[ntp:questions] Re: What does 73.78.73.84 refer to?
Danny Mayer
mayer at ntp.isc.org
Thu Nov 10 03:28:30 UTC 2005
Martin Burnicki wrote:
> Heiko Gerstung wrote:
>
>
>>Tim wrote:
>>
>>>I see "73.78.73.84" as the refid for the local clock on one of my
>>>machines (running Fedora Core 4 Linux, if that helps), and I can't figure
>>>out where it gets that from, nor what it means.
>>
>>73 is the ASCII code for "I", 78 is "N", another 73 "I" and finally 84
>>stands for "T"... therefore 73.78.73.84 is "INIT"... there was a bug in
>>certain versions of NTP where the refid of the LOCALCLK driver was not
>>set correctly. If you really care about that, you can fudge the refid to
>>something else.
>
The refid should NOT be fudgeable, it's meant for loop prevention.
> [...]
>
>>IIRC it was only a display problem and had no other
>>drawbacks..
>
>
> .. beside the fact that ntpq may try to do DNS reverse lookups on that
> number, which will not give any useful result, but introduce delays until
> the DNS query times out:
> # host 73.78.73.84
> Host 84.73.78.73.in-addr.arpa not found: 2(SERVFAIL)
>
It shouldn't, it's the refid and not an IPv4 address.
Danny
> Martin
More information about the questions
mailing list