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I have 5 servers running on RHEL 4 update 4, namely L2, L6, L15, L16 and L18. All the servers are running in NTP for time synchronization. L6, L15, L16 and L18 are synchronizing time from L2. There is no issue in it.
But my requirement is to synchronize time of L2 with windows 2000 AD Time running on U1 server, which is synchronized with some NTP Server. An NTP service is running on U1. In the ntp.conf of L2 has been directed to sync time from U1 but it is always sync to local.
[root@l2 ~]# ntpq -p
remote refid st t when poll reach delay offset jitter
u1.xxxad.com 0.0.0.0 2 u 51 64 0 0.000 0.000 4000.00
*LOCAL(0) LOCAL(0) 3 l 50 64 37 0.000 0.000 0.004
Now, What I like know is how to synchronize with Windows 2000 AD time? What changes required in ntp.conf in L2, if any, or what are the parameters or services needs to be checked in U1 so that it can sync L2?
I think the problem is that the Windows machine may be synchronizing but it isn't running the NTP server service. If it were running NTP server service then you would just be able to point the NTP client on Linux to that Windows machine. If that isn't working then I think that the Windows machine needs to be configured as an NTP server.
IIRC, Windows Time Service might only be a SNTP server, and not a full NTP server. There's no problem for a SNTP client to sync time with a NTP server, but I'm not sure if its possible for an NTP client to sync time with a SNTP server.
works quite nicely for me. I have a phone system purposely VLANed out of being able to contact NTP servers on the internet. The CEO complains that the time on the phone system (CENTOS) is off by minutes. Routing is set up so that it can communicate to the other subnet. This fix worked great.