Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

 describes the update settings you can configure. 

Choose whether to download Cisco IronPort AsyncOS upgrade images and 
service updates from the Cisco IronPort update servers or a from a local web 
server. The default is the Cisco IronPort update servers for both upgrades 
and updates.

In addition to AsyncOS upgrades, these servers are used to obtain update 
images for Sophos and McAfee Anti-Virus definitions, Cisco IronPort 
Anti-Spam and Cisco IronPort Intelligent Multi-Scan rules, Outbreak Filter 
rules, time zone rules, feature key updates, and PXE Engine updates.

To view settings for AsyncOS upgrades, click the Click to use different 
settings for AsyncOS link.

You might want to choose a local web server to:

Download images from Cisco IronPort, if you need to enter a static 
address provided by Cisco IronPort Customer Support.

Download Cisco IronPort AsyncOS upgrade images at your 
convenience. (You can still download service update images 
dynamically from the Cisco IronPort update servers.)

When you choose a local update server, enter the base URL and port number 
for the servers used to download the upgrades and updates. If the server 
requires authentication, you can also enter a valid user name and password.

Cisco IronPort Intelligent Multi-Scan requires a second local server 
to download updates for third-party anti-spam rules.

Choose whether to download the lists of available upgrades and service 
updates (the manifest XML files) from the Cisco IronPort update servers or 
from a local web server. The manifest XML file includes updates for 
different security components, such as McAfee Anti-Virus and the PXE 
Engine, as well as AsyncOS upgrades.

The default for both upgrades and updates is the Cisco IronPort update 
servers. There are separate sections for specifying servers for updates and 
for AsyncOS upgrades.

If you choose local update servers, enter the full path to the manifest XML 
file for each list including the file name and port number for the server. If 
you leave the port field blank, AsyncOS uses port 80. If the server requires 
authentication, you can also enter a valid user name and password.

For more information, see 

Enable automatic updates and the update interval (how often the appliance 
checks for updates) for Sophos and McAfee Anti-Virus definitions, Cisco 
IronPort Anti-Spam rules, Cisco IronPort Intelligent Multi-Scan rules, PXE 
Engine updates, Outbreak Filter rules, and time zone rules.

Choose which network interface to use when contacting the update servers 
for the listed security component updates and Cisco IronPort AsyncOS 
upgrades. The available proxy data interfaces are shown. By default, the 
appliance selects an interface to use.