ZyWALL 5/35/70 Series User’s Guide

 

Table 41 WAN: PPTP Encapsulation

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

Enable NAT

Network Address Translation (NAT) allows the translation of an Internet protocol

 

(Network Address

address used within one network (for example a private IP address used in a local

 

Translation)

network) to a different IP address known within another network (for example a

 

 

public IP address used on the Internet).

 

 

Select this checkbox to enable NAT.

 

 

For more information about NAT see Chapter 22 on page 370.

 

 

 

 

RIP Direction

RIP (Routing Information Protocol) allows a router to exchange routing information

 

 

with other routers. The RIP Direction field controls the sending and receiving of

 

 

RIP packets.

 

 

Choose Both, None, In Only or Out Only.

 

 

When set to Both or Out Only, the ZyWALL will broadcast its routing table

 

 

periodically.

 

 

When set to Both or In Only, the ZyWALL will incorporate RIP information that it

 

 

receives.

 

 

When set to None, the ZyWALL will not send any RIP packets and will ignore any

 

 

RIP packets received.

 

 

By default, RIP Direction is set to Both.

 

 

 

 

RIP Version

The RIP Version field controls the format and the broadcasting method of the RIP

 

 

packets that the ZyWALL sends (it recognizes both formats when receiving).

 

 

Choose RIP-1,RIP-2B or RIP-2M.

 

 

RIP-1is universally supported; but RIP-2carries more information. RIP-1 is

 

 

probably adequate for most networks, unless you have an unusual network

 

 

topology. Both RIP-2Band RIP-2Msends the routing data in RIP-2 format; the

 

 

difference being that RIP-2B uses subnet broadcasting while RIP-2M uses

 

 

multicasting. Multicasting can reduce the load on non-router machines since they

 

 

generally do not listen to the RIP multicast address and so will not receive the RIP

 

 

packets. However, if one router uses multicasting, then all routers on your network

 

 

must use multicasting, also. By default, the RIP Version field is set to RIP-1.

 

Enable Multicast

Select this check box to turn on IGMP (Internet Group Multicast Protocol). IGMP is

 

 

a network-layer protocol used to establish membership in a Multicast group - it is

 

 

not used to carry user data.

 

Multicast Version

Choose None (default), IGMP-V1or 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

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

 

Address

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

Enter the IP address of the computer on the LAN whose MAC you are cloning.

 

computer’s MAC

It is recommended that you clone the MAC address prior to hooking up the WAN

 

address – IP

 

port.

 

Address

 

 

 

 

 

 

Apply

Click Apply to save your changes back to the ZyWALL.

 

 

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

 

Chapter 7 WAN Screens

148