From: Grant Taylor <gtaylor@riverviewtech.net>
To: Mail List - Netfilter <netfilter@vger.kernel.org>
Subject: Re: Preventing simple DoS attacks with ipt_recent on Kernel 2.6.9-42.ELsmp
Date: Wed, 28 Nov 2007 10:33:07 -0600 [thread overview]
Message-ID: <474D9843.9040605@riverviewtech.net> (raw)
In-Reply-To: <CC12CD48AEDA1E4B8A3F626DA84E927209CD45BA@ka-cap-sr-3601.xb.local>
On 11/28/07 10:14, Shaun Mccullagh wrote:
> iptables -A FORWARD -p tcp --dport 80 -i eth0 -m state --state NEW -m
> recent --set --name browserconn -j ACCEPT
>
> iptables -A FORWARD -p tcp --dport 80 -i eth0 -m state --state NEW -m
> recent --rttl --update --seconds 60 --hitcount 100 --name blocked -j
> DROP
...
> Nothing appears in /proc/net/ipt_recent/blocked
...
> What am I doing wrong?
I think the problem you are seeing has to do with the difference of
"--set" verses "--update" in the recent match. Namely I'm not sure that
"--update" or "--rcheck" will actually add address to a recent list if
they are not already in there.
> Is the nc test valid?
I'm guessing so seeing as how you are seeing packets added to the
browserconn recent list.
Grant. . . .
next prev parent reply other threads:[~2007-11-28 16:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-28 15:49 Reg Stateful firewall Shyam Prasad
2007-11-28 16:14 ` Preventing simple DoS attacks with ipt_recent on Kernel 2.6.9-42.ELsmp Shaun Mccullagh
2007-11-28 16:33 ` Grant Taylor [this message]
2007-11-28 16:21 ` Reg Stateful firewall Grant Taylor
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