Chapter 19 DHCP Server

Table 67 Network > DHCP Server > Advanced (continued)

LABEL

DESCRIPTION

First DNS Server

Select From ISP if your ISP dynamically assigns DNS server information (and

Second DNS Server

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-Definedif 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-Definedchanges to None after

 

you click Apply. If you set a second choice to User-Defined, and enter the

 

same IP address, the second User-Definedchanges 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.

 

 

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NBG4615 User’s Guide