NTP client packets always have bad checksum
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
ntp (Ubuntu) |
Expired
|
Low
|
Unassigned |
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.
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.
Originator Timestamp: 3498584143.
Receive Timestamp: 3498584143.
Transmit Timestamp: 3498585166.
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.
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.
Originator Timestamp: 3498585166.
Receive Timestamp: 3498585166.
Transmit Timestamp: 3498585166.
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+
ProcVersionSign
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelMo
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.
Please try using the -s swtich with tcpdump and see if you can reproduce.
thanks
chuck