HP J3188A Manuale Utente Scaricare il pdf (Pagina 79)

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Security Information

How Eavesdrop Prevention Works

Security Information

Assigning the Authorized MAC address

You can assign an authorized MAC address by entering it manually at the hub

console interface or at the network management station. Assigning a specific

address provides the maximum control of the port’s authorized MAC address.

The Intruder Prevention and Eavesdrop Prevention security that you have

configured for that port is implemented as soon as the address is

assigned.Learning the Authorized MAC address

You can set the hub to learn a port’s authorized MAC address automatically

by using either a “first heard” or a “learn continuous” method. The method

used to learn the authorized MAC address should be chosen based on the level

of data security required on a port. In each case, the security configuration for

that port is implemented when the port receives a packet from the attached

device. It learns the device’s address from the source address field in the

packet.

First-Heard Method. The “first heard” method automatically assigns the

first address detected on the port as the authorized MAC address. This method

is useful to quickly identify and authorize end users whose ports may require

both Eavesdrop Prevention and Intruder Prevention. Under this method, the

port will be disabled automatically if an intruder is detected on the port.

Learn-Continuous Method. The “learn continuous” method allows the hub

to continuously update the authorized MAC address configured for a port.

Each new device connected to the port becomes the new authorized device.

This security method is useful for dynamic workgroups that experience

frequent changes to end-user configuration and but require minimal data

security protection. In the “learn continuous” mode, the port may be config-

ured to provide the Eavesdrop Prevention data security and the send-alarm

security violation notification. Under this method, the port will not be disabled

if an intruder is detected.

MUCHO.BK : CF.FM5 Page 3 Thursday, June 26, 1997 11:37 AM

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