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SSH Hardening

Tip 1:Generating Key


Tip 2:Telling SSH server To accept Your Key 


Tip 3:Disable Root Logins


Tip 04:Disable ssh Password Logins


Tip 5:Run SSh on Non-default port


 Tip 6:Use Fail2ban
Fail2ban scans log files (e.g. /var/log/apache/error_log) and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. Generally Fail2Ban then used to update firewall rules to reject the IP addresses for a specified amount of time, although any arbitrary other action (e.g. sending an email, or ejecting CD-ROM tray) could also be configured. Out of the box Fail2Ban comes with filters for various services (apache, curier, ssh, etc)

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