I have exactly the same issue with the HG659: I have a secure webserver https and I would like to access it from the WiFi, but I receive the Certificate Error (from mediarouter.home).
If I access it from the external network (4G), I don't have any problem.
How did you solve it?
Beste antwoord door Brian
As for an answer to your question, sometimes issues arise because the Huawei modem does not support NAT loopback. We've contacted our supplier but we're currently not able to support/activate this feature. You can find more information here and herefor possible workarounds. My apologies for the inconvenience!