D-Link DSA-3100 Owner's Manual page 39

Using the Configuration Utility (continued)
If you have multiple IP
addresses available to
assign to the DSA-3100's
WAN interface, you could
define up to 10 pairs of
Ethernet side (Private IP)
and WAN side (Public IP)
addresses. The WAN
interface will bind the extra
public IP addresses
automatically.
To allow users access to a
few websites before they log
in, enter the IP addresses of
those sites in the Free
Surfing Area list. Up to 10
sites can be defined. For
example, a website that
provides introduction and
guidance for local facilities
and routes or sites with
content suitable or
appropriate for public
viewing could be listed in the
Free Surfing Area. Guest
users of the network cannot
access other parts of the
network but could still
connect to these sites.
These sites provide a free experience but can also indicate other areas of the
Internet that can be accessed for an additional fee.
Advanced > DMZ
Advanced > Free Surfing Area
39