From: Hans Schillstrom <hans.schillstrom@ericsson.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Rick Jones <rick.jones2@hp.com>, Andi Kleen <andi@firstfloor.org>,
Jesper Dangaard Brouer <jbrouer@redhat.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Christoph Paasch <christoph.paasch@uclouvain.be>,
"David S. Miller" <davem@davemloft.net>,
Martin Topholm <mph@hoth.dk>, Florian Westphal <fw@strlen.de>,
Tom Herbert <therbert@google.com>
Subject: Re: [RFC PATCH 2/2] tcp: Early SYN limit and SYN cookie handling to mitigate SYN floods
Date: Thu, 31 May 2012 17:31:55 +0200 [thread overview]
Message-ID: <201205311731.57159.hans.schillstrom@ericsson.com> (raw)
In-Reply-To: <1338473361.2760.1361.camel@edumazet-glaptop>
On Thursday 31 May 2012 16:09:21 Eric Dumazet wrote:
> On Thu, 2012-05-31 at 10:45 +0200, Hans Schillstrom wrote:
>
> > I can see plenty "IPv4: dst cache overflow"
> >
>
> This is probably the most problematic problem in DDOS attacks.
>
> I have a patch for this problem.
>
> Idea is to not cache dst entries for following cases :
>
> 1) Input dst, if listener queue is full (syncookies possibly engaged)
>
> 2) Output dst of SYNACK messages.
>
Sound like a good idea,
if you need some testing just the patches
--
Regards
Hans Schillstrom <hans.schillstrom@ericsson.com>
next prev parent reply other threads:[~2012-05-31 15:32 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-28 11:52 [RFC PATCH 0/2] Faster/parallel SYN handling to mitigate SYN floods Jesper Dangaard Brouer
2012-05-28 11:52 ` [RFC PATCH 1/2] tcp: extract syncookie part of tcp_v4_conn_request() Jesper Dangaard Brouer
2012-05-28 11:52 ` [RFC PATCH 2/2] tcp: Early SYN limit and SYN cookie handling to mitigate SYN floods Jesper Dangaard Brouer
2012-05-29 19:37 ` Andi Kleen
2012-05-29 20:18 ` David Miller
2012-05-30 6:41 ` Eric Dumazet
2012-05-30 7:45 ` Jesper Dangaard Brouer
2012-05-30 8:15 ` Eric Dumazet
2012-05-30 9:24 ` Jesper Dangaard Brouer
2012-05-30 9:46 ` Eric Dumazet
2012-05-30 8:03 ` Hans Schillstrom
2012-05-30 8:24 ` Eric Dumazet
2012-05-30 11:14 ` Hans Schillstrom
2012-05-30 21:20 ` Rick Jones
2012-05-31 8:28 ` Eric Dumazet
2012-05-31 8:45 ` Hans Schillstrom
2012-05-31 14:09 ` Eric Dumazet
2012-05-31 15:31 ` Hans Schillstrom [this message]
2012-05-31 17:16 ` Eric Dumazet
2012-05-28 16:14 ` [RFC PATCH 0/2] Faster/parallel SYN " Christoph Paasch
2012-05-29 20:17 ` Jesper Dangaard Brouer
2012-05-29 20:36 ` Christoph Paasch
2012-05-30 8:44 ` Jesper Dangaard Brouer
2012-05-30 8:50 ` Eric Dumazet
2012-05-30 8:53 ` Christoph Paasch
2012-05-30 22:40 ` Jesper Dangaard Brouer
2012-05-31 12:51 ` Jesper Dangaard Brouer
2012-05-31 12:58 ` Eric Dumazet
2012-05-31 13:04 ` Jesper Dangaard Brouer
2012-05-31 13:10 ` Eric Dumazet
2012-05-31 13:24 ` Jesper Dangaard Brouer
2012-05-30 4:45 ` Eric Dumazet
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