I'm working on setting up our own "master clock" servers for our organization
to get NTP time synchronization from.
The design calls for our master clock servers to get their time from several
public NTP servers.
I initially set this up using Fedora Core 13 running as a VMware server inside
our network, and was able to get it to sync up properly:
[r...@coruxdev etc]# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
+time-a.nist.gov .ACTS. 1 u 44 1024 377 13.884 2.153
7.738
+clock.isc.org .GPS. 1 u 815 1024 377 76.939 -6.417
0.171
*time-b.nist.gov .ACTS. 1 u 937 1024 377 12.309 0.460
4.231
I then took that same config and built it on our DMZ VMware environment, and in
spite of being assured that our firewall is allowing UDP 123, I can't get time
sync to work:
[r...@extux66 ~]# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
time-a.nist.gov .INIT. 16 u - 1024 0 0.000 0.000
0.000
clock.isc.org .INIT. 16 u - 1024 0 0.000 0.000
0.000
time-b.nist.gov .INIT. 16 u - 1024 0 0.000 0.000
0.000
I've tried several different NTP troubleshooting documents found on the web,
none have helped. I've turned off iptables that was running on the local
server, that didn't make a difference.
What could possibly be causing this?
Thanks,
Rick Greene
Unix Support
NCO Group
507 Prudential Road
Horsham PA 19044
office: 215-441-3529
fax: 215-441-3886
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