DELL N3000 User Manual

Configuring Port and System Security

This chapter describes how to configure port-based and system security 

features, which control access to the network through the switch ports, and 

the denial of service (DoS) feature.
The topics covered in this chapter include:

• Port-based Security—IEEE 802.1X and Port MAC Locking
• Captive Portal
• Authentication Manager
• Denial of Service

Port-based security includes IEEE 802.1X authentication and port MAC 

locking.

• IEEE 802.1X provides an authentication mechanism to devices connected 

to the switch. Network access is permitted only to authorized devices 

(clients).

• Port MAC locking is used to enable security on a per-port basis. When a 

port is locked, only packets with allowable source MAC addresses can be 

forwarded. All other packets are discarded. Port-MAC locking allows a 

configurable limit to the number of source MAC addresses that can be 

learned on a port.

Port-based security can also be accomplished by using Access Control 

Lists (ACLs). For information about configuring ACLs, see "Configuring Access