[ntp:questions] Standalone time server

Danny Mayer mayer at ntp.org
Thu May 21 20:41:38 UTC 2009


Sullivan, George E. wrote:
> Greetings all,
> 
> Well for now I've got my ssh public keys combined on the affected
> systems so root can login without a password.  Now, with a simple script
> I am able to use the date command and update the time on the clients via
> the ntpdate command used in a cronjob. 
> 
> It works, though I'd love a real ntp solution.  
> 

You didn't see my response about Orphan mode?

Danny

> Thanks.
> George Sullivan
> SAIC IISBU
> Columbia, Md.
> 
> -----Original Message-----
> From: questions-bounces+sullivang=saic.com at lists.ntp.org
> [mailto:questions-bounces+sullivang=saic.com at lists.ntp.org] On Behalf Of
> Sullivan, George E.
> Sent: Thursday, May 14, 2009 8:53 AM
> To: questions at lists.ntp.org
> Subject: [ntp:questions] Standalone time server
> 
> First I want to apologize for asking this question.  I've looked online
> for an answer to it and there seems to be a lot of questions like it.
> But I haven't yet found a definitive answer.  Maybe I'm not phrasing the
> search query correctly.
> 
> First is this even possible?  I have a server I want to be a time
> server. It can NOT connect to the Internet.  It can NOT receive a signal
> from some attached device. It can NOT receive a signal from a wireless
> source.  All this is due to security constraints.  So the source of time
> updates will be human initiated.  I'll have to act as the "time source"
> and manually via the "date" command, enter the time.  I'll have to get
> the time from an online source such as one of those atomic clock sites
> or one of the real Internet Time Servers and set this server's clock
> manually. Super/extreme accuracy is not critical, but keeping the
> systems within a few seconds of each other would be nice.  I've noticed
> some of my systems stray as much as a few minutes over a week or two.
> 
> So if this server can act as a human updated time server, then my
> clients can potentially use the ntpd to update themselves or even use
> ntpdate in a cronjob to update themselves.  Either is ok for my needs.
> 
> So, if this is possible what would my server's ntp.conf file look like?
> Are there other files, instead, I need to configure?
> 
> Lastly, thanks to all you ntp gurus for considering this and for perhaps
> helping.  Obviously you can tell I'm not proficient at working with ntp.
> 
> TECH:	Red Hat Enterprise Linux Advanced Server Version 5.3.
> 	NTP Version 4.2.2, actual RPM name is ntp-4.2.2p1-7.el5
> 	32 Bit, x86 Dell 2950
> 	Clients - a mix of Red Hat 3 update 4,5,6,7,8 and some Red Hat
> 4.
> 
> Regards
> 
> George Sullivan
> SAIC IISBU
> Columbia, Md.
> 
> 
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