HP 635n Practical IPsec Deployment for Printing and Imaging Devices - Page 15

Flood Open

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and there is only so much memory in a switch. If we can fill up with Switch MAC table with false addresses, then every address that the switch receives for a valid device it will have to flood out all ports. In other words, fill up the Switch MAC table and you can make it act like an Ethernet repeater! Refer to Figure 13 - Flood Open Figure 13 - Flood Open Jane uses a tool called Ettercap which can generate thousands of random and bogus MAC addresses to do exactly that. This forces many Ethernet switches to flood all packets they receive to all ports - making it act just like an Ethernet Repeater! When the switch is in flood open mode, Jane uses Wireshark to capture the important information just as she did when she had actually connected an Ethernet repeater. Refer to Figure 14 - Flood Open Part 2. 15

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15
and there is only so much memory in a switch.
If we can fill up with Switch MAC table with false
addresses, then every address that the switch receives for a valid device it will have to flood out all
ports.
In other words, fill up the Switch MAC table and you can make it act like an Ethernet repeater!
Refer to Figure 13 – Flood Open
Figure 13 - Flood Open
Jane uses a tool called Ettercap which can generate thousands of random and bogus MAC addresses
to do exactly that.
This forces many Ethernet switches to flood all packets they receive to all ports –
making it act just like an Ethernet Repeater!
When the switch is in flood open mode, Jane uses
Wireshark to capture the important information just as she did when she had actually connected an
Ethernet repeater.
Refer to Figure 14 – Flood Open Part 2.