Busybox-ntpd only works on LAN, not on WLAN

I’ve installed/uninstalled everything via LuCi.

  • uninstalled ntpclient (but it returned)
  • installed ntpd
root@turris:~$ opkg list-installed | grep ntp
ntp-utils - 4.2.8p13-1
ntpclient - 2010_365-2
ntpd - 4.2.8p13-1
ntpdate - 4.2.8p13-1

Indeed, the enable_server '1' line was missing in my /etc/config/system, but adding it and rebooting the Omnia did not change anything:

root@turris:~$ grep ntp /var/log/messages
2019-06-12 21:09:29 err ntpdate[2379]: name server cannot be used: Try again (-3)
2019-06-12 21:09:29 notice root[]: starting ntpclient
2019-06-12 21:09:35 notice ntpdate[2588]: step time server 176.9.100.86 offset 0.013785 sec
2019-06-12 21:09:41 notice ntpd[3649]: ntpd 4.2.8p13@1.3847-o Thu Apr 11 14:04:22 UTC 2019 (1): Starting
2019-06-12 21:09:41 info ntpd[3649]: Command line: /sbin/ntpd -g -u ntp:ntp -p /var/run/ntpd.pid -n
2019-06-12 21:09:41 info ntpd[3649]: proto: precision = 0.800 usec (-20)
2019-06-12 21:09:41 info ntpd[3649]: basedate set to 2019-03-30
2019-06-12 21:09:41 info ntpd[3649]: gps base set to 2019-03-31 (week 2047)
2019-06-12 21:09:41 info ntpd[3649]: Listen and drop on 0 v6wildcard [::]:123
2019-06-12 21:09:41 err ntpd[3649]: unable to bind to wildcard address 0.0.0.0 - another process may be running - EXITING
2019-06-12 21:09:51 info procd[]: Instance sysntpd::instance1 s in a crash loop 6 crashes, 0 seconds since last crash
root@turris:~$ netstat -atulpen | grep 123
udp        0      0 46.223.141.10:123       213.209.109.44:123      ESTABLISHED 2653/ntpclient

this is exactly the problem that was described in the instructions I followed (see link in original post):

  1. Uninstall ntpclient (otherwise, it takes the port 123)