I have gone through various sites describing on how to setup NTP and also troubleshooting. Even then, I have problems. It is described as under:
My NTP server is running on Windows 2003. It is also a PDC. It gets its time through a GPS based solution. While all my workstations running on XP / 2000 / Vista gets synchronized from the PDC, the problem lies in the linux based server(s).
One of them is a RedHat Fedora 3. As per the instructions, I have opened port 123 on the PDC and it is tagged as "Listening and Filtered".
When I ran ntpq -p on the linux box and here is the result :
Code:
remote refid st t when poll reach delay offset jitter
==============================================================================
192.168.1.30 .INIT. 16 u - 1024 0 0.000 0.000 4000.00
bhadra.appsoft. .INIT.16 u - 1024 0 0.000 0.000 4000.00
blaze.appsoft.a .INIT. 16 u - 1024 0 0.000 0.000 4000.00
*LOCAL(0) LOCAL(0)10 l 57 64 377 0.000 0.000 0.008
192.168.1.30 .INIT. 16 u - 1024 0 0.000 0.000 4000.00
blaze.appsoft.a .LOCL. 1 u 253 1024 377 0.302 -195830 32207.7
bhadra.appsoft. .LOCL. 1 u 249 1024 377 0.548 -195748 35514.7
_______________________________________________________________
Blaze happens to be the PDC.
When I restarted ntpd service, it got synched with a remote ntp server (0.in.pool.ntp.org).
But when I run ntpdate, I get the following :
Code:
ntpdate -d 192.168.1.30
5 May 14:19:46 ntpdate[30360]: ntpdate 4.2.0a@1.1190-r Mon Oct 11 09:10:21 EDT 2004 (1)
Looking for host 192.168.1.30 and service ntp
host found : 192.168.1.30
transmit(192.168.1.30)
transmit(192.168.1.30)
transmit(192.168.1.30)
transmit(192.168.1.30)
transmit(192.168.1.30)
192.168.1.30: Server dropped: no data
server 192.168.1.30, port 123
stratum 0, precision 0, leap 00, trust 000
refid [192.168.1.30], delay 0.00000, dispersion 64.00000
transmitted 4, in filter 4
reference time: 00000000.00000000 Thu, Feb 7 2036 6:28:16.000
originate timestamp: 00000000.00000000 Thu, Feb 7 2036 6:28:16.000
transmit timestamp: cf8bfd05.ed7bb730 Wed, May 5 2010 14:19:49.927
filter delay: 0.00000 0.00000 0.00000 0.00000
0.00000 0.00000 0.00000 0.00000
filter offset: 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000
delay 0.00000, dispersion 64.00000
offset 0.000000
5 May 14:19:50 ntpdate[30360]: no server suitable for synchronization found
on the Linux box. The first command may show a 1, but the second should return 0. If it doesn't, check again if the NTP service is running, and Port 123/UDP is allowed incoming and outgoing on both sides.
Yes. It shows 1 for the first command while it returned a 0 for the second.
I ran ntpdate on an impulse once again and this is what I have got :
Code:
5 May 15:03:25 ntpdate[30484]: ntpdate 4.2.0a@1.1190-r Mon Oct 11 09:10:21 EDT 2004 (1)
Looking for host 192.168.1.30 and service ntp
host found : blaze.appsoft.accord.com
transmit(192.168.1.30)
receive(192.168.1.30)
transmit(192.168.1.30)
receive(192.168.1.30)
transmit(192.168.1.30)
receive(192.168.1.30)
transmit(192.168.1.30)
receive(192.168.1.30)
transmit(192.168.1.30)
server 192.168.1.30, port 123
stratum 1, precision -6, leap 00, trust 000
refid [LOCL], delay 0.04144, dispersion 0.00067
transmitted 4, in filter 4
reference time: cf8baec3.0c189374 Wed, May 5 2010 8:45:55.047
originate timestamp: cf8bb67c.48000000 Wed, May 5 2010 9:18:52.281
transmit timestamp: cf8c073d.72bca537 Wed, May 5 2010 15:03:25.448
filter delay: 0.04622 0.04147 0.04147 0.04144
0.00000 0.00000 0.00000 0.00000
filter offset: -20673.1 -20673.1 -20673.1 -20673.1
0.000000 0.000000 0.000000 0.000000
delay 0.04144, dispersion 0.00067
offset -20673.167045
5 May 15:03:25 ntpdate[30484]: step time server 192.168.1.30 offset -20673.167045 sec
-------------------------------------------
So, the windows server is responding. However what is bothering me that the time is not getting synched. I changed the time by 10 minutes on the windows server and ran ntpdate once again, but the time on the linux box did not change. Am i doing something wrong ?
Regards
Jagdish
Edit by pludi: please use [code][/code] tags, or the '#' button for code and listings
Last edited by pludi; 05-05-2010 at 06:45 AM..
Reason: code tags, please...
Because the -d switch tells ntpdate to run in debug mode without modifying the clock (see man ntpdate). If you want to run ntpdate, first stop the ntp daemon itself and start it again afterwards, as both bind to the local port 123, and would conflict otherwise.
LANG=C date
Wed May 5 17:05:25 UTC 2010
LANG=C date -u
Wed May 5 17:06:02 UTC 2010
ntpdate 192.168.1.30
5 May 11:24:07 ntpdate[30748]: step time server 192.168.1.30 offset -20549.160995 sec
LANG=C date
Wed May 5 11:24:36 UTC 2010
LANG=C date -u
Wed May 5 11:24:53 UTC 2010
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