Cybersecurity starts before the firewall, with the cables, ports and switches...

https://www.play-bookmarks.win/cybersecurity-can-fall-apart-before-traffic-reaches-a-firewall-this-article

Cybersecurity starts before the firewall, with the cables, ports and switches carrying every connection. A bad patch lead can make VPN handshakes fail, while default switch credentials can give an intruder a path across the office