[ntp:questions] Pool returns IPv6 address to IPv4 query

A C agcarver+ntp at acarver.net
Mon Nov 18 19:08:24 UTC 2013


One of the North America pool DNS round-robins (I think it was
2.north-america.pool.ntp.org) returned an IPv6 address to a system that
made only an IPv4 request.  So right now I have a server that ntpd
thinks is broken because of the DNS confusion.

Note the last line in the billboard below.  My machine does not have
IPv6 enabled and DNS requests are passed on to my router which also does
not have IPv6 enabled.  For that matter, there is no IPv6 provided by my
ISP and I don't have any IPv6 tunnels (e.g. Hurricane Electric).

I'll eventually get around to restarting ntpd and this will probably
resolve itself but someone should check that the round-robin DNS queries
are answered with the appropriate answer for the calling system.


     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
o127.127.22.0    .PPS.            0 l    5   16  377    0.000    0.007
 0.122
-127.127.28.0    .GPSD.           4 l    4   16  377    0.000  108.331
 9.063
-65.49.70.243    204.123.2.72     2 u  269  512  377   37.361   -1.433
 0.563
+64.246.132.14   .CDMA.           1 u   42  512  377  103.045    3.111
 0.412
+199.102.46.72   .GPS.            1 u  450  512  377   94.050    4.697
 0.285
+50.116.55.161   192.5.41.40      2 u  458  512  377  112.834    1.710
 1.507
 2001:470:79::14 .INIT.          16 -    - 1024    0    0.000    0.000
 0.000



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