[pdonis]

> You run a network

That might be a reason for you to port scan your network.

It is not a reason for your website to port scan my network. Especially since your website running inside my browser is inside my firewall.

> and want to run a security audit

Then you use tools designed to run security audits. You don't open a huge security hole in everybody's browser just so you can use a browser to run a security audit.