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the command ntpdate -q -4 localhost in an NTP server is making two queries to 127.0.0.1 and one of them fails:

is this failing because of the /etc/hosts file?

ntpdate -q -4 localhost
server 127.0.0.1, stratum 2, offset 0.000006, delay 0.02565
server 127.0.0.1, stratum 0, offset 0.000000, delay 0.00000

/etc/hosts file content:

::1             1a.ncomputers.org 1a localhost
127.0.0.1       1a.ncomputers.org 1a localhost
2a02:c207:2010:6775::1  1b.ncomputers.org 1b
2a02:c205:2009:8290::1  1c.ncomputers.org 1c
5.189.146.13    1b.ncomputers.org 1b
80.241.208.120  1c.ncomputers.org 1c

/etc/ntpd.conf file content:

driftfile /var/lib/ntp/ntp.drift
restrict default kod nomodify nopeer noquery notrap
restrict localhost
server 2001:4ca0:0:103::81bb:fe20
server 2001:638:a000:1123:123::1
server 2001:62a:4:311::123

ntpdate version: 4.2.8p10

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  • Don't think you need to specify "-4" and I suspect a restriction is in place. Can we see your ntp.conf file? Oct 3 '17 at 22:27
  • Thanks so much for your answer. I am a little busy right now, so I will answer you using online content, so that it is easer, and then later answer you better. I am trying what you propose, but still not working, example here ntp.conf in chapter 2.3
    – ncomputers
    Oct 3 '17 at 23:23
1

You might need to add this to your ntp.conf file to allow localhost IPV4 and IPV6 queries:

restrict 127.0.0.1 
restrict ::1

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