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ssh brute force attacks

Debian Linux Stop SSH User Hacking / Cracking Attacks with DenyHosts Software

I've noticed lots of failed login attempt for my Debian Linux VPS root server account. How do I stop automated bot based SSH attacks on my server?
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Red Hat / Centos Install Denyhosts To Block SSH Attacks / Hacking

How do I block and stop attacks on ssh server under CentOS Linux or Red Hat Enterprise Linux server 5.x?
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