ZyXEL Communications ZyWALL 2 Series Manual De Usuario

ZyWALL 2 Series User’s Guide 

25-4 

Internet Access 

Encapsulation 

Press [SPACE BAR] and then press [ENTER] to choose PPTP. The 
encapsulation method influences your choices for the IP Address field. 

Idle Timeout 

This value specifies the time, in seconds, that elapses before the 
ZyWALL automatically disconnects from the PPTP server. 

100 

(default) 

The ZyWALL supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an IETF Draft standard 
(RFC 2516) specifying how a personal computer (PC) interacts with a broadband modem (DSL, cable, 
wireless, etc.) connection. The PPPoE option is for a dial-up connection using PPPoE. 

For the service provider, PPPoE offers an access and authentication method that works with existing access 
control systems (for example Radius). PPPoE provides a login and authentication method that the existing 
Microsoft Dial-Up Networking software can activate, and therefore requires no new learning or procedures 
for Windows users. 
 
One of the benefits of PPPoE is the ability to let you access one of multiple network services, a function 
known as dynamic service selection. This enables the service provider to easily create and offer new IP 
services for individuals. 
 
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no specific 
configuration of the broadband modem at the customer site. 
 
By implementing PPPoE directly on the ZyWALL (rather than individual computers), the computers on the 
LAN do not need PPPoE software installed, since the ZyWALL does that part of the task. Furthermore, with 
NAT, all of the LANs’ computers will have access. 

If you enable PPPoE in menu 4, you will see the next screen. For more information on PPPoE, please see the 
appendix.