Fail2ban is one way to protect your site(s) would be to use with the annoying brute force hack going round As with all fail2ban rules, it’s not going to work if the attacker changes IP often (but from scanning the logs so far, it doesn’t seem to be the case that …
Iptables setting Firewall Debian Linux
Iptables provides packet filtering, network address translation (NAT) and other packet mangling. Two of the most common uses of iptables is to provide firewall support and NAT. Configuring iptables manually is challenging for the uninitiated. Fortunately, there are many configuration tools (wizards) available to assist: e.g., fwbuilder, bastille, ferm (wiki …