I hope I have resolved last cases of calling Onyx. There were 2 problems.
Captive portal login detection uses en-rom.boox.com as a test site. I have disabled this functionality with following settings:
Code:
adb shell settings put global captive_portal_mode=0
adb shell settings put global captive_portal_mode_ignore=1
adb shell settings put global network_avoid_bad_wifi=0
NTP uses as default some address at Onyx (don't remember link), which result in synchronizing time with China. I have changed it with settings:
Code:
adb shell settings put global ntp_server=pl.pool.ntp.org
adb shell settings put global ntp_server_2=pool.ntp.org
In firewall I have disabled all system programs (including network manager) except NTP. Not sure if this is the final configuration, I will test it.