auth.log & intruder prevention

Daniel Gerzo danger at
Tue Jan 24 15:57:55 PST 2006

On Tue, Jan 24, 2006 at 10:02:26PM +0100, Ilias Sachpazidis wrote:
> Hi Everyone,

> In auth.log of my FreeBSD boxes I got many requests to port 22, as you can
> see below.
> ----begin of snippet
> Jan 22 11:21:50 zeus sshd[92900]: Failed password for illegal user cracking
> from port 58344 ssh2
> Jan 22 11:21:53 zeus sshd[92902]: Failed password for illegal user hacking
> from port 58443 ssh2
> ----end of snippet
> I am wondering if any script is available to prevent hundreds of attempts on
> port 22 from external IPs that constantly checking user & passwords on my
> FreeBSD PCs.
> What I am looking for is a deamon application/script that receives the
> recorded data from auth.log and detects if any remote client (IP address) is
> checking user and passwords (Detection pattern: 5 missing attempts in 1
> min). On a successful detection, the script should add an ipfw rule
> rejecting further IP packets from the specific remote address.
> Is any script or something similar available so far? 

I've written a BruteForceBlocer, you can install it from ports as well,
check security/bruteforceblocker.

Hope you will like it.

   Daniel Gerzo

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