Question

Often technical personnel who are not familiar with security techniques think that restricting access to ports on a router or firewall can protect a network from attack. Why is this solution?

Answer 1

This is not a good solution

Step-by-step explanation:

Your web browser uses port 80 outgoing to make web requests, so if you’re blocking incoming port 80, all you’re blocking is users of the organization from connecting to the internet. You have indeed close a vulnerable port to access from hackers, but this also can reduce the productivity of the organization.