PackagE: ntpsec-ntpdate Version: 1.1.3+dfsg1-2+deb10u1 Severity: important
I ran into this using Maemo Leste, which uses Buster packages, but the problem seem to exist also in Debian. The problem is simply that when ntpdate from ntpsec-ntpdate is given a list of DNS names where some of them resolve to IPv6 addresses, on a machine where IPv6 is not working, ntpdate will fail completely even if several of the hosts behind the DNS names are working fine. It can look like this: root@devuan-n900:~# /usr/sbin/ntpdate -b 0.debian.pool.ntp.org 1.debian.pool.ntp.org 2.debian.pool.ntp.org 3.debian.pool.ntp.org ntpdig: socket error on transmission: [Errno 101] Network is unreachable root@devuan-n900:~# route -n I've verified using strace that one of the IPv6 addresses causes the problem. When trying the same with the ntpdate version in the ntpdate 1.1.3+dfsg1-2+deb10u1 package, the same command line work. I found <URL: https://bugs.debian.org/293793 > with a patch for ntpdate to solve what seem to be this exact problem, applied 15 years ago. Could it be that this approach will solve the issue also for ntpsec-ntpdate? -- Happy hacking Petter Reinholdtsen
