From: Robert Nichols <rnicholsNOSPAM@comcast.net>
To: netfilter@lists.netfilter.org
Subject: Re: syn DDoS attack solution
Date: Tue, 19 Jun 2007 17:19:26 -0500 [thread overview]
Message-ID: <f59kpi$1vs$1@sea.gmane.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0706191422070.29334@darkstar.sysinfo.com>
R. DuFresne wrote:
>
> On Fri, 1 Jun 2007, Martijn Lievaart wrote:
>>
>> An connection is in the ESTABLISHED state once a packet has been seen.
>> So once the SYN is seen, the state is ESTABLISHED.
>>
>
>
> No, it is in state "new" with a mere syn sent.
You have to specify whether you are talking about the TCP connection
status or the conntrack status. A mere SYN is sufficient to make an
ESTABLISHED status in conntrack. If that were not true, then when
I send a TCP SYN packet the SYN/ACK would never make it back through
my firewall.
--
Bob Nichols "NOSPAM" is really part of my email address.
Do NOT delete it.
next prev parent reply other threads:[~2007-06-19 22:19 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-31 16:19 syn DDoS attack solution Bgs
2007-05-31 19:57 ` R. DuFresne
2007-06-01 9:45 ` Bgs
2007-05-31 20:08 ` Ric Messier
2007-06-01 1:20 ` Tony.Ho
2007-06-01 9:44 ` Bgs
2007-06-01 15:01 ` Ric Messier
2007-06-01 15:37 ` Bgs
2007-06-02 19:07 ` R. DuFresne
2007-06-04 14:22 ` Ric Messier
2007-06-04 17:24 ` Martin McKeay
2007-06-04 23:16 ` R. DuFresne
2007-06-05 8:29 ` Bgs
2007-06-05 14:16 ` Steven M Campbell
2007-06-05 15:22 ` ..prevention, was: " Arnt Karlsen
[not found] ` <466583F4.8080107@SCampbell.net>
2007-06-05 15:40 ` Steven M Campbell
2007-06-05 18:34 ` Arnt Karlsen
2007-06-07 18:41 ` Martin McKeay
2007-06-08 1:40 ` Arnt Karlsen
2007-06-12 18:10 ` Martin McKeay
2007-06-12 22:44 ` R. DuFresne
2007-06-13 14:24 ` Martin McKeay
2007-06-13 17:26 ` Arnt Karlsen
2007-06-13 17:44 ` Martin McKeay
2007-06-14 19:43 ` R. DuFresne
2007-06-14 20:13 ` supportnew
2007-06-01 21:34 ` Martijn Lievaart
2007-06-01 21:37 ` Martijn Lievaart
2007-06-01 21:38 ` Ric Messier
2007-06-01 23:09 ` Ethy H. Brito
2007-06-19 18:22 ` R. DuFresne
2007-06-19 22:19 ` Robert Nichols [this message]
2007-06-19 23:02 ` Pascal Hambourg
2007-06-21 18:26 ` R. DuFresne
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