DenyHosts - protect ssh from hackers
What is DenyHosts?
DenyHosts is a script intended to be run by Linux system administrators to help thwart SSH server attacks (also known as dictionary based attacks and brute force attacks).
emerge denyhosts #
link :
http://gentoo-wiki.com/HOWTO_Protect_SSHD_with_DenyHosts
http://denyhosts.sourceforge.net