User's Manual Part 2

Section 3 – Configuration
D-Link DSL-2640R User Manual 35
IP Address Mapping
The Router allows the user to setup policies used for
inbound or outbound port mapping to one or multiple
global IP addresses. This may be desirable on
networks that maintain multiple global IP addresses,
multiple virtual connections or where servers on the
network must respond to connection requests from the
WAN.
To configure the mapping rules, select the select the
Multiple option under Number of IPs on the NAT
menu and click the IP Address Mapping (for
Multiple IP Service) link.
To edit a rule, use the Rule Index drop-down menu.
One you have made the desired changes, click the
SAVE button.
Rule Types:
One-to-One
Many-to-One
Many-to-Many No Overload
Use this for mapping a single global IP address to a single private internal IP address. In this
case, IP mapping is done for both inbound and outbound traffic.
This is essentially the same as SUA NAT. Multiple private internal IP addresses are mapped to
a single global IP address. Mapping occurs for outbound traffic.
Many-to-Many Overload In this case, IP mapping is done for outbound traffic from multiple
private internal IP addresses to a shared pool of multiple global IP addresses.
IP mapping is also done for outbound traffic from multiple private internal IP addresses to a
pool of global IP addresses, however each internal IP address will connect to a single global IP
address from the pool. In other words each available global IP address is allowed connection to
only one internal IP address at a time.