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Click Save after making changes. The defined DNAT configuration displays at the bottom of the screen.
Delete or edit settings 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.
For this example, 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 and click Add.
Name:
Enter a name for the LAN device.
IP Address and Subnet Address:
Example:
Name = MeterIP
IP Address = 192.168.2.100
Subnet Address = 255.255.255.255. The subnet mask in the network configuration is not defined using
x.x.x.x notation. It uses 'bit' notation. So 255.255.255.255 = 32.
2.
On the
Network & Services > Service Configuration
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 or udp
S-Port / Client:
D-Port / Server:
3.
On the Packet Filters > DNAT Configuration screen, define the DNAT rule.
Allow Access:
The original target network/host is the one previously defined in the Network Configuration section.
Example: Any
External Service:
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:
Pre DNAT Service:
Service Configuration section. Example: MeterPort
Post DNAT IP:
defined as the Post DNAT destination. Example: MeterIP
Post DNAT Service:
Internal Source –
to change the address, select NOCHANGE. Example: NOCHANGE
4.
Click Save to save the configuration.
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Enter the IP address and subnet address of the device.
Enter the source port for this service. Example: 1:65535
Enter the destination port for this service. Example: 7700
Select the original target network/host of the IP packets that you now want rerouted.
Select the External Service that you want allowed. The service must be defined in
Select the Internal Service to be the destination.
Select the service for the Pre-DNAT destination. This service was just defined in the
Select the destination to which the IP packets are to be diverted. Only one host can be
Select the service for the Post DNAT configuration. Example: MeterPort
Select the source address for packets that are going to be sent. If you do not want
Chapter 3 – Using the Web Management Software
screen, define a service name and click Add. For this
Multi-Tech Systems, Inc. MultiModem rCell User Guide
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