From: Slava Dubrovskiy <slava@tangramltd.com>
To: ALT Linux sysadmin discuss <sysadmins@lists.altlinux.org>
Subject: Re: [Sysadmins] Защита от DDOS
Date: Tue, 10 Apr 2007 09:57:47 +0300
Message-ID: <461B356B.5010901@tangramltd.com> (raw)
In-Reply-To: <200704101149.54117.a_s_y@sama.ru>
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Sergey пишет:
> On Tuesday 10 April 2007, Slava Dubrovskiy wrote:
>
>
>> Вот и нас накрыло :-) .
>> В связи с этим задумались про защиту. Расскажите, кто как защищается?
>> Вот пока выбираю между:
>> 1. mod_evasive
>> 2. mod_security
>> 3. snort
>>
>
> Я, в похожей ситуации, поступил просто:
>
> for RULE in `netstat -an|grep -v unix| \
> sed -e "s/^.*:80 *\(.*\):\(.*\)/-A INPUT -s \1 -j DROP/"| \
> sort|uniq -c|sort -n|egrep "[0-9]{3,7} -A"|sed -e "s/ /_/g"`; do
>
> echo $RULE
>
> RULE_R=`echo $RULE|sed -e "s/_/ /g"|sed -e "s/^.*\(-A .*\)/iptables \1/"`
>
> echo $RULE_R
>
> `$RULE_R`
> done
>
> То есть, если число коннектов трёхзначное, IP в drop. И в крон.
>
А если по одному конекту с 10000 не существующих IP?
--
WBR,
Dubrovskiy Vyacheslav
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next prev parent reply other threads:[~2007-04-10 6:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 6:34 Slava Dubrovskiy
2007-04-10 6:49 ` Sergey
2007-04-10 6:57 ` Slava Dubrovskiy [this message]
2007-04-10 7:01 ` Avramenko Andrew
2007-04-10 9:59 ` Sergey
2007-04-10 6:56 ` Avramenko Andrew
2007-04-10 8:31 ` Michael Shigorin
2007-04-11 14:47 ` Nick Gavrikov
2007-04-12 9:21 ` Денис Смирнов
2007-04-12 11:42 ` Slava Dubrovskiy
2007-04-12 12:03 ` Денис Смирнов
2007-04-12 12:14 ` Dmitry V. Levin
2007-04-12 13:22 ` Денис Смирнов
2007-04-12 15:28 ` Nick Gavrikov
2007-04-12 15:54 ` Денис Смирнов
2007-04-12 18:40 ` Konstantin A. Lepikhov
2007-04-12 18:48 ` Nick Gavrikov
2007-04-12 19:57 ` Денис Смирнов
2007-04-13 12:12 ` Sergey
2007-04-13 15:41 ` Денис Смирнов
2007-04-13 16:16 ` Peter Evdokimov
2007-04-13 16:28 ` Денис Смирнов
2007-04-16 4:50 ` Sergey
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