[KLUG Members] clock synch

[members@kalamazoolinux.org]

FYI,

If you really *Must* use ntpd then:

'grep ntp /etc/services' will show the ports then :
/sbin/iptables -A INPUT -p tcp --dport 123 -s ip.addy.of.server -j ACCEPT
/sbin/itables -A INPUT -p udp --dport 123 -s ip.addy.of.server -j ACCEPT

matt




On Fri, Aug 23, 2002 at 08:21:24PM -0400, bill wrote:
> That's the ticket.  Works fine.  The ntpd wasn't working, even though I tried to set it
> several ways (from command line and from gui).  Makes me wonder if it isn't the firewall
> blocking it.
> 
> As long as I'm root, the rdate works fine.  Putting it in cron is perfect.  I'm thinking
> that if I want to use more than one timeserver, just add a few more lines to cron.
> 
> I also got around to replacing the CMOS battery.  When your clock is -way- off, using
> cron to fix your clock is rather circular reasoning.
> 
> thanks,
> 
> bill
> 
> matt@abernackie.com wrote:
> 
> > rdate works too.. cool thing about this is there is really no configuration
> > and you can run it via cron.
> >
> > ie:
> >
> > 0 0 * * * /usr/bin/rdate -s -l ip.addy.of.server
> >
> > This will via cron, and set systime and log errors to /var/log/messages,
> > rdate uses tcpip and does not leave a daemon running w/an open port .
> >
> > any questions? run 'man rdate'
> >
> > Matt
> >
> > On Fri, Aug 23, 2002 at 06:53:20PM -0400, Dennis wrote:
> > > bill wrote:
> > > >
> > > > In Windows, I had a program I could use to sync the internal clock (which is
> > > > always a bit off, regardless of OS) with some time servers.  I could schedule
> > > > the program to go online once a day and sync the computer's clock against up to
> > > > 15 time servers (I used all of them as some were always down or unavailable on
> > > > the web).  I'm looking to do something similar in Linux.
> > > >
> > > > On Linux RH 7.3 (in gnome) there is a program on the menu called Date/Time
> > > > properties that has an option called "Network Time Protocol" that, if checked,
> > > > allows you to select a single time server.  I tried all the different servers
> > > > for at least 24 hours each while my CMOS battery was dying but none of them
> > > > seemed to work.
> > > >
> > > > Question: does this method work but is somehow failing behind my firewall (using
> > > > an odd port or something)?  Or is there another method to do the same thing,
> > > > maybe find a program to schedule in cron?
> > > >
> > > > kind regards,
> > > >
> > > > bill hollett
> > > >
> > >
> > > I think you might like ntp. It was kind of a bear for this newbie to set
> > > up but it works well once it is set up and working. Lots to read, I read
> > > a lot before I started and still had to have help. If you have any
> > > problems with the config, post again.
> > >
> > > http://www.eecis.udel.edu/~ntp/
> > >
> > > Read, read, read...
> > > --
> > > Dennis
> > > _______________________________________________
> > > Members mailing list
> > > Members@kalamazoolinux.org
> > > 
> >
> > --
> > Matthew Terry
> > matt@abernackie.com
> >
> > .... The cable had passed us by; the dish was the only hope, and eventually
> > we were all forced to turn to it.  By the summer of '85, the valley had more
> > satellite dishes per capita than an Eskimo village on the north slope of
> > Alaska.
> >
> > Mine was one of the last to go in.  I had been nervous from the start about
> > the hazards of too much input, which is a very real problem with these
> > things.  Watching TV becomes a full-time job when you can scan 200 channels
> > all day and all night and still have the option of punching Night Dreams
> > into the video machine, if the rest of the world seems dull.
> > -- Hunter Thompson, "Full-time scrambling", _Generation of Swine_
> > _______________________________________________
> > Members mailing list
> > Members@kalamazoolinux.org
> > 
> 
> _______________________________________________
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> 

-- 
Matthew Terry
matt@abernackie.com

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turn on a red light.
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