Chapter 3 – Using the Web Management Software
36
Multi-Tech Systems, Inc. MultiModem rCell User Guide
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 on the 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.
I
mportant 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 re-routed. The network/host
must be pre-defined in the Network Configuration section.
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 are 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. 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.
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 or udp
S-Port / Client –
Enter the source port for this service.
Example:
1:65535
D-Port / Server –
Enter the destination port for this service.
Example:
7700
Add –
Click the
Add
button to save this configuration.
Summary of Contents for MTCBA-EV1-EN3-N3
Page 1: ...MultiModem rCell Intelligent Wireless Router User Guide ...
Page 18: ......
