Re: How to use ntp/ntpdate to fix my clock
On Sat, 29 Jan 2000, Ed Cogburn wrote:
> Henrique M Holschuh wrote:
> > Actually, an end-user should have no business contacting public stratum 2
> > servers either, they should use their ISP's timeservers. But not many ISPs
The operative word there is "should".
> Uh Oh. I'll ask my ISP if they have an ntp servver, but I doubt it.
If they don't, then by all means use a public stratum 2 server.
> > Most secondary servers *do require permission to acess* as well. Only they
>
> The list I read from when I set ntpdate up didn't show a "permission
> to access" for the servers I used; I avoided the ones which did.
Well, then there are no problems, are there? :-)
> > > list, write down 3-4 of the secondary servers that are geographically
> > > close, and plug that info into ntpdate's config file.
> >
> > *NO*. At the very least ping them and discard the ones which are too far.
>
> The docs don't say this unfortunately. The "use 3-4 servers" idea
Yeah, I know. The NTP FAQ is still alpha as well, but it did help me a lot
when I was trying to do my first installation. You can find it somewhere in
www.ntp.org, I think.
There *are* reasons for using more than one server in ntpdate, but two
usually provides enough redundancy. I can't see the reason to use more than
three.
> Thanks, you're instructions are more clear than the docs that come
> with ntp/ntpdate. The docs seem to be primarily focused on setting up
And less acurate as well. The docs are your friends...
> a ntp server, not an end-user's situation.
Yes, that's true. Interestingly enough, if you ntpq -p around a bit, you'll
find a lot of "servers" which are not very well configured, at least
redundancy-wise ;-)
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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