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Old 11-21-2010, 11:51 PM
Robert Moskowitz
 
Default Strange ntp behaviour?

The following is from my logwatch email:

--------------------- XNTPD Begin ------------------------


XNTPD Killed: 7 Time(s)

XNTPD Started: 8 Time(s)

Total interfaces 8 (non-local: 4)

Total synchronizations 6 (hosts: 1)

Errors
getaddrinfo: "0.centos.pool.ntp.org" invalid host address, ignored: 2 time(s)
getaddrinfo: "1.centos.pool.ntp.org" invalid host address, ignored: 2 time(s)
getaddrinfo: "2.centos.pool.ntp.org" invalid host address, ignored: 2 time(s)

---------------------- XNTPD End -------------------------

Yet from this host I get:

# host 0.centos.pool.ntp.org
0.centos.pool.ntp.org has address 208.53.158.34
0.centos.pool.ntp.org has address 69.50.219.51
0.centos.pool.ntp.org has address 108.76.168.145

So what is NTP doing here; why the errors for getaddrinfo?

Or is this nothing more than 2 out of some many times getaddrinfo failed, but worked just fine enough to count?



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Old 11-22-2010, 03:34 AM
Luigi Rosa
 
Default Strange ntp behaviour?

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Robert Moskowitz said the following on 22/11/10 01:51:

> Yet from this host I get:
>
> # host 0.centos.pool.ntp.org
> 0.centos.pool.ntp.org has address 208.53.158.34
> 0.centos.pool.ntp.org has address 69.50.219.51
> 0.centos.pool.ntp.org has address 108.76.168.145
>
> So what is NTP doing here; why the errors for getaddrinfo?
>
> Or is this nothing more than 2 out of some many times getaddrinfo failed, but worked just fine enough to count?

Could be a temporary failure.

Check actual ntpd status with ntpq -p

In alternative you could use "generic" ntp public pool:

server 0.pool.ntp.org
server 1.pool.ntp.org
server 2.pool.ntp.org
server 3.pool.ntp.org

Or your local ntp public pool: go to http://www.pool.ntp.org/en/ choose your
geographic area from the table on top right of the page then your coutry.

For instance, United States server pool configuration is

server 0.us.pool.ntp.org
server 1.us.pool.ntp.org
server 2.us.pool.ntp.org
server 3.us.pool.ntp.org








Ciao,
luigi

- --
/
+--[Luigi Rosa]--


A day for firm decisions!!!
Or is it?
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Old 11-22-2010, 03:20 PM
Robert Moskowitz
 
Default Strange ntp behaviour?

On 11/21/2010 11:34 PM, Luigi Rosa wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Robert Moskowitz said the following on 22/11/10 01:51:
>
>
>> Yet from this host I get:
>>
>> # host 0.centos.pool.ntp.org
>> 0.centos.pool.ntp.org has address 208.53.158.34
>> 0.centos.pool.ntp.org has address 69.50.219.51
>> 0.centos.pool.ntp.org has address 108.76.168.145
>>
>> So what is NTP doing here; why the errors for getaddrinfo?
>>
>> Or is this nothing more than 2 out of some many times getaddrinfo failed, but worked just fine enough to count?
>>
> Could be a temporary failure.
>
> Check actual ntpd status with ntpq -p
>
> In alternative you could use "generic" ntp public pool:
>
> server 0.pool.ntp.org
> server 1.pool.ntp.org
> server 2.pool.ntp.org
> server 3.pool.ntp.org
>
> Or your local ntp public pool: go to http://www.pool.ntp.org/en/ choose your
> geographic area from the table on top right of the page then your coutry.
>
> For instance, United States server pool configuration is
>
> server 0.us.pool.ntp.org
> server 1.us.pool.ntp.org
> server 2.us.pool.ntp.org
> server 3.us.pool.ntp.org

For all the fiddling I did to set up my own ntp servers for my net, I
should have looked that little bit extra and done this part, rather than
just use the Centos default ntp servers. thanks for the tip.


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