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HITRON CGNV2 USER’S GUIDE
FIREWALL
Deny the devices on the list access to the CGNV2 and the network (in which
case all other devices can access the network)
or
Allow the devices on the list to access the network (in which case no other
devices can access the network)
4.1.5 IP FILTERING
IP filtering allows you to prevent computers on the LAN from sending certain types of
data to the WAN. You can use this to prevent unwanted outgoing communications.
Specify the IP address of the computer on the LAN from which you want to prevent
communications, and specify the port range of the communications you want to
prevent. The CGNV2 discards outgoing data packets that match the criteria you
specified.
4.1.6 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 CGNV2 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.
NOTE: This feature is not available when the DS-lite function is enabled.
4.1.7 PORT TRIGGERING
Port triggering is a means of automating port forwarding. The CGNV2 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
CGNV2 automatically opens the incoming ports specified in the rule, in anticipation of
incoming traffic.
NOTE: This feature is not available when the DS-lite function is enabled.
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