Interesting, I have never heard of sshblack but was wondering how is this different than Fail2ban?
Also it doesn't seem to be updated since 2007 so personally I would advice against using it.
SSHBlack & Fail2ban are similar applications. SSHBlack is simple and straight forward. It does only one job - protects your server from SSH attacks, & it does it well.
Regarding Updates - Its just a PERL script, which parses logs for a REGEX.
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