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Win2008 VPN uses PPTP, which ports should be opened?
If it is a windows VPN server: PPTP 1723.

L2TP 170 1

Application protocol protocol port

Traditional radius

User Datagram Protocol (user datagram protocol)

1645

Traditional radius

User Datagram Protocol (user datagram protocol)

1646

RADIUS accounting

User Datagram Protocol (user datagram protocol)

18 13

RADIUS authentication

User Datagram Protocol (user datagram protocol)

18 12