xntpd sendto (possible hack?)

[Paul Howarth]

Lovell Mcilwain wrote:
> 
> 
> Paul Howarth wrote:
> 
>> Lovell Mcilwain wrote:
>>
>>> Hello all,
>>>
>>> I just installed a logwatch on my machine and ran it for the first 
>>> time just a few minutes ago.  It showed me something very interesting 
>>> and it was the only thing in the logwatch log.  Just a bunch of the 
>>> same entries.  The IP address varied but most of them looked like 
>>> invalid arguments except for about 3 of them that didn't.  See below:
>>>
>>> --------------------- XNTPD Begin ------------------------
>>> **Unmatched Entries**
>>> .....
>>> sendto(80.190.233.67): Invalid argument
>>> synchronized to 80.190.233.67, stratum 2
>>> synchronized to 80.33.117.152, stratum 3
>>> sendto(80.190.233.67): Invalid argument
>>> .....
>>> ---------------------- XNTPD End -----------------------
>>>
>>> Does anyone know what this means or can this possibly mean that my 
>>> system has been hacked?
>>
>>
>>
>> These entries mean that some of the ntp servers you're using (probably 
>> results returned from lookups of pool.ntp.org) aren't responding 
>> reliably. This is not unusual and may be a result of issues with your 
>> own network link.
>>
>> Paul.
>>
> I did check my preferences for my time server and found that I didn't 
> have a time server specified even though I had ntp enabled.  I guess my 
> other question is, if I don't manually specify one, does it choose from 
> any of the other ones as a default?  I noticed in my ntp.conf file there 
> a bunch of time servers listed.  But does it restrict itself to the # 
> --- OUR TIMESERVERS ----- section?

What's the output of:
$ grep '^[^#]*server' /etc/ntp.conf

Paul.