correct way to set timezone & clock/date?
Steven A. DuChene
linux-clusters at mindspring.com
Tue Aug 25 12:43:24 MST 2009
Hmm, Here it never starts doing those transmit packets after locating the servers.
I just tried it with the firewall turned off and I still get the same result so it must not be the firewall.
I am on a Cox cable modem. I wonder if Cox blocks NTP on their network?
--
Steve
-----Original Message-----
>From: Eric Shubert <ejs at shubes.net>
>Sent: Aug 25, 2009 3:33 PM
>To: plug-discuss at lists.plug.phoenix.az.us
>Subject: Re: correct way to set timezone & clock/date?
>
>Here's what I get on a test server of mine:
>[root at dellefield ~]# ntpdate -v -d dewey.lib.ci.phoenix.az.us ntp.drydog.com
>25 Aug 12:28:28 ntpdate[6149]: ntpdate 4.2.2p1 at 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 at 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
>> <jon at the-hansons-az.net <mailto:jon at 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 <alex at crackpot.org
>> <mailto:alex at 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: "kitepilot at kitepilot.com
>> <mailto:kitepilot at kitepilot.com>" <kitepilot at kitepilot.com
>> <mailto:kitepilot at kitepilot.com>>
>> >>> Sent: Aug 25, 2009 2:13 PM
>> >>> To: "Steven A. DuChene" <linux-clusters at mindspring.com
>> <mailto:linux-clusters at mindspring.com>>, Main PLUG
>> >>> discussion list <plug-discuss at lists.plug.phoenix.az.us
>> <mailto:plug-discuss at 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
>> >>>
>> >>
>> >> ---------------------------------------------------
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>> >
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>>
>>
>> --
>> Eric Cope
>> http://cope-et-al.com
>>
>>
>
>
>--
>-Eric 'shubes'
>
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