Turn ntpd off by using "service ntpd stop".  Then issue the "ntpdate
clock.redhat.com" command.  This will sync your clock with that time
server.  Now turn NTPd back on with "service ntdp start".

--
Chris Purcell, RHCE

>> > Check your log messages again.  Your post showed that you're getting
>> an "invalid host" error when trying to find time.nist.gov.  You can
>> either try their ip, which is 192.43.244.18, or you can use a linux
>> timeserver, such as ntp.tuxfamily.net.
>>
>>
>> yeah that is a strange error:
>>
>> from my /etc/ntp.conf file
>>
>> ---- snip -----
>>
>> server time.nist.gov
>> fudge  time.nist.gov stratum 10
>>
>> ---- snip ----
>>
>> hostname resolution is found:
>>
>> [etc]# host time.nist.gov
>> time.nist.gov. has address 192.43.244.18
>
> Noah,
>
> Okay, I did some more checking.  Just because the host resolves does
> *not* mean that it is actually serving the ntpd service.  You can tell
> if it is or not (I think, since I can't find a man entry) by typing
> "ntpq <hostname>". When I tried that on the time.nist.gov server, I
> didn't get anything.  Ditto when I tried ntp.tuxfamily.net.  However,
> when I tried it against
> clock.redhat.com, I got a response.  Try changing your ntp.conf to
> clock.redhat.com.
>
> Also, check that ntp is open on your iptables.  Try "iptables -L".  You
> should see a couple of lines something like:
>
> ACCEPT     udp  --  clock.redhat.com     anywhere           udp spt:ntp
> dpt:ntp
> ACCEPT     udp  --  clock.redhat.com     anywhere           udp spt:ntp
> dpt:ntp
>
> The ntp daemon is supposed to automatically open the iptables firewall,
> but you might need to restart the service (service ntpd restart) to do
> it.
>
> Ben
>
>
> --
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