Cisco Cisco Firepower Management Center 2000

DNS resolution caching is a system-wide setting that allows the caching of previously resolved 
DNS lookups. To configure IP address resolution on a per-user-account basis, users must also 
select 

 from the 

 menu, enable 

, and then 

click 

. For information about configuring DNS servers, see 

. For information about configuring event view preferences, see 

In the 

 field, enter the number of minutes a DNS entry remains cached in 

memory before it is removed for inactivity. 

The default setting is 300 minutes (five hours).

Click 

.

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

 for more information.

Although DNS caching is enabled for the appliance, IP address resolution is not enabled on a per-user 
basis unless it is configured on the Events page accessed from the User Preferences menu.

Any

You must configure a mail host if you plan to:

email event-based reports

email status reports for scheduled tasks

email change reconciliation reports

email data pruning notifications

use email for discovery event, impact flag, and correlation event alerting

use email for intrusion event alerting

use email for health event alerting

You can select an encryption method for the communication between appliance and mail relay host, and 
can supply authentication credentials for the mail server if needed. After configuring settings, you can 
test the connection between the appliance and the mail server using the supplied settings.

Admin

Select 

.

The System Policy page appears.

You have the following options:

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

) next to the system 

policy.