Справочник Пользователя для ZyXEL Communications Corporation NBG4104

Chapter 12 DHCP Server

NBG4104 User’s Guide

First DNS Server

Second DNS Server 

Select From ISP if your ISP dynamically assigns DNS server information (and the 
NBG4104'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 NBG4104 act as a DNS proxy. The NBG4104's LAN IP 
address displays in the field to the right (read-only). The NBG4104 tells the DHCP 
clients on the LAN that the NBG4104 itself is the DNS server. When a computer on the 
LAN sends a DNS query to the NBG4104, the NBG4104 forwards the query to the 
NBG4104'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 NBG4104.

Reset

Click Reset to begin configuring this screen afresh.

Configuration > Networking > DHCP Server > Advanced (continued)