How To protect Cisco Devices against CDP Flood Attack
How To protect Cisco Devices against CDP Flood Attack
Cisco Discovery Protocol (CDP) is a Data Link Layer Protocol used to share info without other devices directly connected to the switch or router.
With a CDP Flood the whole switch is overloaded, the MAC table also overflows and this can cause the switch to forward frames out of all ports which is likely as a hub.
In order to test this attack we will Fire up Kali Linux or any Linux OS and Install Yersinia ( Note: Yersinia is a framework which is used to preform layer 2 attacks and test weaknesses in the network).
To Stop CDP Floods its good to Disable CDP using the command:
#no cdp run on switches or routers, not only the end node facing interfaces..the whole switch or router.
Disclaimer : Yersinia the testing cracking tool is used on my private network for learning purposes.
This only for educational purposes and don’t try this on real networks which you don’t own.
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