I use afwall to prevent most things from having internet.

I had a lot of trouble getting wifi to work with afwall enabled in android 11.

I’m running a samsung A52 5G chinese version with android 11.

The issue is that the captive portal detection decides that there isn’t internet, and that I should get fucked.

There is a lot of stuff saying that the way to disable captive portal detection is

settings put global captive_portal_detection_enabled 0

Those are all for older android, so I checked the relevant part of the android 11 source.

That says captive_portal_detection_enabled is deprecated, use captive_portal_mode_ignore instead.

I tried each one individually, and both together

$ settings list global | grep captive

after a reboot, it still says no internet and adb logcat | grep connectivity shows

12-02 14:25:14.146  2558 14335 D NetworkMonitor/602: PROBE_DNS connectivitycheck.gstatic.com 18ms OK
12-02 14:25:24.165  2558 14335 D NetworkMonitor/602: PROBE_HTTP http://connectivitycheck.gstatic.com/generate_204 Probe failed with exception java.net.SocketTimeoutException: failed to connect to connectivitycheck.gstatic.com/ (port 80) from / (port 38978) after 100

App 2559 is “Setup Wizard” in afwall for me, and allowing that wifi means the captive portal at least can figure out there is internet.

I really don’t like that I can’t disable the connectivity check because I would like my phone to allow me access to a network I told it to connect to regardless of what it thinks about google being accessable.

But whatever, at least it gives me internet now.

UPDATE 2021-12-08: it didn’t quite work all the time. It’s now working and this is now the list of things I think are relevant:

  • 1000 Filter Provider, bunch of other stuff
  • 10177 CaptivePortalLogin
  • 5023 NetworkDiagnostic
  • 10255 Setup Wizard (shows up in a search for 2559, but displays as 10255 now?)