ZyXEL Communications wireless n gigabit netusb router User Manual

Chapter 19 DHCP Server

NBG4615 User’s Guide

First DNS Server

Second DNS Server 

Select From ISP if your ISP dynamically assigns DNS server information (and 
the NBG4615'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 NBG4615 act as a DNS proxy. The NBG4615's 
LAN IP address displays in the field to the right (read-only). The NBG4615 tells 
the DHCP clients on the LAN that the NBG4615 itself is the DNS server. When a 
computer on the LAN sends a DNS query to the NBG4615, the NBG4615 
forwards the query to the NBG4615'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 NBG4615.

Cancel

Click Cancel to begin configuring this screen afresh.

Network > DHCP Server > Advanced (continued)