To configure a PPTP VPN what port and protocol are required for a successful session?

To configure a PPTP VPN, you need to ensure that TCP port 1723 is open for communication. Additionally, the GRE protocol (IP protocol 47) must also be allowed through any firewalls, as it is required for the actual data transfer within the VPN. Proper configuration of both the port and protocol is essential for establishing a successful PPTP VPN session.