Multiple old SG firewalls - Too many failed logins from same IP

Hi there, How many chances to see all my customers SG firewwall with "Too many failed logins from" same IP ? I have only 4 customers left on SG models and all of them have the same problem, starting...
Enhancing OT Network Security with a 2.5 DMZ

In our OT network, we're considering adding a Level 2.5 DMZ to bolster security. This would serve as an additional layer of protection between the control systems (Level 2) and the enterprise network ...
install fail2ban on utm9

i saw a thread thats 8 years old, so someone did it, but i guess till now, thats kinda outdated. anyone here who installed it in that "last year" ? thanks