Axis Network video Manual page 79

NETWORk TECHNOLOGIES - CHAPTER 9 79
Port forwarding is traditionally done by first configuring the router. Different routers have
different ways of doing port forwarding and there are web sites such as www.portfoward.com
that offer step-by-step instruction for different routers. Usually port forwarding involves bring-
ing up the router's interface using an Internet browser, and entering the public (external) IP
address of the router and a unique port number that is then mapped to the internal IP address
of the specific network video product and its port number for the application.
To make the task of port forwarding easier, Axis offers the NAT traversal feature in many of its
network video products. NAT traversal will automatically attempt to configure port mapping in a
NAT router on the network using UPnP™. In the network video product interface, users can manu-
ally enter the IP address of the NAT router. If a router is not manually specified, then the network
video product will automatically search for NAT routers on the network and select the default
router. In addition, the service will automatically select an HTTP port if none is manually entered.
Figure 9.2b Axis network video products enable port forwarding to be set using NAT traversal.