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DenyHosts is a script intended to be run by Linux system administrators to help thwart SSH server attacks (also known as dictionary based attacks and brute force attacks).

This packaged was developed by the University of Michigan College of LSA IT department.


Mac OS X 10.4 or later, Python.

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Likos Member IconComment+26

Has anyone gotten this to work in 10.6?

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Version 2.6
Pedro-Fardilha Member IconComment+222

Hi all.
The download link no longer works.
Does anyone know of another place where we can obtain this?

Thank you

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Version 2.6
Borlox Member IconReview+222

Excellent stuff. I've been using it for years. If you're running a public SSH server, you MUST install this. It's for advanced users -- a Python script, not a GUI application -- but it well repays the effort to learn how to set it up.

What it does is to watch a log file for unsuccessful attempts to connect to your SSH server. If there are too many attempts from a particular IP address, DenyHosts blocks all further SSH connections from that address. Optionally, it also connects to a central server and downloads the IP addresses of hosts that have attacked other users. Those hosts are then blocked too, usually before they ever attack you. Your attackers' addresses are also uploaded to the server. This creates a group-immunity effect.

It can also notify you by email when a host is blocked.

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Version 2.6
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> 5 1


Current Version (2.x)


Downloads 2,625
Version Downloads 2,623
License Free
Date 10 Jul 2008
Platform OS X / PPC 32 / Intel 32
Price Free
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