[ntp:questions] Re: NTP for dummies

Danny Mayer mayer at ntp.isc.org
Mon Oct 3 02:50:58 UTC 2005


Lee Sailer wrote:
> I do not recall asking you any questions.  Please keep you emails to 
> yourself.
> 
> lee
> 

I don't recall asking you to offer bad advice. You certainly have never 
contributed to NTP.

Danny

> 
> Danny Mayer wrote:
> 
>> Lee Sailer wrote:
>>
>>> This will work.  If you want to get a little fancier, add this to the
>>> ntp.conf file for any host that can access the Internet.
>>>
>>> server us.pool.ntp.org
>>>
>>> You only have to do this on one host.
>>>
>>
>> You should have at least 3 servers. One is not enough. You should also 
>> have more than one NTP server requesting packets from different sources.
>>
>>> Another approach is to put
>>>
>>> broadcastserver yes
>>>
>>> on the Master and
>>>
>>> broadcastclient yes
>>>
>>> on all the others.  (Note:  check the man page for exact syntax of
>>> broadcast directives.
>>>
>> This is invalid. At least if you are going to provide advice makes 
>> sure that the advice is correct. There is no such thing as a Master in 
>> NTP. Maybe you were thinking of DNS?
>>
>> In order to have a broadcast or multicast server you must provide the 
>> broadcast line with a broadcast or multicast IP address. In addition 
>> the configuration won't work as the default for broadcast and 
>> multicast is to require authentication. If you don't want 
>> authentication then you need to understand the risks of doing so and 
>> then you need to add a disable auth to the client.
>>
>>> Last advice to Dummy 8-) 8-)  In my distribution, there is a
>>> default /etc/ntp.conf file that has lots and lots of comments.  It was
>>> a pretty good NTP for Dummies document.  (Should be in the man page,
>>> but say La Vee ("La Vee" 8-)
>>>
>>
>> That is something distributed by your O/S vendor.
>>
>> Danny
>>
>>




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