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From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows 98; Win 9x 4.90) Description of problem: Since RH Version 7.0 ntptrace timesout when tracing my own ntpd and any other RH7+ active ntpd. NTPD is active on all my systems and seems to keep the clock synced.... ntptrace failes to trace ANY RH7+ system. I have ipchains active and logging but no packets are dropped. It's like ntpd does not respond to ntptrace any more.. How reproducible: Always Steps to Reproduce: 1. edit /etc/ntpd.conf and add a time source 2. run /etc/rc.d/init.d/ntpd start 3. run ntptrace Actual Results: bash-2.04$ /usr/sbin/ntptrace localhost.localdomain: *Timeout* OR bash-2.04$ /usr/sbin/ntptrace 199.201.213.35 host: *Timeout* Expected Results: bash-2.04$ /usr/sbin/ntptrace 199.201.213.1 DS1.154.ALSV1 199.201.213.dynamic.net: stratum 4, offset 0.071681, synch distance 0.02748 border3.s6-2.dynamic-1.ocy.pnap.net: stratum 3, offset 0.001860, synch distance 0.03496 ns1.ocy.pnap.net: stratum 2, offset 0.001812, synch distance 0.03592 clock.isc.org: stratum 1, offset -0.001126, synch distance 0.00587, refid 'GOES' Additional info: ALL Redhat's less than 7.0 seem to work fine.
Also, you do have to wait until ntpd logs a sync loss message. The message tells us that ntpd has actually become a sync server and is active. This usually takes about 10 minutes.
try to disable multicastclient in /etc/ntpd.conf or add multicast ability to the kernel *** This bug has been marked as a duplicate of 29348 ***