Upgrading ASL

ASL 3.0

ASL 3.0 uses the internal upgrade management system in ASL. You can upgrade ASL by following these steps:

Automatic Upgrade

Step 1) Check to make sure you have ASL set to upgrade itself:

Check the file /etc/asl/config to ensure that UPDATE_TYPE is set to "all".

Step 2) Run this command as root:

asl -u

Step 3) Set the new security policy, by running this command as root:

asl -s -f

This configures all of the ASL updates for your unique system. This command is perfectly safe to run at any time, even if you have not upgraded any ASL components.

Step 4) Please see the release notes, which include additional information when upgrading from 2.2 to 3.0:

Atomic_Secured_Linux#ASL_3.0_Release_Notes

Manual Upgrade

If you do not want your system to automatically upgrade ASL, you can also upgrade manually with these commands (run them as root):

Step 1) yum upgrade asl asl-web mod_security kernel

Note: If you have a PAE kernel installed, you will need to replace "kernel" with "kernel-PAE".

Step 2) asl -u

Step 3) asl -s -f

Step 4) Please see the release notes, which includes additional information when upgrading from 2.2 to 3.0:

Atomic_Secured_Linux#ASL_3.0_Release_Notes

Notes for 3.0 Upgrades

In addition to the release notes referenced above, you can check to see if you are running 3.0 by running this command as root:

asl -v

You should see an output similar to this:

ASL Version 3.0: CentOS 5 (SUPPORTED)

The "Centos 5" element will vary depending on your OS. If you see "UNSUPPORTED", you either not running the latest version of 3.0, or your OS may not be supported. The current list of OSes supported is documented on the Supported_Platforms_for_ASL wiki page.

If your OS is supported, and the upgrade is failing, this is more than likely caused by yums cache requiring a flush. Run this command as root to flush the cache:

yum clean all

And then try the upgrade again.

ASL 2.2

ASL 2.2 uses the RPM package management system. You can upgrade ASL by using the following command:

yum upgrade

When you have completed upgrading any component of ASL you must run this command to finish configuring your system:

asl -s -f

This configures all of the ASL updates for your unique system. This command is perfectly safe to run at any time even if you have not upgraded any ASL components.

ASL 3.0

ASL 3.0 uses the RPM package management system. You can upgrade ASL by using the following command:

yum upgrade

When you have completed upgrading any component of ASL you must run this command to finish configuring your system:

asl -s -f

This configures all of the ASL updates for your unique system. This command is perfectly safe to run at any time even if you have not upgraded any ASL components.

Automatic Upgrade system

Since version 2.1, ASL has the ability to automatically update itself. This is configurable from the ASL GUI. The option in the GUI is: UPDATE_TYPE. There are three modes:

• all - This will configure ASL to automatically upgrade all of its components, including the rules. This is the most secure option.
• exclude-kernel - This will configure ASL to upgrade all of its components, including the rules, but will not upgrade the kernel. This is the second most secure option.
• rules-only - This option will configure ASL to only keep the rules up to date. This is the least secure option.

You can also configure the frequency at which ASL checks for updates by configuring the AUTOMATIC_UPDATES setting in the GUI. You can configure ASL to check for updates:

• daily
• hourly
• none