tried several DDNS services, none would work. currently it states "connected", but I don't know how long it will. I am using a DDNS client on my server PC now to "help" the dlink router if it fails there.
I just noticed many router features are not really stable. DDNS is reported in many forums to be kind of buggy. and website filtering is not working, too. It filters keywords, but not URLs. So sad. Next router will be another brand for sure.