Dynadot OpenWRT DDNS URL

[amykyta3]

In case anyone was looking for the URL scheme for DDNS updates to Dynadot, this is it:

https://www.dynadot.com/set_ddns?containRoot=true&domain=[DOMAIN]&ip=[IP]&pwd=[PASSWORD]&subDomain=%40&ttl=600&type=A

In OpenWRT, use the above in a custom service config. [PASSWORD] is the DDNS update password, not your account password.