[gentoo-user] Peer review of ntp.conf file

[gentoo-user] Peer review of ntp.conf file

[John J. Foster]

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Good evening,

After having some recent issues with ntpd (which I'm not certain are
resolved), I decided to take a close look at my /etc/ntp.conf file.

Below are the _only_ lines in /etc/ntp.conf that are not commented out.

restrict 127.0.0.1 nomodify
driftfile /var/lib/ntp/ntp.drift
logfile /var/log/ntp.log
server 0.us.pool.ntp.org
server 1.us.pool.ntp.org
server 2.us.pool.ntp.org

Researching this subject leads me to believe this is one of the more 
difficult subjects to get a good grasp of what is actually taking place
behind the scenes. There appears to be a _lot_ of variables involved
that _could_ have a major impact on operations.

This workstation in the only linux box on this network, and I would like
to be able to serve time to 5 XP boxes if possible. What I'm asking for 
here is 2 things:

1:) Additions and/or changes to ntp.conf, along with the rationale for
them.
2:) A good laymans explanation (or link to) proper ntp configuration and
usage.

Thanks,
festus
-- 
It is not unusual for those at the wrong end of the club to have a
clearer picture of reality than those who wield it.
                                                      Noam Chomsky

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Re: [gentoo-user] Peer review of ntp.conf file

[Teresa and Dale]

John J. Foster wrote:

>Good evening,
>
>After having some recent issues with ntpd (which I'm not certain are
>resolved), I decided to take a close look at my /etc/ntp.conf file.
>
>Below are the _only_ lines in /etc/ntp.conf that are not commented out.
>
>restrict 127.0.0.1 nomodify
>driftfile /var/lib/ntp/ntp.drift
>logfile /var/log/ntp.log
>server 0.us.pool.ntp.org
>server 1.us.pool.ntp.org
>server 2.us.pool.ntp.org
>
>Researching this subject leads me to believe this is one of the more 
>difficult subjects to get a good grasp of what is actually taking place
>behind the scenes. There appears to be a _lot_ of variables involved
>that _could_ have a major impact on operations.
>
>This workstation in the only linux box on this network, and I would like
>to be able to serve time to 5 XP boxes if possible. What I'm asking for 
>here is 2 things:
>
>1:) Additions and/or changes to ntp.conf, along with the rationale for
>them.
>2:) A good laymans explanation (or link to) proper ntp configuration and
>usage.
>
>Thanks,
>festus
>  
>


This is my conf file:

> # generated automatically by net-scripts
> restrict default noquery notrust nomodify
> restrict 127.0.0.1
> driftfile /var/lib/ntp/ntp.drift
> restrict 65.83.241.181 nomodify notrap noquery
> server 65.83.241.181
> restrict 67.32.118.46 nomodify notrap noquery
> server 67.32.118.46


That's the whole thing.  There is a command that I used that picked out
the three servers that has the fastest ping times but I can't remember
what it is.  It's in the ofrums somewhere but I can't find it.

Dale

:-) :-)

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Re: [gentoo-user] Peer review of ntp.conf file

[Jeremy Olexa]

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Teresa and Dale wrote:

> That's the whole thing.  There is a command that I used that picked out
> the three servers that has the fastest ping times but I can't remember
> what it is.  It's in the ofrums somewhere but I can't find it.
> 
> Dale
> 
> :-) :-)
> 

% eix -e netselect
* net-analyzer/netselect
     Available versions:  0.3-r1
     Installed:           0.3-r1
     Homepage:            http://www.worldvisions.ca/~apenwarr/netselect/
     Description:         Ultrafast implementation of ping.


- --
Jeremy Olexa
(olexa@cs.umn.edu)
Office: EE/CS 1-201
CS/IT Systems Staff
University of Minnesota

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Re: [gentoo-user] Peer review of ntp.conf file

[Teresa and Dale]

Jeremy Olexa wrote:

> Teresa and Dale wrote:
>
> >That's the whole thing.  There is a command that I used that picked out
> >the three servers that has the fastest ping times but I can't remember
> >what it is.  It's in the ofrums somewhere but I can't find it.
>
> >Dale
>
> >:-) :-)
>
>
> % eix -e netselect
> * net-analyzer/netselect
>      Available versions:  0.3-r1
>      Installed:           0.3-r1
>      Homepage:            http://www.worldvisions.ca/~apenwarr/netselect/
>      Description:         Ultrafast implementation of ping.
>
>
> --
> Jeremy Olexa
> (olexa@cs.umn.edu)
> Office: EE/CS 1-201
> CS/IT Systems Staff
> University of Minnesota
>

That was it.  This is the command:

> netselect -s 3 pool.ntp.org


That should work.  It did on mine.

Thanks for pushng my brain along.

Dale
:-) :-)
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