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Date:      Fri, 04 Mar 2011 16:27:09 -0800
From:      "Robison, Dave" <david.robison@fisglobal.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: Simplest way to deny access to a class C
Message-ID:  <4D71835D.3020007@fisglobal.com>
In-Reply-To: <AANLkTi=619ih7aP8ic_rTqFWVmk_P2Zrob=XJUsvLfHL@mail.gmail.com>
References:  <3382016411-764985335@intranet.com.mx>	<AANLkTi=Fb_CiA76g79ZkP8o_yWsQcN6iuPD7w=dBxztQ@mail.gmail.com>	<11805_1299196962_4D702C22_11805_70_1_D9B37353831173459FDAA836D3B43499BD354A48@WADPMBXV0.waddell.com> <AANLkTi=619ih7aP8ic_rTqFWVmk_P2Zrob=XJUsvLfHL@mail.gmail.com>

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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<Ggatten@waddell.com>  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: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Patrick Gibson
>> Sent: Thursday, March 03, 2011 5:58 PM
>> To: Jorge Biquez
>> Cc: freebsd-questions@freebsd.org
>> 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<jbiquez@intranet.com.mx>  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:
>>>
>>> 7.3-PRERELEASE FreeBSD 7.3-PRERELEASE #0
>>>
>>> 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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>>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
>>> To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
>>>
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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)
daver@vicor.com
david.robison@fisglobal.com

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