From owner-freebsd-net Tue Jan 21 22:18:34 2003 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7FC2E37B401 for ; Tue, 21 Jan 2003 22:18:32 -0800 (PST) Received: from mx1.dev.itouchnet.net (devco.net [196.15.188.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id CEF4443E4A for ; Tue, 21 Jan 2003 22:18:28 -0800 (PST) (envelope-from bvi@moria.org) Received: from nobody by mx1.dev.itouchnet.net with scanned_ok (Exim 3.35 #1) id 18bEHI-000Jxl-00 for freebsd-net@freebsd.org; Wed, 22 Jan 2003 08:22:24 +0200 Received: from devco.net ([196.15.188.2] helo=Beastie) by mx1.dev.itouchnet.net with smtp (Exim 3.35 #1) id 18bEHI-000JxS-00; Wed, 22 Jan 2003 08:22:24 +0200 Message-ID: <003701c2c1dd$b4a26530$4508a8c0@Beastie> Reply-To: "Barry Irwin" From: "Barry Irwin" To: "Matthew Zahorik" , References: Subject: Re: possible DoS in dc driver Date: Wed, 22 Jan 2003 08:15:47 +0200 Organization: Moria Research MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Checked: This message has been scanned for any virusses and unauthorized attachments. X-iScan-ID: 76735-1043216544-17696@unconfigured version $Name: REL_2_0_4 $ Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Hi ran this again with larger values, still no problem. Tried a variety of tests, pining an interface on the DC card, pinging through the BSD box as a gateway. all seems fine (well on 4.3) . To the original reporters, any chances of a dmesg output for the chipsets that are given to exhibiting the problem ? [root@]# ping -s 50000 192.168.8.1 PING 192.168.8.1 (192.168.8.1) from 192.168.7.7 : 50000(50028) bytes of data. 50008 bytes from 192.168.8.1: icmp_seq=0 ttl=255 time=11.330 msec 50008 bytes from 192.168.8.1: icmp_seq=1 ttl=255 time=11.030 msec 50008 bytes from 192.168.8.1: icmp_seq=2 ttl=255 time=19.903 msec 50008 bytes from 192.168.8.1: icmp_seq=3 ttl=255 time=11.038 msec 50008 bytes from 192.168.8.1: icmp_seq=4 ttl=255 time=11.016 msec 50008 bytes from 192.168.8.1: icmp_seq=5 ttl=255 time=11.058 msec [snip] --- 192.168.8.1 ping statistics --- 17 packets transmitted, 17 packets received, 0% packet loss round-trip min/avg/max/mdev = 10.651/11.575/19.903/2.089 ms [root@]# ping -s 80000 192.168.8.1 Error: packet size 80000 is too large. Maximum is 65507 [root@]# ping -s 65507 192.168.8.1 PING 192.168.8.1 (192.168.8.1) from 192.168.7.7 : 65507(65535) bytes of data. 65515 bytes from 192.168.8.1: icmp_seq=0 ttl=255 time=14.406 msec 65515 bytes from 192.168.8.1: icmp_seq=1 ttl=255 time=13.901 msec 65515 bytes from 192.168.8.1: icmp_seq=2 ttl=255 time=13.090 msec 65515 bytes from 192.168.8.1: icmp_seq=3 ttl=255 time=13.842 msec 65515 bytes from 192.168.8.1: icmp_seq=4 ttl=255 time=13.067 msec 65515 bytes from 192.168.8.1: icmp_seq=5 ttl=255 time=13.870 msec 65515 bytes from 192.168.8.1: icmp_seq=6 ttl=255 time=13.048 msec --- 192.168.8.1 ping statistics --- 7 packets transmitted, 7 packets received, 0% packet loss round-trip min/avg/max/mdev = 13.048/13.603/14.406/0.507 ms -- Barry Irwin bvi@itouchlabs.com Tel: +27214875178 Systems Administrator: Networks And Security iTouch TAS http://www.itouchlabs.com Mobile: +27824457210 ----- Original Message ----- From: "Matthew Zahorik" To: "Barry Irwin" Sent: Tuesday, January 21, 2003 4:44 PM Subject: Re: possible DoS in dc driver > On Tue, 21 Jan 2003, Barry Irwin wrote: > > > [root@web1 labsadmin]# ping -s 5000 victim > > Add another zero there and see if it's still happy. The bug report said > anything more then 30KB. > > - Matt > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message