Allied Telesis AT-8000GS User's Guide download pdf (Page 47)

Configuring Device Security

Configuring Network Security

Page 47

Configuring Network Security

Network security manages locked ports.

Port-based authentication provides traditional 802.1x support, as well as, Guest VLANs. Guest VLANs limited

network access to authorized ports. If a port is denied network access via port-based authorization, but the Guest

VLAN is enabled, the port receives limited network access. For example, a network administrator can use Guest

VLANs to deny network access via port-based authentication, but grant Internet access to unauthorized users.

This section contains the following topics:

• Managing Port Security

• Defining 802.1x Port Access

• Enabling Storm Control

Managing Port Security

Network security can be increased by limiting access on a specific port only to users with specific MAC addresses.

The MAC addresses can be dynamically learned or statically configured. Locked port security monitors both

received and learned packets that are received on specific ports. Access to the locked port is limited to users with

specific MAC addresses. These addresses are either manually defined on the port, or learned on that port up to

the point when it is locked. When a packet is received on a locked port, and the packet source MAC address is not

tied to that port (either it was learned on a different port, or it is unknown to the system), the protection mechanism

is invoked, and can provide various options. Unauthorized packets arriving at a locked port are either:

• Forwarded with or without a trap

• Discarded with or without a trap

• Shuts down the port with or without a trap.

Locked port security also enables storing a list of MAC addresses in the configuration file. The MAC address list

can be restored after the device has been reset. Disabled ports are activated from the Port Security Page.

The Port Security Page enhances network security by providing port locking management to network

administrators.

To configure secure ports:

1. Click Network Security > Port Security. The Port Security Page opens:

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Allied Telesis AT-8000GS User's Guide Page 47