netdev - Re: [PATCH net-next] tcp: be more strict before accepting ECN negociation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20120504.120650.1991523144126931829.davem@davemloft.net>
Date:	Fri, 04 May 2012 12:06:50 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, perryl@...gle.com, mattmathis@...gle.com,
	ycheng@...gle.com, ncardwell@...gle.com, therbert@...gle.com,
	wilmer@...gle.com, dave.taht@...ferbloat.net, jankur@...gle.com
Subject: Re: [PATCH net-next] tcp: be more strict before accepting ECN
 negociation

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Fri, 04 May 2012 17:14:02 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> It appears some networks play bad games with the two bits reserved for
> ECN. This can trigger false congestion notifications and very slow
> transferts.
> 
> Since RFC 3168 (6.1.1) forbids SYN packets to carry CT bits, we can
> disable TCP ECN negociation if it happens we receive mangled CT bits in
> the SYN packet.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html