Glo Wifi connection without internet access

Hallo everyone,

I want to use my Kobo Glo inside my home network but without it having internet access.
When I block the Glo's internet access (either via DNS or via my router directly) and connect to the Wifi it seems to try to contact/open kobo.com which it can not and then terminates the wifi connection (and probably some additional connectivity checks?).

I found some old posts regarding this "issue":
https://www.mobileread.com/forums/sh....php?p=3262734
https://www.mobileread.com/forums/sh...d.php?t=271049

Those seem kinda old and the kobo patch syntax seems to have changed as well. I took a quick look into the recent libnickel.so but the functions look quite different now and I'm not versatile enough in assembler to adapt it to the new wifi logic.

Is there any known way how to disable the connectivity check for the wifi so that I can just use the Kobo inside my local home network for kobo sync and calibre-web?

Thanks for any help :)