Cybersecurity can be undermined before a firewall gets involved. A loose patch...

https://holdensimpressivethoughts.lumenforgex.com/posts/is-cat6a-worth-it-for-10gb-s-over-100-metres

Cybersecurity can be undermined before a firewall gets involved. A loose patch lead, an unmanaged switch or a forgotten default password can open the door to outages and unauthorised access