NethServer Version: 7.5
my server encounters of course some hacker attackes. Most attacks are based on recidive or postfix-ddos. Fail2ban blocks attacks as expected. 2-3 attackes per day - some more during weekends - a spare time hacker - are located in same IP Range / Provider (Litausia 185.36.81.x) or similar. I guess this is a VPN provider.
I do not expect any “regular server activities” from that area / provider. Can I block IPs using Fail2Ban? Can I tell Fail2Ban not only to block the specific IP but the complete range?