How to ban failed SSH, FTP, POP3 and SMTP logins?
So, as title says I am interested in findig the best possible way to ban all of IP's from where failed logins originate for ssh, ftp, pop3 and smtp services.
I past few days few hackers from China are permanently trying to login in any/all of those services. My complaints to their network's hostmasteers were hopeless.
As I am still under attack 24h daily, I am open to all sugestions.
P.S. DenyHosts installed for SSH. Logcheck too.
Debian Lenny & ISPConfig 3