I know this is an old thread , so will try to tread carefully
The Hitron CGNV4 is used by several ISP globally , this thread was regarding a Virgin business Hitron CGNV4 Router Functionality
My understanding is that the Modem Only mode was introduced sometime after the Hitron was initially released by Virgin . It is available now however
It is also confirmed now by Virgin business ( Verbally ) that they Cannot currrently support or recommend Public Static IP addressing for the vast majority of consumers . It is a well known problem that these routers struggle with Static IP addressing .
We have the 200Mb line for Virgin Business, it was never stable until we switched to Static to dynamic , now the internet is fast and stable . However I have tried every configuration possible on the Hitron in order to get ports open , unfortunately the router just will not open ports .
I wondered if enabling Modem only mode and using a secondary router to forward ports is the only answer ?