Network Setup Dnat, Add Dnat Definition, Wan Ip

Chapter 5 – Configuration Using Web Management Software

Network Setup > DNAT

The DNAT (Destination Network Address Translation) process allows placing servers within the protected network and making available for a certain service to the outside world. Normally, the RouteFinder has a network server running in the LAN providing a network service with an address in the specified range, and wants this service accessible to the outside world. The DNAT process running on the RouteFinder translates the destination address of incoming packets to the address of the real network server on the LAN. The packets then get forwarded.

Important Notes:

•A DNAT rule with the Pre-DNAT Network as ANY, a Service as ANY, and a Destination Service as ANY cannot be added. This will cause all the packets to be routed to the system with Post DNAT network and services in the RouteFinder will not function properly.

•As the address conversion takes place BEFORE the filtering by the packet filter rules, you must set the appropriate rules in the Packet Filter > Packet Filter Rules menu to let the already-translated packets pass. You can find more about setting packet filter rules earlier in this chapter.

Add DNAT Definition

Allow Access From

Select the source network/host to which the DNAT rule will apply.

WAN IP

Select the original target host or network of the IP packets that are to be re-routed. This target host or network SHOULD BE reachable from the Internet. The network/host must have been defined in the Networks section of this software. Example: network1

External Service

Select the Pre DNAT service. The service must have been defined in the Services section of this software. Example: FTP, TELNET

LAN Dst IP

Select the designation to which IP packets are to be diverted. Only one host can be defined as the Post DNAT destination. Normally, this IP address is the service running on the private LAN segment. Example: host1

Internal Service

Select the service for the Post DNAT service. Example: FTP

Add

Click the Add button to save your choices.

Edit, Delete

After saving the settings, a table is created and displayed at the bottom of the screen. You can edit or delete entries by highlighting the desired entries and clicking either the Edit or Delete button listed under Command.

Multi-Tech Systems, Inc. RouteFinder SOHO RF820/RF820-AP & RF830/RF830-AP User Guide (S000399E)