I posted some findings at After recent update, Windows HVM can no longer network through Whonix gateway · Issue #9990 · QubesOS/qubes-issues · GitHub
Workaround in sys-whonix:
echo 1 | sudo tee $(find /proc/sys/net/ipv4 -name arp_ignore)
(this won’t persist restart, needs to be repeated after each sys-whonix start)
Can you find approximately which update broke it? Especially what was the working version of the security-misc package
The update breaking networking is the most recent one. I don’t know if it’s Qubes or Whonix related, since both updated the Whonix Gateway template at the same time. Since then, no other update has been released.
For some reason, I haven’t received a notification for a long time that there are updates for the gateway and workstation templates. There were no updates for about 2 months, possibly more (from 2 to 4 months). I updated manually in the terminal and after that I stopped connecting to Windows HVM. Note: when I updated through the terminal, there was some kind of inscription that had never been there before when updating, in it I had to confirm or deny or write something (I don’t remember what was there) I mean, maybe the problem is not related to the new update, but to the previous one? or before the previous one
I update Qubes daily and the update breaking networking is the one released 20 days ago. All other previous updates worked fine.