Network Access Control and Port Security
Controlling physical access to your network
Physical security of your network ports
Locked cabinets
Disable unused ports
Protect cable runs
Simple method: Port Security or MAC Filtering
Advanced method: NAC / NAP / 802.1x / port based authentication
Supplicant (you)
Authenticator (the network access device)
Authentication server (RADIUS server)
EAPoL traffic allowed
Additional checks can be performed
Health check / posture validation
Is it our device?
OS updates
AV updates and scans
Group membership
Location (network type, GeoIP, GPS)
Time of day
Remediation options:
Deny access
Restricted VLAN (quarantine)
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