denyhosts/pfctl to block repeated logins?

andrew clarke mail at
Sat Jun 20 11:55:54 UTC 2015

On Sat 2015-06-20 07:34:50 UTC-0400, John Holland (jholland at wrote:

> What is the best tool to use to block repeated login attempts from
> unauthorized hosts?  And for deny hosts, how you unblock someone who
> is legitimate?

"Best tool" is difficult to answer since it depends on your exact

Also once an admin finds an IP blocker that works for them, they may
tend to stick with it rather than try all the alternatives.

For blocking unsuccessful ssh logins, sshguard-ipfw works for me.

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