SMC Networks SMC6752AL2 manual Configuring Port Security

USER AUTHENTICATION

CLI – This example enables SSH, sets the authentication parameters, and displays the current configuration. It shows that the administrator has made a connection via SHH, and then disables this connection.

Console(config)#ip		ssh server		4-49
Console(config)#ip		ssh timeout 100		4-50
Console(config)#ip		ssh authentication-retries 5		4-51
Console(config)#ip		ssh server-key size 512		4-51
Console(config)#end
Console#show ip ssh				4-55
SSH Enabled - version 2.0
Negotiation timeout: 120 secs; Authentication retries: 5
Server key size: 512 bits
Console#show ssh				4-55
Connection Version		State	Username	Encryption
0	2.0	Session-Started	admin	ctos aes128-cbc-hmac-md5
				stoc aes128-cbc-hmac-md5
Console#disconnect		0		4-25
Console#

Configuring Port Security

Port security is a feature that allows you to configure a switch port with one or more device MAC addresses that are authorized to access the network through that port.

When port security is enabled on a port, the switch stops learning new MAC addresses on the specified port when it has reached a configured maximum number. Only incoming traffic with source addresses already stored in the dynamic or static address table will be accepted as authorized to access the network through that port. If a device with an unauthorized MAC address attempts to use the switch port, the intrusion will be detected and the switch can automatically take action by disabling the port and sending a trap message.

To use port security, specify a maximum number of addresses to allow on the port and then let the switch dynamically learn the <source MAC address, VLAN> pair for frames received on the port. Note that you can also manually add secure addresses to the port using the Static Address Table (page 3-121). When the port has reached the maximum number of MAC addresses the selected port will stop learning. The MAC addresses

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