I have Infinity FTTP (so fibre directly into the house, not cab, but same backhaul).
I can connect to all manner of VPN’s in work and clients, never had an issue. This is sometimes multiple machines.
Also I have a VPN router inside my network, so I can stream content from my NAS when I’m away – again works fine, so all inbound and outbound seems to work.
I’ve never found a blocked port.
The Homehub on the other hand is very consumer so you have to open ports I believe – chuck it in the bin and get something better, the time saved on not having to reboot the router will offset any cost of a decent router.