C
HAPTER
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| Security Measures
Configuring Port Security
– 381 –
To show a list of IP addresses authorized for management access:
1. Click Security, IP Filter.
2. Select Show from the Action list.
Figure 208: Showing IP Addresses Authorized for Management Access
CONFIGURING PORT SECURITY
Use the Security > Port Security page to configure the maximum number
of device MAC addresses that can be learned by a switch port, stored in the
address table, and authorized to access the network.
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
address table will be 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.
CLI REFERENCES
â—† "Port Security" on page 866
COMMAND USAGE
â—† The default maximum number of MAC addresses allowed on a secure
port is zero (that is, disabled). To use port security, you must configure
the maximum number of addresses allowed on a port.
â—† To configure the maximum number of address entries which can be
learned on a port, specify the maximum number of dynamic addresses
allowed. The switch will learn up to the maximum number of allowed
address pairs <source MAC address, VLAN> for frames received on the
port. When the port has reached the maximum number of MAC
addresses, the port will stop learning new addresses. The MAC
addresses already in the address table will be retained and will not be
aged out.
Note that you can manually add additional secure addresses to a port
using the Static Address Table (page 229).
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