Cisco Cisco Web Security Appliance S360 User Guide

AsyncOS periodically queries the update servers for new updates to all security service components, but 
not for new AsyncOS upgrades. To upgrade AsyncOS, you must manually prompt AsyncOS to query for 
available upgrades. You can also manually prompt AsyncOS to query for available security service 
updates. For more information, see 

When AsyncOS queries an update server for an update or upgrade, it performs the following steps:

Contacts the update server.

Cisco allows the following sources for update servers:

Cisco update servers. For more information, see 

.

Local server. For more information, see 

Receives an XML file that lists the available updates or AsyncOS upgrade versions. This XML file 
is known as the “manifest.”

Downloads the update or upgrade image files.

By default, each security service component periodically receives updates to its database tables from the 
Cisco update servers. However, you can manually update the database tables. 

Some updates are available on demand from the GUI pages related to the feature.

View a record of update activity in the updater log file. Subscribe to the updater log file on the System 
Administration > Log Subscriptions page.

Updates that are in-progress cannot be interrupted. All in-progress updates must complete before new 
changes can be applied. 

Choose System Administration > Upgrade and Update Settings.

Click Edit Update Settings.

Specify the location of the update files.

Initiate the update using the Update Now function key on the component page located on the Security 
Services tab. For example, Security Services > Web Reputation Filters page.

The CLI and the Web application interface may be sluggish or unavailable during the update process.