Do you limit MAC addresses on your network switches?

Have you ever faced a scenario where an unauthorized device is discreetly connected to an open port on your network switch, potentially intercepting sensitive data or disrupting critical services? This situation isn’t just theoretical - it can lead to serious security breaches, data theft, and system downtime if you do not restrict the MAC addresses allowed to connect.

An open switch port accepts any device, allowing a malicious actor to connect and compromise internal systems.

Benefits of limiting MAC addresses on network switches

• Increased security - Restricts unauthorized hardware from accessing sensitive resources
• Stronger perimeter - Keeps dangerous devices from infiltrating your network, especially at high-risk access points like camera ports
• Data protection - Maintains the integrity and confidentiality of your data by ensuring only trusted devices connect

Particularly Vulnerable: Camera Ports

Outdoor or easily accessible camera ports are prime targets, as attackers can physically connect rogue devices to these less protected areas. By setting static or pre-approved MAC addresses on these ports, you ensure only the intended camera is allowed—keeping bad actors out.

Together with other security standards like keeping your networks separated via Virtual LANs and using Intrusion Prevention Systems, your network should always be tested and protected against malicious actors in the wild.