User manual

Network Services
Cobalt Qube 3 User Manual 149
Basic Firewall
A firewall provides network security through a set of rules that restrict the flow of
information between your Qube 3 and your network. It is also used to control the
information that your Qube 3 allows to pass between different networks (such as
your company’s intranet and the public Internet.
For more information on how the Basic Firewall feature on the Qube 3 functions,
see “Basic Firewall” on page 57.
On this screen, the Qube 3 Administrator can:
• enable and disable your firewall
• create and edit rules for each of the three rule chains
• re-order your rules within each rule chain
• change the default policy for each rule chain
!
Caution: Basic Firewall is an advanced feature of your Qube 3
server. This feature is not recommended for novice users.
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Note: The Web Caching feature on your Qube 3 (available on the
Qube 3 Professional Edition and Business Edition only) relies on
the Basic Firewall feature to operate. If you enable the Web
Caching feature, the Basic Firewall feature is enabled
automatically.
If you disable the Basic Firewall feature, the Web Caching feature
is still enabled but will not function. To ensure that the Web
Caching feature is functioning, re-enable the Basic Firewall feature.
For more information, see “Web Caching” on page 60.