Case Project 11-1: VPN Filtering Rules You work for a network consulting firm. Your client wants to implement a VPN system that supports PPTP-, SSTP-, and L2TP-based VPNs. The system will be used primarily for remote client access. You need to prepare a report for the client that explains the implications of providing this functionality in terms of firewall configuration. Your report must address the protocols and ports that need to be considered as the firewall policy is created. Prepare a one- to two-page report that addresses these issues.