no-ip.org

Welcome! CLI: config system ddns edit <index_int> set ddns-domain <ddns_domain_name> set ddns-password <ddns_password> set ddns-server <ddns_service> set ddns-username <ddns_username> set monitor-interface <interfaces> end

Thanks! That was one of the first things i tried since it is the most logical but it fails on the ddns-server as the no-ip server is not in the list of default servers supported.

What happens if you enter it as a generic DDNS server?

 config system ddns    ddns-server genericDDNS    ddns-server-ip <ipv4_addr>  end

I' ve tried that too and when I choose Generic I loose the authentication option, ddns-username and ddns-password. From what I understand the GenericDDNS option only supports DDNS service providers that supports RFC2136 which no-ip.org doesn' t... as far as i know.