Lan Static Dhcp - ZyXEL Communications ZYWALL P1 User Manual

Table 24 NETWORK > LAN (continued)
LABEL
First DNS Server
Second DNS
Server
Third DNS Server
Windows
Networking
(NetBIOS over
TCP/IP)
Allow between
LAN and WAN
Apply
Reset

6.9 LAN Static DHCP

This table allows you to assign an IP address on the LAN to a specific individual computer
based on its MAC address.
Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address
is assigned at the factory and consists of six pairs of hexadecimal characters, for example,
00:A0:C5:00:00:02.
To change your ZyWALL's static DHCP settings, click NETWORK > LAN > Static DHCP.
The screen appears as shown.
ZyWALL P1 User's Guide
DESCRIPTION
Select From ISP if your ISP dynamically assigns DNS server information (and the
ZyWALL's WAN IP address). Use the drop-down list box to select a DNS server IP
address that the ISP assigns in the field to the right.
Select User-Defined if you have the IP address of a DNS server. Enter the DNS
server's IP address in the field to the right. If you chose User-Defined, but leave
the IP address set to 0.0.0.0, User-Defined changes to None after you click
Apply. If you set a second choice to User-Defined, and enter the same IP
address, the second User-Defined changes to None after you click Apply.
Select DNS Relay to have the ZyWALL act as a DNS proxy. The ZyWALL's LAN
IP address displays in the field to the right (read-only). The ZyWALL tells the
DHCP client on the LAN that the ZyWALL itself is the DNS server. When a
computer on the LAN sends a DNS query to the ZyWALL, the ZyWALL forwards
the query to the ZyWALL's system DNS server (configured in the DNS System
screen) and relays the response back to the computer. You can only select DNS
Relay for one of the three servers; if you select DNS Relay for a second or third
DNS server, that choice changes to None after you click Apply.
Select None if you do not want to configure DNS servers. If you do not configure a
DNS server, you must know the IP address of a computer in order to access it.
NetBIOS (Network Basic Input/Output System) are TCP or UDP packets that
enable a computer to connect to and communicate with a LAN. For some dial-up
services such as PPPoE or PPTP, NetBIOS packets cause unwanted calls.
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.
Select this check box to forward NetBIOS packets from the LAN to the WAN port
and from the WAN port to the LAN. If your firewall is enabled with the default policy
set to block WAN to LAN traffic, you also need to enable the default WAN to LAN
firewall rule that forwards NetBIOS traffic.
Clear this check box to block all NetBIOS packets going from the LAN port to the
WAN port and from the WAN port to the LAN port.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
Chapter 6 LAN Screens
113