As follow Up to home splunking and ports

I had an earlier question about the ability to learn Splunk at home. I am using a FiOS router that I just want to search the data passing through to see how Splunk access the data from the Internet. I tried to add Input Data Port 80 which did not work. Does anyone have a suggestion on ways to search, index and analyze the traffic coming in from my FiOS router??? I don't know what port to use for InputData on Splunk