1. Go to: Status > Maintenance > Update Center
2. Disable the setting Maintenance Releases
3. Disable the setting Feature Releases
4. Click OK
2.7.2. Auto-Update Mechanism
A number of the NetDefendOS security features rely on external servers for automatic updates
and content filtering. The Intrusion Prevention and Detection system and Anti-Virus modules
require access to updated signature databases in order to provide protection against the latest
threats.
To facilitate the Auto-Update feature D-Link maintains a global infrastructure of servers
providing update services for NetDefend Firewalls. To ensure availability and low response times,
NetDefendOS employs a mechanism for automatically selecting the most appropriate server to
supply updates.
For more details on these features see the following sections:
• Section 6.6, “Intrusion Detection and Prevention”
• Section 6.5, “Anti-Virus Scanning”
• Section 6.3, “Web Content Filtering”
2.7.3. Backing Up Configurations
The administrator has the ability to take a snapshot of a NetDefendOS system at a given point in
time and restore it when necessary. The snapshot can be of two types:
• A Configuration Backup
This is the entire current NetDefendOS configuration saved into a single file. It does not
include the installed NetDefendOS version. This is useful when restoring only the
configuration.
It is important to create, at the minimum, a configuration backup on a regular basis so that a
configuration can be easily recreated in the event of hardware replacement. The alternative is
to recreate a configuration by manually adding its contents, piece by piece.
• A System Backup
This a complete backup of both the configuration and the installed NetDefendOS software
saved into a single file. This is useful if restoring both the configuration and the NetDefendOS
version upgraded.
A complete system backup is a much larger file than a configuration backup and can be
many megabytes, it is therefore not recommended to perform this on a regular basis because
of the time involved. However, it is recommended to create this at least once when the
NetDefend Firewall is initially configured and goes live. This is because it a full system backup
makes it easier to restore the current configuration on new hardware.
Chapter 2: Management and Maintenance
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