Some people expressed doubts that ddns updates were properly being enforced after a certain number of days (configured on the webui). Since for a rare occasion I actually broke a month of uptime on my primary router...
Code:
Sep 19 03:17:34 watchdog: Forced DDNS update (after 21 days)
Sep 19 03:17:34 rc_service: watchdog 1130:notify_rc restart_ddns