ZyXEL Communications NBG420N - Manual (Page 135)

Chapter 10 DHCP
NBG420N User’s Guide
135
10.4 Client List Screen
The DHCP table shows current DHCP client information (including IP Address, Host Name
and MAC Address) of network clients using the NBG420N’s DHCP servers.
Configure this screen to always assign an IP address to a MAC address (and host name). Click
Network > DHCP Server > Client List.
"
You can also view a read-only client list by clicking the DHCP Table (Details...)
hyperlink in the Status screen.
The following screen displays.
DNS Server
DNS Servers
Assigned by DHCP
Server
The NBG420N passes a DNS (Domain Name System) server IP address (in the
order you specify here) to the DHCP clients. The NBG420N only passes this
information to the LAN DHCP clients when you select the Enable DHCP Server
check box. When you clear the Enable DHCP Server check box, DHCP service
is disabled and you must have another DHCP sever on your LAN, or else the
computers must have their DNS server addresses manually configured.
First DNS Server
Second DNS
Server
Third DNS Server
Select From ISP if your ISP dynamically assigns DNS server information (and
the NBG420N's WAN IP address). The field to the right displays the (read-only)
DNS server IP address that the ISP assigns.
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 NBG420N act as a DNS proxy. The NBG420N's
LAN IP address displays in the field to the right (read-only). The NBG420N tells
the DHCP clients on the LAN that the NBG420N itself is the DNS server. When a
computer on the LAN sends a DNS query to the NBG420N, the NBG420N
forwards the query to the NBG420N's system DNS server (configured in the
WAN > Internet Connection 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.
Apply Click Apply to save your changes back to the NBG420N.
Reset Click Reset to begin configuring this screen afresh.
Table 51 Network > DHCP > Advanced
LABEL DESCRIPTION