ZyXEL Communications ZYWALL 2 PLUS User Manual page 163

Table 39 NETWORK > DMZ (continued)
LABEL
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
Allow between
DMZ and WLAN
Apply
Reset
ZyWALL 2 Plus User's Guide
DESCRIPTION
Select IGMP V-1 or IGMP V-2 or None. IGMP (Internet Group Multicast 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 interoperability 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 the WAN and
from the WAN to the DMZ.
Clear this check box to block all NetBIOS packets going from the DMZ to the
WAN and from the WAN to the DMZ.
Select this check box to forward NetBIOS packets from the WLAN to the DMZ
and from the DMZ to the WLAN. If your firewall is enabled with the default policy
set to block DMZ to WLAN traffic and WLAN to DMZ traffic, you also need to
configure DMZ to WLAN and WLAN to DMZ firewall rules that forward NetBIOS
traffic.
Clear this check box to block all NetBIOS packets going from the WLAN to the
DMZ and from the DMZ to the WLAN.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
Chapter 9 DMZ Screens
163