Good day, I recently encountered a strange error regarding samba shares. I set up the shared directories on multiple computers on my home network. I enabled ufw and added samba rule with 'ufw allow samba'. Since I have kaby lake processor in my laptop I updated to the 4.8 kernel series with 'sudo apt install linux-generic-hwe-16.04-edge'. If I load the 4.8 kernel the ufw firewall blocks my connections to other samba shares on the network. If I disable the firewall I can connect to the other shares. Incoming connections are not blocked to this computer even with firewall on. Strangely everything works as it should if I boot with 4.4 kernel but it again broken when I try the newer kernel. There seems to be other people experiencing this strange behavior as well over the Lnux Mint community as well: https://forums.linuxmint.com/viewtopic.php?t=235049

I just wanted to point this issue out in case the ubuntu developers are not aware of it and ask any advice how to fix this. The solution over the Mint forums are a bit to technical for me I'm afraid.