Date: Wed, 22 Jan 2003 08:15:47 +0200 From: "Barry Irwin" <bvi@moria.org> To: "Matthew Zahorik" <matt@hottub.org>, <freebsd-net@freebsd.org> Subject: Re: possible DoS in dc driver Message-ID: <003701c2c1dd$b4a26530$4508a8c0@Beastie> References: <Pine.GSO.4.40.0301210643110.7904-100000@hottub>
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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" <matt@hottub.org> To: "Barry Irwin" <bvi@rucus.ru.ac.za> 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
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