ZyXEL Communications ZYWALL 35 User Manual page 205

Table 49 NETWORK > DMZ (continued)
LABEL
RIP Version
Multicast
DHCP Setup
DHCP
IP Pool Starting
Address
Pool Size
DHCP Server
Address
DHCP WINS
Server 1, 2
Windows
Networking
(NetBIOS over
TCP/IP)
Allow between
DMZ and LAN
Allow between
DMZ and WAN 1
ZyWALL 5/35/70 Series User's Guide
DESCRIPTION
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-2B and RIP-2M sends 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, RIP direction is set to Both and
the Version set to RIP-1.
Select IGMP V-1 or IGMP V-2 or None. IGMP (Internet Group Management
Protocol) is a network-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 inter-operability between
IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236.
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows
individual clients (workstations) to obtain TCP/IP configuration at startup from a
server. Unless you are instructed by your ISP, leave this field set to Server.
When configured as a server, the ZyWALL provides TCP/IP configuration for the
clients. When set as a server, fill in the IP Pool Starting Address and Pool Size
fields.
Select Relay to have the ZyWALL forward DHCP requests to another DHCP
server. When set to Relay, fill in the DHCP Server Address field.
Select None to stop the ZyWALL from acting as a DHCP server. When you
select None, you must have another DHCP server on your LAN, or else the
computers must be manually configured.
This field specifies the first of the contiguous addresses in the IP address pool.
This field specifies the size, or count of the IP address pool.
Type the IP address of the DHCP server to which you want the ZyWALL to relay
DHCP requests. Use dotted decimal notation. Alternatively, click the right mouse
button to copy and/or paste the IP address.
Type the IP address of the WINS (Windows Internet Naming Service) server that
you want to send to the DHCP clients. The WINS server keeps a mapping table
of the computer names on your network and the IP addresses that they are
currently using.
Select this check box to forward NetBIOS packets from the LAN to the DMZ and
from the DMZ to the LAN. If your firewall is enabled with the default policy set to
block DMZ to LAN traffic, you also need to configure a DMZ to LAN firewall rule
that forwards NetBIOS traffic.
Clear this check box to block all NetBIOS packets going from the LAN to the
DMZ and from the DMZ to the LAN.
Select this check box to forward NetBIOS packets from the DMZ to WAN 1and
from WAN 1 to the DMZ.
Clear this check box to block all NetBIOS packets going from the DMZ to WAN 1
and from WAN 1 to the DMZ.
Chapter 9 DMZ Screens
205