Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Specify the system measurement frequency, whether to include Message-ID headers in mail logs, 
whether to include the remote response, and whether to include the original subject header of each 
message.

Enter any other headers you wish to include in the logs.

Submit and commit your changes.

To prevent log files on the appliance from becoming too large, AsyncOS performs a “rollover” and 
archives a log file when it reaches a user-specified maximum file size or time interval and creates a new 
file for incoming log data. Based on the retrieval method defined for the log subscription, the older log 
file is stored on the appliance for retrieval or delivered to an external computer. See 

 for more information on how to retrieve log files from the appliance.

When AsyncOS rolls over a log file, it performs the following actions:

Renames the current log file with the timestamp of the rollover and a letter “

” extension signifying 

saved.

Creates a new log file and designates the file as current with the “

” extension.

Transfers the newly saved log file to a remote host (if using the push-based retrieval method).

Transfers any previously unsuccessful log files from the same subscription (if using the push-based 
retrieval method).

Deletes the oldest file in the log subscription if the total number of files to keep on hand has been 
exceeded (if using the poll-based retrieval method).

You define a log subscription’s rollover settings when creating or editing the subscription using the 
System Administration > Log Subscriptions page in the GUI or the 

logconfig

 command in the CLI. The 

two settings available for triggering a log file rollover are:

A maximum file size. 

A time interval.

 shows the rollover settings available for log subscriptions in the GUI.