User`s manual

P-660R-F1 Support Notes
27
All contents copyright © 2011 ZyXEL Communications Corporation.
DNS (Domain Name Server)
53
www-http (Web)
80
POP3
110
HTTPs
443
PPTP
1723
Configure a PPTP server behind SUA
Introduction
PPTP is a tunneling protocol defined by the PPTP forum that allows PPP packets
to be encapsulated within Internet Protocol (IP) packets and forwarded over any
IP network, including the Internet itself.
In order to run the Windows 9x PPTP client, you must be able to establish an IP
connection with a tunnel server such as the Windows NT Server 4.0 Remote
Access Server.
Windows Dial-Up Networking uses the Internet standard Point-to-Point (PPP) to
provide a secure, optimized multiple-protocol network connection over dial-up
telephone lines. All data sent over this connection can be encrypted and
compressed, and multiple network level protocols (TCP/IP, NetBEUI and
IPX) can be run correctly. Windows NT Domain Login level security is preserved
even across the Internet.
Window98 PPTP Client / Internet / NT RAS Server Protocol Stack