On Tue, May 23, 2006 at 03:59:28AM +0200, Morten Nilsen wrote:
> This new package adds a new service, sshdfilter.
> 
> To use it, issue these commands:
>    chkconfig sshd off
>    service sshd stop
>    chkconfig sshdfilter on
>    service sshdfilter start
> 
> now, for what it does:
> 
> As many of you probably have noticed, there has lately been an influx of 
> brute force attacks on ssh daemons.
> 
> this new ssh service will dynamically drop such attempts by watching the 
> sshd log in real time.
> 
> for more specific details, see the home page at 
> http://www.csc.liv.ac.uk/~greg/sshdfilter/
(...)

Great stuff. Just want to point out that a similar result can also be
achieved using the 'recent' module of iptables, maybe in a more
elegant way (no need to parse logs).
See e.g.:

http://www.e18.physik.tu-muenchen.de/~tnagel/ipt_recent/
http://www.debian-administration.org/articles/187

Unfortunately the corresponding kernel module in TSL 2.2 has a bug
causing kernel oops :-(. It's OK in 3.0 I think.

Greets,
_Alain_
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