Comtrend Corporation AR-5312u, User Manual

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Field/Header Description
Use Interface Select a WAN interface from the drop-down box.
Select a Service
Or
Custom Service
User should select the service from the list.
Or
User can enter the name of their choice.
Server IP Address Enter the IP address for the server.
Enable NAT
Loopback Allows local machines to access virtual server via WAN IP
Address
External Port Start Enter the starting external port number (when you select
Custom Server). When a service is selected, the port ranges
are automatically configured.
External Port End Enter the ending external port number (when you select
Custom Server). When a service is selected, the port ranges
are automatically configured.
Protocol TCP, TCP/UDP, or UDP.
Internal Port Start Enter the internal port starting number (when you select
Custom Server). When a service is selected the port ranges
are automatically configured
Internal Port End Enter the internal port ending number (when you select
Custom Server). When a service is selected, the port ranges
are automatically configured.
5.2.2 Port Triggering
Some applications require that specific ports in the firewall be opened for access by
the remote parties. Port Triggers dynamically 'Open Ports' in the firewall when an
application on the LAN initiates a TCP/UDP connection to a remote party using the
'Triggering Ports'. The Router allows the remote party from the WAN side to
establish new connections back to the application on the LAN side using the 'Open
Ports'. A maximum 32 entries can be configured.
To add a Trigger Port, click
Add . The following will be displayed.