Cisco WRVS4400N - Small Business Wireless-N Gigabit Security Router - Configuring Port Range Triggering

Setting Up and Configuring the WRVS4400N Wireless-N Router
Configuring Firewall Settings
Cisco WRVS4400N Wireless-N Gigabit Security Router with VPN Administration Guide 102
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Configuring Port Range Triggering
The Firewall > Port Range Triggering window displays the configurations of
triggered range and forwarded range of ports that are used by applications that
request ports to be opened on demand. Port Range Triggering is an NAPT
(Network Address Port Translation) feature.
Port Range Triggering is used for special applications that can request a port to be
opened on demand. For this feature, the router watches outgoing packets for
specific port numbers. This triggers the router to allow the incoming packets
within the specified forwarding range and forward those packets to the triggering
personal computer. One of the example applications is QuickTime. It would use
port 1000 for outgoing packets and 2000 for incoming packets.
To configure port range triggering for the router, follow these steps:
STEP1 Click Firewall > Port Range Triggering.
STEP 2 Configure port range triggering settings for the router: