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Chapter 19 DHCP Server
NBG4615 User’s Guide
170
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.
Table 67 Network > DHCP Server > Advanced (continued)
LABEL DESCRIPTION