[ntp:questions] Re: Cannot configure ntp with pool

Richard B. Gilbert rgilbert88 at comcast.net
Fri Dec 2 13:52:31 UTC 2005


John A. Bailo wrote:

>
> I am unable to get synchronization with my ntpd daemon and the ntp 
> server pool.  I was able to get an initial sync to 0.pool.ntp.org using
>
> [root at IVNWMAIL root]# ntpdate -u pool.ntp.org 
>                             1 Dec 16:30:13 ntpdate[8168]: adjust time 
> server 202.135.38.18 offset 0.089741 sec
>
> and nmap -sU tells me the UPD port 123 is open.
>
> Does anyone have it working and can help with my configuration?
>
> I'm running Redhat 7.3 in line command mode as a mail server, so I 
> need to know the config setting changes I need to make.
>
> When I run:
>
> [root at IVNWMAIL root]# ntpq -p
>
> I see:
>
>      remote           refid      st t when poll reach   delay   offset 
>  jitter
> ============================================================================== 
>
>  LOCAL(0)        LOCAL(0)        10 l    4   64    1    0.000    0.000 
>   0.004
>  levy.catalyst.n 0.0.0.0         16 u    -   64    0    0.000    0.000 
> 4000.00
>  adsl.remco.org  0.0.0.0         16 u    -   64    0    0.000    0.000 
> 4000.00
>  tr.5sn.net      0.0.0.0         16 u    -   64    0    0.000    0.000 
> 4000.00
>  clock2.redhat.c 0.0.0.0         16 u    -   64    0    0.000    0.000 
> 4000.00
>
The "0"s in the "reach" field mean that the server is not reachable.  I 
cannot tell you why they are not reachable but possibilities are:
1. you issued the ntpq -p command a few seconds after starting ntpd.  If 
so, wait ten minutes after starting ntpd, run ntpq -p and report the 
results.
2. Port 123 is being blocked by a firewall.

<snip>




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