ZyWALL 5/35/70 Series User’s Guide

 

Table 47 DMZ: IP Alias (continued)

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

IP Subnet Mask

Your ZyWALL will automatically calculate the subnet mask based on the IP

 

 

address that you assign. Unless you are implementing subnetting, use the subnet

 

 

mask computed by the ZyWALL.

 

RIP Direction

RIP (Routing Information Protocol, RFC1058 and RFC 1389) allows a router to

 

 

exchange routing information with other routers. The RIP Direction field controls

 

 

the sending and receiving of RIP packets. Select the RIP direction from Both/In

 

 

Only/Out Only/None. When set to Both or Out Only, the ZyWALL will broadcast

 

 

its routing table periodically. When set to Both or In Only, it will incorporate the

 

 

RIP information that it receives; when set to None, it will not send any RIP packets

 

 

and will ignore any RIP packets received.

 

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). RIP-1

 

 

is universally supported but RIP-2 carries 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-2Buses subnet broadcasting while RIP-2Muses 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, RIP direction is set to Both and the Version set to

 

 

RIP-1.

 

Apply

Click Apply to save your changes back to the ZyWALL.

 

 

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

 

8.5 DMZ Public IP Address Example

The following figure shows a simple network setup with public IP addresses on the WAN and DMZ and private IP addresses on the LAN. Lower case letters represent public IP addresses (like a.b.c.d for example). The LAN port and connected computers (A through C) use private IP addresses that are in one subnet. The DMZ port and connected servers (D through F) use public IP addresses that are in another subnet. The public IP addresses of the DMZ and WAN ports are in separate subnets.

Chapter 8 DMZ Screens

168