Planet Technology Internet Telephony PBX System IPX-300 Series - Manual (Page 45)

LAN network. Depending on the requested service (TCP/UDP port number), the device redirects the
external service request to the appropriate server within the LAN network. You will only need to input
the LAN IP address of the computer running the service and enable it.
A Virtual Server is defined as a service port, and all requests to this port will be redirected to the
computer specified by the server IP.
Figure 4-27. Virtual server mapping settings
Enable
Enable/Disable the virtual server mapping, default setting is Disable.
WAN Port
The port number on the WAN side that will be used to access the
virtual service. Enter the WAN Port number, e.g. enter 80 to
represent the Web (http server), or enter 25 to represent SMTP
(email server). Note: You can specify maximum 32 WAN Ports.
Protocol
The protocol used for the virtual service. Select a protocol type is
TCP or UDP.
LAN IP
The server computer in the LAN network that will be providing the
virtual services. Enter the IP address of LAN.
LAN Port
The port number of the service used by the Private IP computer.
Enter the LAN port number.
Action Insert a new WAN port or update a specified WAN port.
Table 4-11. Virtual server mapping description
¾ Port Trigger
Some applications require multiple connections, such as Internet gaming, video conferencing, Internet
telephony and others. These applications have difficulties working through NAT (Network Address
Translation). If you need to run applications that require multiple connections, specify the port normally
associated with an application in the "Trigger Port" field, select the protocol type as TCP (Transmission
Control Protocol) or UDP (User DIP-PBXgram Protocol), then enter the public ports associated with the
trigger port to open them for inbound traffic.
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