On November 22, 2011 at 23:28, drewski300 said...
Isn't the point of using port 80? Because 80 is the standard port used viewing websites and you don't need to port forward anything?
Yes, but that depends on the initiation of a 'session.'
If your browser fires up inside the LAN and requests a website on port 80, you initiated a session from within the LAN, the router will allow traffic on port 80 between that destination and your computer.
If a WAN side request to initiate a session is on port 80, and as Anthony said some ISP's block port 80, then the communication will fail.
So if port 80 is 'blocked,' a computer on the internet cannot start a session with a device within your LAN using port 80, but a computer inside your LAN can start a session with another device on the internet on port 80 and it will work.
