Cybersecurity can fail before traffic reaches a firewall. This article explains...

https://wiki-planet.win/index.php/Why_Security_Tools_Fail_When_the_Network_Foundation_Is_Shaky

Cybersecurity can fail before traffic reaches a firewall. This article explains why cabling, switch setup and physical access matter—and how a forgotten default password on a switch can let an attacker move across the network.