I have a USB wwan modem that I used frequently. I pass the modem to sys-net via sys-usb.
Now when I connect, no vm besides sys-net recieves packets. I can ping ip and fqdn from sys-net terminal, and browse the web via firefox in sys-net and everything seems to work.
But sys-firewall and anything connected to sys-firewall does not seem to get packets passed to them from sys-net.
Iptables -L -v -n shows packets being sent out from sys-firewall, and sys-net shows that it recieves them in the chain and forward tables, and seems to show sys-net sending the packets out to ‘the internet’.
But when viewing iptables in sys-firewall or any other vm no packets seem to be returning from sys-net. Only the outbound counters increase. Sys-firewall still seems to be forwarding packets from other vms connected to it.
This does not happen when using the wifi connection.
I tried attaching the usb pci device to sys-net directly to remove sys-usb from the picture and it changed nothing.
Changing kernels from 120(current for me) to 110(the oldest I have and one that worked) changed nothing.
This happens using both Fedora and Debian.
I did post about something similar a few days ago, the problems are related and growing. But I cant seem to delete topics in dicourse(sorry).