I am totally a network novice.
My plan is to do some simple low-bandwidth testing of a web server I have configured using Tomcat standalone technology. It runs on port 5050 and works as expected in "localhost" mode. My dlink dsl504T modem/router offers "port forwarding" to allow web users to access an IP address within the local network. The router has a fixed IP address and the router software allows one to divert designated port traffic to an local network IP address. The following entries were tried:
private IP: 10.1.1.3 (the computer running tomcat)
protocol: TCP (also offered UDP and BOTH)
port start: 80
port end: 80
port map: 5050
When an external web web user entered the fixed IP address of my router (preceded by "http://" prefix) there was no connection.
I am assuming that an http request coming to the router is received at port 80 by convention. I am assuming that router port 80 traffic is simply diverted to the local IP address and to port 5050 where tomcat is listening.
I have obviously got something wrong. Thanks if you can help.