1800 running R81.10.05.
Remote Access blade is enabled as well as S2S VPN and there are some incoming NAT pointing to DMZ services.
Since a few days, the firewall decided that all incoming traffic should be blocked on implied rule 0 except for the S2S VPN.
The firewall itself has been running OK since a year.
All DMZ traffic stopped, Remote Access isn't possible anymore and we see in the logs that this traffic is dropped on Implied rule 0.
Disabling and enabling the RA blade doesn't help, rebooting the firewall neither as well as changing policy mode, disabling IPS and whatnot.
Also tried to add a permissive rule for incoming traffic but same thing about the implied rule.
This is likely not a network issue. All outbound traffic is working perfectly and NATted behind the same general public IP of the firewall. S2S VPN works anyway.
Checked advanced options and everything around, no dice. CLI debug also show drop from implied rule 0 for any incoming traffic that should be allowed (DMZ, Remote Access).
Any advice is appreciated. I can't make a TAC case for now as the customer is going through renewal but the blades themselves are covered until 2025.