You install Windows Server 2012 R2 on a standalone server named Server1. You configure
Server1 as a VPN server.
You need to ensure that client computers can establish PPTP connections to Server1.
Which two firewall rules should you create? (Each correct answer presents part of the
solution. Choose two.)

A.
An outbound rule for TCP port 1701

B.
An inbound rule for TCP port 1723

C.
An inbound rule for protocol 47

D.
An outbound rule for protocol 47

E.
An outbound rule for TCP port 1723

Explanation:
To enable VPN tunnels between individual host computers or entire networks that have a
firewall between them, you must open the following ports:
To allow PPTP tunnel maintenance traffic, open TCP 1723.
To allow PPTP tunneled data to pass through router, open Protocol ID 47.
If you use a personal firewall or a broadband router, or if there are routers or firewalls
between the VPN client and the VPN server, the following ports and protocol must be
enabled for PPTP on all firewalls and routers that are between the VPN client and the VPN
server:
References:
http://www.windowsitpro.com/article/pptp/which-ports-do-you-need-to-open-on-a-firewall-toallow-pptp-andl2tp-over-ipsec-vpn-tunnels–46811
http://support.microsoft.com/kb/314076/en-us