Edit linksys router settings
In Figure 5-2, the router is configured to allow port forwarding for TCP port 80 to the internal web server (HostA) located at IP address 10.1.1.100.The process works like this: The router receives a packet destined to its external IP address using TCP port 80. The router forwards the response to the internal web server (HostA), keeping the source IP address of the original external host