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A script to automatically blacklist illegal ssh attempts
Authored by: kevinv on Sep 15, '04 07:39:39PM
in the \etc\ssh\sshd_config file change the option (or add it if missing) PasswordAuthentication to no. Set the option PubkeyAuthentication to yes. If you have to use SSH protocol version 1 then set RSAAuthentication to yes.

Oh and set PermitRootLogin to no while you're there.

sshd_config man page

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