# CPU Protection Blacklist

A blacklist contains information about denial of service (DoS) attack traffic. When a packet matches a blacklist entry, the security device drops the packet.

This page lists the blacklist entries that you have configured on the security device. The security device displays the following information for each entry:

- ID: ID of the blacklist entry.

- Source IP/Netmask: Source IP address and netmask of the DoS attack packet.

- Dest IP/Netmask: Destination IP address and netmask of the DoS attack packet.

- Source Port: Source port number of the DoS attack packet.

- Dest Port: Destination port number of the DoS attack packet.

- Protocol Num: Protocol number of the DoS attack packet.

- Timeout: Length of time before the security device removes a blacklist entry.

- Configure: Click Edit to modify the blacklist entry. Click Remove to delete the blacklist entry.

Note: If you want to delete all the entries, click Remove All.

To Add a New Blacklist Entry

Click New. For more information about creating a new blacklist entry, see Blacklist Configuration.