Cisco Cisco Firepower Management Center 4000

The Database page appears.

For each of the databases, enter the number of records you want to store.

For information on how many records each database can maintain, see the 

 table.

Optionally, in the 

 field, enter the email address you want to receive 

notifications when intrusion events, discovery events, audit records, security intelligence data, or URL 
filtering data are pruned from the appliance’s database.

Note that you must also configure an email server. See 

 for more information.

Click 

.

The system policy is updated. Your changes do not take effect until you apply the system policy. See 

 for more information.

Any

If you have a DNS server configured on the Network page, you can configure the appliance to resolve 
IP addresses automatically on the event view pages. As a user assigned the Administrator role, you can 
also configure basic properties for DNS caching performed by the appliance. Configuring DNS caching 
allows you to identify IP addresses you previously resolved without performing additional lookups. This 
can reduce the amount of traffic on your network and speed the display of event pages when IP address 
resolution is enabled.

Admin

Select 

.

The System Policy page appears.

You have the following options:

To modify the DNS cache settings in an existing system policy, click the edit icon (

) next to the 

system policy.

To configure the DNS cache settings as part of a new system policy, click 

.

Provide a name and description for the system policy as described in 

, and click 

.

In either case, the Access List page appears.

Click 

.

The DNS Cache page appears.

Select 

from the 

 drop-down list to enable caching. Select 

 to disable 

it.