I feel this is somewhat outdated advice. Thanks to restrictive firewalls, much incoming and outgoing traffic to services is tunneled over HTTP/HTTPS and uses t

I feel this is somewhat outdated advice. Thanks to restrictive firewalls, much incoming and outgoing traffic to services is tunneled over HTTP/HTTPS and uses the standard 80/443 ports. There are also legitimate reasons to have 80/443 open such as access to security systems, your home router, etc. They can't block incoming 80 or 443 without breaking a lot of things, so they won't. It's not the 90's anymore. You really have to worry more about hitting your 1TB Comcast bandwidth cap.