Name: Hitron CGNV4
Brand: Hitron
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Hitron CGNV4 User’s Guide

3.1.2 Port Forwarding

Port forwarding allows a computer on your LAN to receive specific communications

from the WAN. Typically, this is used to allow certain applications (such as gaming)

through the firewall, for a specific computer on the LAN. Port forwarding is also

commonly used for running a public HTTP server from a private network.

You can set up a port forwarding rule for each application for which you want to open

ports in the firewall. When the CGNV4 receives incoming traffic from the WAN with a

destination port that matches a port forwarding rule, it forwards the traffic to the LAN

IP address and port number specified in the port forwarding rule.

NOTE: For information on the ports you need to open for a particular application,

consult that application’s documentation.

3.1.3 Port Triggering

Port triggering is a means of automating port forwarding. The CGNV4 scans outgoing

traffic (from the LAN to the WAN) to see if any of the traffic’s destination ports match

those specified in the port triggering rules you configure. If any of the ports match, the

CGNV4 automatically opens the incoming ports specified in the rule, in anticipation of

incoming traffic.

3.1.4 DMZ

In networking, the De-Militarized Zone (DMZ) is a part of your LAN that has been

isolated from the rest of the LAN, and opened up to the WAN. The term comes from

the military designation for a piece of territory, usually located between two opposing

forces, that is isolated from both and occupied by neither.

3.1.5 Routing Mode

When your CGNV4 is in routing mode, it acts as a gateway for computers on the LAN

to access the Internet. The service provider assigns an IP address to the CGNV4 on

the WAN, and all traffic for LAN computers is sent to that IP address. The CGNV4

assigns private IP addresses to LAN computers (when DHCP is active), and

transmits the relevant traffic to each private IP address.

NOTE: When DHCP is not active on the CGNV4 in routing mode, each computer on

the LAN must be assigned an IP address in the CGNV4’s subnet manually.

Hitron CGNV4 User Manual

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