crazy hackers and logwatch
Florin Andrei
florin at andrei.myip.org
Tue Sep 6 18:36:46 UTC 2005
On Tue, 2005-08-09 at 09:00 -0700, Brian Gaynor wrote:
> On Tue, 2005-08-09 at 09:39 -0600, Kevin Fenzi wrote:
> >
> > $IPTABLES -A INPUT -m hashlimit -m tcp -p tcp --dport 22 --hashlimit 1/min --hashlimit-mode srcip --hashlimit-name ssh -m state --state NEW -j ACCEPT
>
> I've used similar rules for some time now and they've proven very
> effective. The only problem I've run into is with subversion over SSH,
> it generates a lot of short connections sometimes (for example when
> browsing a repository) and can look like an attack to this kind of
> block.
That issue has been addressed by the newly released openssh-4.2
http://www.mindrot.org/pipermail/openssh-unix-announce/2005-September/000083.html
Quote:
- Many bugfixes and improvements to connection multiplexing,
including:
- Added ControlMaster=auto/autoask options to support opportunistic
multiplexing (see the ssh_config(5) manpage for details).
--
Florin Andrei
http://florin.myip.org/
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