ZyXEL Communications 2 Plus User Manual

Chapter 8 WAN Screens

ZyWALL 2 Plus User’s Guide

Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables secure transfer of 
data from a remote client to a private server, creating a Virtual Private Network (VPN) using 
TCP/IP-based networks.
PPTP supports on-demand, multi-protocol and virtual private networking over public 
networks, such as the Internet. The screen shown next is for PPTP encapsulation.

Multicast Version Choose None (default), IGMP-V1 or IGMP-V2. IGMP (Internet Group Multicast 

Protocol) is a session-layer protocol used to establish membership in a Multicast 

group – it is not used to carry user data. IGMP version 2 (RFC 2236) is an 

improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If 

you would like to read more detailed information about interoperability between 

IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236.

Spoof WAN MAC 

Address

You can use the factory assigned default MAC Address or cloning the MAC 

address from a computer on your LAN. 
Otherwise, select the check box next to Spoof WAN MAC Address and enter the 

IP address of the computer on the LAN whose MAC you are cloning. Once it is 

successfully configured, the address will be copied to the rom file (ZyNOS 

configuration file). It will not change unless you change the setting or upload a 

different ROM file. 

Clone the 

computer’s MAC 

address – IP 

Address

Enter the IP address of the computer on the LAN whose MAC you are cloning.
It is recommended that you clone the MAC address prior to hooking up the WAN 

port.

Apply

Click Apply to save your changes back to the ZyWALL.

Reset

Click Reset to begin configuring this screen afresh.

Table 33   NETWORK > WAN > WAN (PPPoE Encapsulation) (continued)