Is there any particular value that you want me to set snaplen to with the -s option?
Thanks, Mike On Mon, Nov 15, 2010 at 4:29 AM, Chuck Short <chuck.sh...@canonical.com> wrote: > Please try using the -s swtich with tcpdump and see if you can > reproduce. > > thanks > chuck > > ** Changed in: ntp (Ubuntu) > Importance: Undecided => Low > > ** Changed in: ntp (Ubuntu) > Status: New => Incomplete > > -- > NTP client packets always have bad checksum > https://bugs.launchpad.net/bugs/674701 > You received this bug notification because you are a direct subscriber > of the bug. > > Status in “ntp” package in Ubuntu: Incomplete > > Bug description: > Binary package hint: ntp > > UDP packets from my Ubuntu 10.10 NTP client (.143.2) to my NTP server > (.143.13) appear to always have a bad checksum, as reflected here in this > tcpdump capture: (started as "sudo tcpdump -nvv udp port 123") > ----------------------------- > 11:12:46.871451 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP > (17), length 76) > 192.168.143.2.123 > 192.168.143.13.123: [bad udp cksum 1cf6!] NTPv4, > length 48 > Client, Leap indicator: (0), Stratum 4 (secondary reference), poll > 10s, precision -20 > Root Delay: 0.367874, Root dispersion: 0.486328, Reference-ID: > 192.168.143.13 > Reference Timestamp: 3498584143.872812747 (2010/11/12 10:55:43) > Originator Timestamp: 3498584143.811634063 (2010/11/12 10:55:43) > Receive Timestamp: 3498584143.872812747 (2010/11/12 10:55:43) > Transmit Timestamp: 3498585166.871437788 (2010/11/12 11:12:46) > Originator - Receive Timestamp: +0.061178639 > Originator - Transmit Timestamp: +1023.059803709 > 11:12:46.873147 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP > (17), length 76) > 192.168.143.13.123 > 192.168.143.2.123: [udp sum ok] NTPv4, length 48 > Server, Leap indicator: (0), Stratum 3 (secondary reference), poll > 10s, precision -14 > Root Delay: 0.367065, Root dispersion: 0.405197, Reference-ID: > 149.20.54.20 > Reference Timestamp: 3498580747.587430417 (2010/11/12 09:59:07) > Originator Timestamp: 3498585166.871437788 (2010/11/12 11:12:46) > Receive Timestamp: 3498585166.812102258 (2010/11/12 11:12:46) > Transmit Timestamp: 3498585166.812599122 (2010/11/12 11:12:46) > Originator - Receive Timestamp: -0.059335514 > Originator - Transmit Timestamp: -0.058838650 > ----------------------------- > This is my first bug report, so hopefully I've included everything that is > needed. If not, please let me know what else is needed and I'll do my best to > get it. > > Thanks! > > ProblemType: Bug > DistroRelease: Ubuntu 10.10 > Package: ntp 1:4.2.4p8+dfsg-1ubuntu6 > ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4 > Uname: Linux 2.6.35-22-generic x86_64 > NonfreeKernelModules: nvidia > Architecture: amd64 > Date: Fri Nov 12 11:11:46 2010 > EcryptfsInUse: Yes > ExecutablePath: /usr/sbin/ntpd > InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) > NtpStatus: > remote refid st t when poll reach delay offset jitter > ============================================================================== > *nematode.local 149.20.54.20 3 u 964 1024 377 0.816 -60.770 > 5.488 > ProcAttrCurrent: /usr/sbin/ntpd (enforce) > ProcEnviron: > > SourcePackage: ntp > mtime.conffile..etc.ntp.conf: 2010-11-10T10:30:46.779535 > > To unsubscribe from this bug, go to: > https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/674701/+subscribe > -- NTP client packets always have bad checksum https://bugs.launchpad.net/bugs/674701 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to ntp in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
