gives.
Test problem: for some reason the router doesn't allow me to configure the IPv6 DNS servers I want to use and thus the ISP ones always get used.
Helsinki metro without mobile data: WLAN has no internet connectivity
Add Intra: there is still the WLAN symbol with an x to tell me the same error, but the connection works regardless.
Captive portal: R Kiosk at Sörnäinen metro station didn't like my phone and I cannot comment without further testing.
DoT Automatic without DHCP providing DoT capable server: test pending…
Disabling Intra in metro: it warns about DNS being insecure likely, because it cannot detect connection to DoT?
Captive portal: getting from metro to Espresso House WLAN I am greeted by a captive portal, so I guess the captive portal detection works without DoT and I am happy about that.'
In the blog I will need to note this condition in case it's caused by the move without DoT getting established in the middle.
Oh and Intra was using the IP address above and I am not curious enough to see if my hypothesis on it failing to find dns.quad9.net was correct.