Asante IntraCore 36000 Series, Руководство пользователя

Страница: 67 / 385

User’s Manual 67
CLI
This example sets the command mode to Port 5, sets the port security action to send a trap and disable the
port, and then enables port security for the switch.
Console(config)# interface ethernet 1/5
Console(config-if)# port security action trap-and-shutdown
Console(config-if)# port security
Console(config-if)#
6.6 Configuring 802.1x Port Authentication
Network switches can provide open and easy access to network resources by simply attaching a client PC.
Although this automatic configuration and access is a desirable feature, it also allows unauthorized
personnel to easily intrude and possibly gain access to sensitive network data.
The IEEE 802.1x (dot1x) standard defines a port-based access control procedure that prevents
unauthorized access to a network by requiring users to first submit credentials for authentication. Access to
all switch ports in a network can be centrally controlled from a server, which means that authorized users
can use the same credentials for authentication from any point within the network.
This switch uses the Extensible Authentication Protocol over LANs (EAPOL) to exchange authentication
protocol messages with the client, and a remote RADIUS authentication server to verify user identity and
access rights. When a client (For example, Supplicant) connects to a switch port, the switch (For example,
Authenticator) responds with an EAPOL identity request. The client provides its identity (such as a user
name) in an EAPOL response to the switch, which it forwards to the RADIUS server. The RADIUS server
verifies the client identity and sends an access challenge back to the client. The EAP packet from the
RADIUS server contains not only the challenge, but also the authentication method to be used. The client
can reject the authentication method and request another, depending on the configuration of the client
software and the RADIUS server. The authentication method currently supported is MD5 only. The client
responds to the appropriate method with its password. The RADIUS server verifies the client credentials and
responds with an accept or reject packet. If authentication is successful, the switch allows the client to
access the network. Otherwise, network access is denied and the port remains blocked.
The operation of 802.1x on the switch requires the following:
•
The switch must have an IP address assigned.
•
RADIUS authentication must be enabled on the switch and the IP address of the RADIUS server
specified.
•
Each switch port that will be used must be set to dot1x “Auto” mode.