[SOLVED] Can't update DDNS or Turris software; new to the T.O

I hope ‘General Discussion’ is the right place for this, but I just got a Turris Omnia, and the only way I can get a DDNS update right now is to connect via my old router, a Buffalo WZR-HP-AG300H.

UPDATE: I disabled DNS forwarding, that solved the problem. DDNS is now updating successfully.