UNIX for Dummies Questions & Answers

I am using ubuntu 12.04.03. I have some basic experience with webpy and I had it working for my LAN just by following the tutorial. The framework needs to be able to be used from outside the local network. I have difficulty seeing how to make the framework accessible from outside the lan. I tried opening a specific port (with "# iptables -A INPUT -p tcp -d 0/0 -s 0/0 --dport 8081 -j ACCEPT" then I check: "# netstat -ln | grep 8081 and I get: tcp 0 0 0.0.0.0:8081 0.0.0.0:* LISTEN" ) and use "python web_py_test.py MY_IP:8081" without success.

If I understand it at all, we can have a computer connected on a wifi with a non-static IP and there is a way to launch our webpy framework which can be accessible from the outside world. I am experimenting with the hello script:

Code:

import web

urls = (
    '/(.*)', 'hello'
)
app = web.application(urls, globals())

class hello:
    def GET(self, name):
        if not name:
            name = 'World'
        return 'Hello, ' + name + '!'

if __name__ == "__main__":
    app.run()
~

I observe that nothing is declared in the script about IPs or ports.