Chapter 10 Wireless LAN

 

Table 42 NETWORK > WLAN (continued)

 

LABEL

DESCRIPTION

 

Multicast

Select IGMP V-1or IGMP V-2or 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 Setup

 

 

 

 

 

DHCP

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 WLAN, or else the computers

 

 

must be manually configured.

 

 

 

 

IP Pool Starting

This field specifies the first of the contiguous addresses in the IP address pool.

 

Address

 

 

 

 

 

Pool Size

This field specifies the size, or count of the IP address pool.

 

 

 

 

DHCP Server

Type the IP address of the DHCP server to which you want the ZyWALL to relay

 

Address

DHCP requests. Use dotted decimal notation. Alternatively, click the right mouse

 

 

button to copy and/or paste the IP address.

 

 

 

 

DHCP WINS

Type the IP address of the WINS (Windows Internet Naming Service) server that

 

Server 1, 2

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.

 

 

 

 

Windows

NetBIOS (Network Basic Input/Output System) are TCP or UDP packets that

 

Networking

enable a computer to connect to and communicate with a LAN. For some dial-up

 

(NetBIOS over

services such as PPPoE or PPTP, NetBIOS packets cause unwanted calls.

 

TCP/IP)

However it may sometimes be necessary to allow NetBIOS packets to pass

 

 

through to the WAN in order to find a computer on the WAN.

 

 

 

 

Allow between

Select this check box to forward NetBIOS packets from the WLAN to the LAN and

 

WLAN and LAN

from the LAN to the WLAN.

 

 

Clear this check box to block all NetBIOS packets going from the LAN to the WLAN

 

 

and from the WLAN to the LAN.

 

 

 

 

Allow between

Select this check box to forward NetBIOS packets from the WLAN to the WAN and

 

WLAN and WAN

from the WAN to the WLAN.

 

 

Clear this check box to block all NetBIOS packets going from the WLAN to the

 

 

WAN and from the WAN to the WLAN.

 

 

 

 

Allow between

Select this check box to forward NetBIOS packets from the WLAN to the DMZ and

 

WLAN and DMZ

from the DMZ to the WLAN. If your firewall is enabled with the default policy set to

 

 

block WLAN to DMZ traffic and DMZ to WLAN traffic, you also need to configure

 

 

WLAN to DMZ and DMZ to WLAN 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.

 

 

 

 

Apply

Click Apply to save your changes back to the ZyWALL.

 

 

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

 

 

183

ZyWALL 2 Plus User’s Guide