Hi,

What a fantastic service. That you can use your own domain for free is a really cool feature. Thanks!
Just thought I'd share the configuration commands for EdgeOS v10.10.
https://www.dynu.com/DynamicDNS/IPUpdateClient/Ubiquiti-EdgeRouter

set service dns dynamic interface <wanif> service dyndns host-name <yourname.dynu.com>
set service dns dynamic interface <wanif> service dyndns login <your Dynu username>
set service dns dynamic interface <wanif> service dyndns password <your Dynu password>
set service dns dynamic interface <wanif> service dyndns server api.dynu.com
set service dns dynamic interface <wanif> web checkip.dynu.com
set service dns dynamic interface <wanif> web-skip 'IP Address'

Regards,

Inny