From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261664AbVFPMpm (ORCPT ); Thu, 16 Jun 2005 08:45:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261672AbVFPMpm (ORCPT ); Thu, 16 Jun 2005 08:45:42 -0400 Received: from nproxy.gmail.com ([64.233.182.203]:61022 "EHLO nproxy.gmail.com") by vger.kernel.org with ESMTP id S261664AbVFPMpc convert rfc822-to-8bit (ORCPT ); Thu, 16 Jun 2005 08:45:32 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=ue6OhMp+oDAefgv7Ny1cs9NC3j83kY4kBQcO5l94fANgK0YfVSioaA+3TSFbWJ6XvQlEoQfr5+S97lu7lGilk/Kk0/khDKkef9jJIYhQmFhm1Hpl51U0tsdlC0XiU1hisruXMduw87YLBqhZRfwGKT0Iqi0HKA4L9fgr9wIA3+0= Message-ID: <4ad99e0505061605452e663a1e@mail.gmail.com> Date: Thu, 16 Jun 2005 14:45:30 +0200 From: Lars Roland Reply-To: Lars Roland To: Linux-Kernel Subject: tg3 in 2.6.12-rc6 and Cisco PIX SMTP fixup Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi I am testing kernel 2.6.12-rc6 on a 6 IBM 335 servers. The NICs are gigabit broadcom. If I use the tg3 driver then each of the servers are unable to communicate with a Cisco PIX using SMTP fixup, the connection simply get cut: ------------- telnet xx.x.xx.xx 25 Trying xx.x.xxx.xx... Connected to xx.x.xxx.xx. Escape character is '^]'. mail to: Connection closed by foreign host. ------------- Using tcpdump does not give me any clue as to what goes wrong, the connection is simply lost so I am suspecting some kind of TX/RX mess up. If I instead use the tg3 driver in kernel 2.6.8.1 (or the official broadcom bcm5700 driver (version 8.1.55) with kernel 2.6.12-rc6) then I get: ------------- telnet xx.x.xxx.xx 25 Trying xx.x.xxx.xx... Connected to xx.x.xxx.xx. Escape character is '^]'. 220 *************** mail to: 250 ok quit 221 test.com Connection closed by foreign host. ------------- So are there any differences in the tg3 driver between 2.6.8.1 and 2.6.12-rc6 that would cause this kind of behaviour ?. I know that SMTP fixup is mostly a poorly implemented Sendmail security fix left over from the pre ESMTP era that cripples SMTP connectivity without offering any real security advantages. So the best thing would be to turn it off, but given that I do not control the firewall and the admin refuses to change it because he believes it to be a security risk then I am looking for another solution (still hoping that it is not shifting NICs in all my servers). Regards. Lars Roland