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Source IP Address:
This specifies an IP address that is allowed to access the modem or a wildcard IP address of 0.0.0.0
that allows all IP address to access the modem.
Incoming Port:
This sets the external port number for incoming requests.
Destination IP Address:
This sets the Local Area Network Address of the device connected to the modems Ethernet Jack.
Inbound requests will be forwarded to this IP address.
Destination Port:
This sets the Local Area Network port number used when forwarding to the destination IP address.
As an example, if it were required that all incoming addresses using port 81 and 8081 be routed to
IP address 192.168.1.222 on port 80 then the following information would be entered.
First, set the mapping number to 1, set the protocol to all, set the source IP address to 0.0.0.0 and
the incoming port to 81, set the destination IP address to 192.168.1.222 and the destination port to
80, then click the SAVE button. This will set the first entry in the table as Item 1.
To route port 8081 as well, enter a mapping number of 2, set the protocol to all, set the source IP
address to 0.0.0.0 and the incoming port to 8081, then set the destination IP address and port to
the same values as before and click the SAVE button. A second entry will be created as item 2,
shown in Figure 8.2 below.
Figure 8.2: Port Forwarding Mapping Table example 1
As a second example, add the requirement to forward information from IP address 192.168.2.100,
port 8083 to IP address 192.168.1.223, port 8083 using the tcp protocol.
Enter a mapping number of 3, set the protocol to tcp, set the source IP address to 192.168.2.100
and the incoming port to 8083, then set the destination IP address to 192.168.1.223 and the
destination port to 8083, then click the SAVE button. A third entry will be created as item 3, shown
in Figure 8.3 below.
Figure 8.3: Forwarding Mapping Table example 2
