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Date:      Fri, 04 Mar 2011 16:27:09 -0800
From:      "Robison, Dave" <>
Subject:   Re: Simplest way to deny access to a class C
Message-ID:  <>
In-Reply-To: <>
References:  <>	<>	<> <>

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Check out portsentry perhaps?

I used to use it quite a bit. Whenever someone would hit one of a number 
of defined ports, I'd automatically add a rule denying them in IPFW and 
also drop their route to a non-existent IP on my class C.

On 03/04/11 16:14, Patrick Gibson wrote:
> fail2ban by default only bans an IP for 10 minutes, and that's
> configurable. It can also email you anytime it imposes a ban, so one
> can keep an eye on things at least in the beginning to see if it's
> causing a problem for legitimate users.
> On Thu, Mar 3, 2011 at 4:02 PM, Gary Gatten<>  wrote:
>> 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: [] On Behalf Of Patrick Gibson
>> Sent: Thursday, March 03, 2011 5:58 PM
>> To: Jorge Biquez
>> Cc:
>> 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.
>> Patrick
>> On Thu, Mar 3, 2011 at 8:59 AM, Jorge Biquez<>  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
>>> _______________________________________________
>>> mailing list
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Dave Robison
Sales Solution Architect II
FIS Banking Solutions
510/621-2089 (w)
530/518-5194 (c)
510/621-2020 (f)


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