Simplest way to deny access to a class C

Gary Gatten Ggatten at
Fri Mar 4 00:02:43 UTC 2011

Be careful of automated responses.  What if someone spoofs IP's of legit users / customers / whatever and your automated response blocks them?  Not good.

I thought about blocking....well, never mind - might pi$$ someone off and attract unwanted attention...

-----Original Message-----
From: owner-freebsd-questions at [mailto:owner-freebsd-questions at] On Behalf Of Patrick Gibson
Sent: Thursday, March 03, 2011 5:58 PM
To: Jorge Biquez
Cc: freebsd-questions at
Subject: Re: Simplest way to deny access to a class C

You might consider mod_security (/usr/ports/www/mod_security) which
can be set up to ban hosts based on behaviour or characteristics.

Or fail2ban (/usr/ports/security/py-fail2ban) is really great, too, in
that it scans whatever logs you want, and can trigger a block in your
firewall if enough violating log entries are found within a particular
period of time. Everything is totally configurable, and there are
plenty of examples that come with it.


On Thu, Mar 3, 2011 at 8:59 AM, Jorge Biquez <jbiquez at> wrote:
> Hello all.
> I am sorry in advance if this question sounds too stupid.
> I have a small server for personal use of webpages running:
> it is working fine , no problem very stable.
> I just need to block some IP class C address that are always trying to
> "discover" directories or applications under the web server. They do not do
> and can not do anything since this server has nothing installed but i am
> tired of seeing in the logs all the intents they do every 2-3 seconds.
> I have not installed any kind of firewall yet.
> What do you think is the best way to accomplish this task? If possible the
> easiest one. I do not want to do anything else but just bloc IP's, at this
> moment at least.
> Thanks in advance.
> Jorge Biquez
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