bintec elmeg routers (be.IP, RS series) ship with a DynDNS client that can call any DynDNS2 update URL via a freely defined provider. With DNS Beacon your site stays reachable under a permanent hostname even when your WAN IP changes. Here's how to set it up.
Local Services → DynDNS Client → DynDNS Provider → New
Under Local Services → DynDNS Client → DynDNS Provider, create a new provider with this server and update URL. bintec substitutes <domain> with the hostname and <ipaddr> with the current WAN IP; username and password are sent for authentication. Then select this provider in the DynDNS registration.
Create a free DNS Beacon account, add a hostname and generate an API key — then come back and finish the setup above.
Create free account