Wins; Dns Overview; Dns Servers - ZyXEL Communications ZYWALL P1 User Manual

224.0.0.0 is not assigned to any group and is used by IP multicast computers. The address
224.0.0.1 is used for query messages and is assigned to the permanent group of all IP hosts
(including gateways). All hosts must join the 224.0.0.1 group in order to participate in IGMP.
The address 224.0.0.2 is assigned to the multicast routers group.
The ZyWALL supports both IGMP version 1 (IGMP-v1) and IGMP version 2 (IGMP-v2). At
start up, the ZyWALL queries all directly connected networks to gather group membership.
After that, the ZyWALL periodically updates this information. IP multicasting can be enabled/
disabled on the ZyWALL LAN and/or WAN interfaces in the web configurator (LAN;
WAN). Select None to disable IP multicasting on these interfaces.

6.5 WINS

WINS (Windows Internet Naming Service) is a Windows implementation of NetBIOS Name
Server (NBNS) on Windows. It keeps track of NetBIOS computer names. It stores a mapping
table of your network's computer names and IP addresses. The table is dynamically updated
for IP addresses assigned by DHCP. This helps reduce broadcast traffic since computers can
query the server instead of broadcasting a request for a computer name's IP address. In this
way WINS is similar to DNS, although WINS does not use a hierarchy (unlike DNS). A
network can have more than one WINS server. Samba can also serve as a WINS server.

6.6 DNS Overview

DNS (Domain Name System) maps a domain name to its corresponding IP address and vice
versa. The DNS server is extremely important because without it, you must know the IP
address of a machine before you can access it.
The ZyWALL can get addresses of DNS servers in the following ways.
1 The ISP tells you the DNS server addresses, usually in the form of an information sheet,
when you sign up. If your ISP gives you DNS server addresses, manually enter them in
the DNS server fields.
2 If your ISP dynamically assigns the DNS server IP addresses (along with the ZyWALL's
WAN IP address), set the DNS server fields to get the DNS server address from the ISP.
3 You can manually enter the IP addresses of other DNS servers. These servers can be
public or private. A DNS server could even be behind a remote IPSec router (see
6.7.1 on page

6.7 DNS Servers

There are three places where you can configure DNS setup on the ZyWALL.
1 Use the MAINTENANCE > General screen to configure the ZyWALL to use a DNS
server to resolve domain names for ZyWALL system features like VPN, DDNS and the
time server.
2 Use the NETWORK > LAN screen to configure the DNS server information that the
ZyWALL sends to the DHCP client devices on the LAN.
ZyWALL P1 User's Guide
110).
Chapter 6 LAN Screens
Section
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