The BIND 9.x server implementation must maintain at least three file versions of the local log file.

DNS software administrators require DNS transaction logs for a wide variety of reasons including troubleshooting, intrusion detection, and forensics. Ensuring that the DNS transaction logs are recorded on the local system will provide the capability needed to support these actions.

Verify that the BIND 9.x server is configured to retain at least three versions of the local log file.

Inspect the "named.conf" file for the following:

logging { channel local_file_channel { file "path_name" versions 3; size 10m; };

If the "versions" variable is not defined, this is a finding.

If the "versions" variable is configured to retain fewer than three versions of the local log file, this is a finding.

Edit the "named.conf" file.

Add the "versions" variable to the end of the "file" sub-statement in the channel statement.

Configure the "versions" sub-statement to a number that is greater than or equal to "3".

Restart the BIND 9.x process.