When connecting to PPTP VPN I can only connect to web admin of other devices, i.e. switches, if I have “Use default gateway on remote network” under TCP/IP Settings checked, which settings do you need to implement to be able to not use remote gateway and still reach other devices.
How do you configure your VPN server? you should “push routes” from server to clients so that even without the default gateway option, your client will know the routes from the VPN server.
I was able to fix this issue by having the PPTP address pool use the same pool as the internal DHCP server. I had a different address pool being used for PPTP clients.