Chapter 3 – Using the Web Management Software
Packet Filters > DNAT Configuration
Destination Network Address Translation (DNAT) is a process that allows the placing of servers within the protected network and making them available for a certain service to the outside world. The DNAT process running of the wireless modem/router translates the destination address of incoming packets to the address of the real network server on the LAN. The packets are then forwarded.
You can Delete or Edit a DNAT rule after it has been defined and added by using the table at the bottom of the screen.
Important Note: When adding rules, at least one host must be defined in the Network Configuration section.
DNAT Configuration
Allow Access: Select a network or host to which IP packets will be allowed and
External Service: Select the External Service that you want allowed. The service must be defined in the Service Configuration section.
LAN IP:Select the LAN IP to which the packets are to be diverted. Only one host can be defined as the destination.
Internal Service: Select the Internal Service to be the destination.
Internal Source: Select the source address for packets that going to be sent. If you do not want to change the address, select NOCHANGE.
Save Button: Click the Save button. The defined DNAT configuration is added and will display at the bottom of the screen. Entries can be deleted or edited by clicking the Edit or the Delete buttons.
Packet Filters > DNAT Example
Set Up DNAT and Port Forwarding to an Internal Device
Note: The internal device can be camera, meter, security device, etc.
Situation: Assume the device is on a LAN with an IP address of 192.168.2.100 and the port to access the device is port 7700.
1.On the Network & Services > Network Configuration screen, set up the following parameters: Name – Enter a name for the LAN device.
IP Address and Subnet Address – Enter the IP address and subnet address of the device. Example: Name = MeterIP
IP Address = 192.168.2.100 Subnet Address = 255.255.255.255
Add – Click the Add button to save this configuration.
2.On the Network & Services > Service Configuration screen, define a service name. For this example, the service will be a meter.
Name – Enter a name for the service (use a name that will identify the service for you).
Example: MeterPort
Protocol – Select a protocol.
Example: tcp/udp
Example: 1:65535
Example: 7700
Add – Click the Add button to save this configuration.
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