I have a laptop running a version of Linux ( 3.12 ). I have ntpd installed and
configured to sync with
time.google.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__time.google.com_&d=DwMFAg&c=ilBQI1lupc9Y65XwNblLtw&r=wuJ3SCTwEkewcD5nPmQG4miH-KGwnlEAU83WIThJ8jo&m=NepU8rkWWZFJW4eU5iwlqpKP1UqBmM1FPjFwjjSxzIw&s=e8JX9WJi0A6L-reJb92zH1grUPooZYmdTMdG3QTm2Q0&e=>.
The problem I am having is if I am plugged into a network that only provides
an IPV4 address, ntp's dns is using the ipv6 address:
root@Node00b01973d6cc:~# ntpq -pn
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 .LOCL. 10 l 7 64 1 0.000 0.000 0.002
ff0e::101 .MCST. 16 M - 64 0 0.000 0.000 0.002
2001:4860:4806: .INIT. 16 u - 64 0 0.000 0.000 0.000
Now, if I force ntpd to use only ipv4 DNS with the -4 option, everything works
fine
root@Node00b01973d6cc:~# ntpq -pn 172.16.17.111
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 .LOCL. 10 l 60 64 1 0.000 0.000 0.002
216.239.35.12 .GOOG. 1 u 57 64 1 29.278 341.883 0.002
But I don't want to do this because if I go to a network that only gives ipv6
addresses this will fail. Is there a way to configure ntp to only use ipv4 ( or
ipv6 ) if my interface actually has an ip address in that family?
Thank you,
Tim
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