Dynamic DNS doesn't work
Dynamic DNS for either DynDNS or Dynu doesn't work on M500 cluster [12.6.2] or XTM33 [12.1.3], regardless of external interface status. Relevant domains can be resolved fine in Network Tools in WSM on each device. XTM33 is on a completely different network and on 4G.
M500 log entries:
2020-10-13 20:52:17 YBLT-ACA-M500-2 dyndns Could not resolve server: api.dynu.com msg_id="5A00-0007" Debug
2020-10-13 20:52:17 YBLT-ACA-M500-2 dyndns Could not resolve server: members.dyndns.org msg_id="5A00-0007" Debug
XTM33 log entries [Although it has one external interface failed, should still work on remaining]:
2020-10-13 20:52:38 dyndns Could not connect to api.dynu.com / 126.96.36.199, Network is unreachable id="5A00-0008" Debug