[ntp:questions] Re: time.ucla.edu is closed

user at domain.invalid user at domain.invalid
Mon Sep 11 19:01:00 UTC 2006


Danny,

When I first asked the Number Czar for an NTP port number circa 1980, I 
purposely asked for both a UDP and TCP port, primarily to avoid the 
possibility that some j-random incompatible service might be assigned 
TCP port 123. Secondarily, I wanted to sustain the possibility that some 
NTP monitoring function might in fact wish to use the TCP port. That 
remains a possibility.

Dave

Danny Mayer wrote:

> Felix Tilley wrote:
> 
>>On Sun, 03 Sep 2006 14:51:35 -0700, Wolfgang S. Rupprecht wrote:
>> 
>>
>>>123/tcp ????  
>>>
>>>When was the last time you saw a ntp tcp packet?
>>>
>>>-wolfgang
>>
>>I don't know if NTP uses TCP, UDP or both.  All I know is time.ucla.edu
>>does not respond to ntpdate (Linux version).  This started a few days ago.
>>
> 
> 
> NTP has never used TCP.
> 
> Where did you see that this system has public access? The notice
> attached to the list for tick (time is a CNAME) shows the following:
> 
> AccessDetails: 	 Open access to stratum-2 servers and to UCLA clients.
> 
> So why are you trying to access it?
> 
> Danny
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