Adjusting time on a secured FreeBSD machine.

Stan junk-it at dslextreme.com
Sat Feb 5 09:43:51 PST 2005


Thanks as well to both of you.  I too learned something new.

Scott Robbins wrote:

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>On Fri, Feb 04, 2005 at 01:41:39PM -0800, Kevin Oberman wrote:
>  
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>>>Date: Fri, 4 Feb 2005 16:29:03 -0500
>>>From: Scott Robbins <scottro at nyc.rr.com>
>>>Sender: owner-freebsd-stable at freebsd.org
>>>
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>>>They do conflict with each other, I'm not sure what will happen if you
>>>have both in rc.conf.  Hopefully ntpdate will run first, then ntpd.  If
>>>ntpd is running then you will get an error message running ntpdate.
>>>
>>>On an unsecured box (the one that I mentioned, where ntpd choked because
>>>the BIOS clock was too far off, I simply stopped ntpd, ran ntpdate and
>>>then restarted ntpd.
>>>      
>>>
>>They do not conflict if you use the flags in defaults/rc.conf.
>>
>>ntpdate -b sets the time ONCE and is run before ntpd starts, the '-b'
>>option will cause it to to set the time absolutely no matter hao far off
>>the clock is at the time. This is exactly how ntpdate is intended to be
>>used.
>>
>>That said, ntpdate is considered obsolete by the ntp folks and may
>>disappear at some time in the future. Their recommendation is to use
>>ntpd with the '-g' flag to force an unconditional clock set and to use
>>the 'iburst' option on your servers in /etc/ntp.conf. I find this works
>>well, but some have complained that it takes too long.
>>    
>>
>
>Thank you.  I have been using ntpd for awhile, and haven't read the man
>pages recently, which I should have done before posting.  I only ran
>into the issue once and solved it as I mentioned.
>
>Thanks again.  I just learned something.
>
>
>- -- 
>
>Scott
>
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>(looks at Buffy, who's not amused) Jeez, crack a book sometime.
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