[ntp:questions] NTP does not reply to IP addresses that start with 69

David L. Mills mills at udel.edu
Wed Apr 2 23:48:55 UTC 2008


You are right. The oldest version I have here is 4.1.2 circa July 2003 
and the port check had been removed. Also, my warning to not change 
ntp_proto.c without my permission was not in that version. So, nobody 
did anything wrong, just misguided. I just don't want somthing to leave 
here not in spec, and that port check has been illegal since 1992.

The current NTPv4 ntent is that source port 123 is required only for 
symmetric modes. Previously it was required for all modes.


Ronan Flood wrote:
> "David L. Mills" <mills at udel.edu> wrote:
>>I was afraid this might happen. There is no such port check in the 
>>development branch
> Relax, Dave: the original poster is running old code, version 4.1.0.
> This port check was removed in 2002.

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