I'm not exactly sure the topology you are asking about, but see if this helps:
VPN server: can access the internet
Other computers on the same LAN as the VPN server: can access the internet
Computers not normally on the LAN but joining the LAN via the VPN server: cannot access the internet while on the VPN, but can access the internet while not connected to the VPN.
Does that answer your question?
I'm not sure about IP filters. The new router is a Netgear Orbi. Here are some of the settings that I suspect may have something to do with it:
- Under WAN setup (I'm including these just because they are under the WAN and the VPN clients can't access the WAN):
- Disable Port Scan and DoS Protection (not selected)
- Default DMZ Server (not selected)
- Respond to Ping on Internet Port (not selected)
- Disable IGMP Proxying (selected)
- MTU Size: 1492
- NAT Filtering: Secured
- Under Security:
- Parental Controls: disabled
- Access Control: turned off (I suspect this is the equivalent to the IP Filtering you mentioned)
- Block Sites: never
- Block Services: never