Re: correct way to set timezone & clock/date?

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Author: Eric Shubert
Date:  
To: plug-discuss
Subject: Re: correct way to set timezone & clock/date?
Here's what I get on a test server of mine:
[root@dellefield ~]# ntpdate -v -d dewey.lib.ci.phoenix.az.us ntp.drydog.com
25 Aug 12:28:28 ntpdate[6149]: ntpdate 4.2.2p1@1.1570-o Tue May 19 
13:58:06 UTC 2009 (1)
Looking for host dewey.lib.ci.phoenix.az.us and service ntp
host found : dewey.lib.ci.phoenix.az.us
Looking for host ntp.drydog.com and service ntp
host found : rrcs-66-27-60-10.west.biz.rr.com
transmit(148.167.132.200)
receive(148.167.132.200)
transmit(148.167.132.200)
receive(148.167.132.200)
transmit(148.167.132.200)
transmit(66.27.60.10)
receive(148.167.132.200)
transmit(148.167.132.200)
receive(148.167.132.200)
transmit(148.167.132.200)
receive(66.27.60.10)
transmit(66.27.60.10)
receive(66.27.60.10)
transmit(66.27.60.10)
receive(66.27.60.10)
transmit(66.27.60.10)
receive(66.27.60.10)
transmit(66.27.60.10)
server 148.167.132.200, port 123
stratum 2, precision -20, leap 00, trust 000
refid [148.167.132.200], delay 0.09081, dispersion 0.01126
transmitted 4, in filter 4
reference time:    ce3eb3eb.9159d1f0  Tue, Aug 25 2009 12:03:07.567
originate timestamp: ce3eb9de.49e55521  Tue, Aug 25 2009 12:28:30.288
transmit timestamp:  ce3eb9de.43a0f909  Tue, Aug 25 2009 12:28:30.264
filter delay:  0.11383  0.13196  0.11774  0.09081
          0.00000  0.00000  0.00000  0.00000
filter offset: 0.002299 0.012727 0.005610 -0.00813
          0.000000 0.000000 0.000000 0.000000
delay 0.09081, dispersion 0.01126
offset -0.008137


server 66.27.60.10, port 123
stratum 2, precision -21, leap 00, trust 000
refid [66.27.60.10], delay 0.28584, dispersion 0.00227
transmitted 4, in filter 4
reference time:    ce3eb980.f314d607  Tue, Aug 25 2009 12:26:56.949
originate timestamp: ce3eb9df.19c5555c  Tue, Aug 25 2009 12:28:31.100
transmit timestamp:  ce3eb9de.f711a543  Tue, Aug 25 2009 12:28:30.965
filter delay:  0.29257  0.28622  0.28584  0.30823
          0.00000  0.00000  0.00000  0.00000
filter offset: 0.002869 0.004561 0.005198 -0.00578
          0.000000 0.000000 0.000000 0.000000
delay 0.28584, dispersion 0.00227
offset 0.005198


25 Aug 12:28:31 ntpdate[6149]: adjust time server 148.167.132.200 offset
-0.008137 sec
[root@dellefield ~]#

So the ntp servers are ok. Are you in a position to stop the firewall
momentarily for a test to be sure that's where your blockage is?

Steven A. DuChene wrote:
> I ran the following:
>
> ntpdate -v -d dewey.lib.ci.phoenix.az.us ntp.drydog.com
>
> and it looked for and found both hosts but then just sits there with
> no other output.
> --
> Steve
>
>
>     -----Original Message-----
>     From: Eric Cope
>     Sent: Aug 25, 2009 3:10 PM
>     To: Main PLUG discussion list
>     Subject: Re: correct way to set timezone & clock/date?

>
>     You can force an update, instead of waiting on the incremental
>     changes. But, as noted below, it may affect services.
>     Eric

>
>     On Tue, Aug 25, 2009 at 11:42 AM, Jon M. Hanson
>     < <mailto:jon@the-hansons-az.net>> wrote:

>
>         ntp also adjusts your clock gradually so it won't immediately
>         jump to
>         the correct time. This is to prevent problems with services
>         (like cron
>         and logging) that depend on a clock that doesn't suddenly change.

>
>         Sent from my iPhone

>
>         On Aug 25, 2009, at 11:33 AM, Alex Dean <
>         <mailto:alex@crackpot.org>> wrote:

>
>          > Try tailing /var/log/messages (you said this was fedora, right?)
>          > when you start up the ntp daemon.  It can take a while (>1 minute
>          > sometimes) for the time servers to synchronize, but you
>         should see
>          > some log activity during that time to show you that it's working.
>          >
>          > alex

>          >
>          > On Aug 25, 2009, at 1:27 PM, Steven A. DuChene wrote:

>          >
>          >> Hmm, so I did the following:

>          >>
>          >> # iptables -A input_ext -p tcp -m tcp --dport 123 -j ACCEPT

>          >>
>          >> and then tried starting ntp services again but it still
>         seems to hang
>          >> when trying to get the initial date and time. So adding a
>         rule to the
>          >> firewall for tcp access on port 123 seems to have made no
>         difference
>          >> to my problem.

>          >>
>          >> nuts...
>          >> --
>          >> Steve

>          >>
>          >> -----Original Message-----
>          >>> From: "
>         <mailto:kitepilot@kitepilot.com>" <
>         <mailto:kitepilot@kitepilot.com>>
>          >>> Sent: Aug 25, 2009 2:13 PM
>          >>> To: "Steven A. DuChene" <
>         <mailto:linux-clusters@mindspring.com>>, Main PLUG
>          >>> discussion list <
>         <mailto:plug-discuss@lists.plug.phoenix.az.us>>
>          >>> Subject: Re: correct way to set timezone & clock/date?

>          >>>
>          >>> From /etc/services

>          >>>
>          >>> ntp             123/tcp
>          >>> ntp             123/udp                         # Network Time
>          >>> Protocol

>          >>>
>          >>> I would use "ntp" instead of "udp", and if it doesn't work,
>         take a
>          >>> dump...
>          >>> :)
>          >>> ET

>          >>>

>          >>
>          >> ---------------------------------------------------
>          >> PLUG-discuss mailing list -
>         
>         <mailto:PLUG-discuss@lists.plug.phoenix.az.us>
>          >> To subscribe, unsubscribe, or to change your mail settings:
>          >> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss

>          >>

>          >
>          > ---------------------------------------------------
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>
>
>
>
>     -- 
>     Eric Cope
>     http://cope-et-al.com

>
>



--
-Eric 'shubes'

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