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Port Security Overview


Ethernet LANs are vulnerable to attacks such as address spoofing (forging) and Layer 2 denial of service (DoS) attacks on network devices. Port security features help protect the access ports on your services gateway against the losses of information and productivity that can result from such attacks.

Junos OS on SRX Series devices provides features to help secure ports on a switching port on the services gateway. The ports can be categorized as either trusted or untrusted. You apply policies appropriate to those categories to protect against various types of attacks.

The MAC limit port security feature can be turned on to obtain the most robust port security level. Basic port security features are enabled in the services gateway's default configuration. You can configure additional features with minimal configuration steps.