Cisco Cisco Content Security Management Appliance M1070 Mode D'Emploi

 describes the update and upgrade settings you can configure. 

Choose whether to download Cisco IronPort AsyncOS upgrade and service 
update software images, such as time zone rules and Feature Key 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. 

You might want to use a local web server if :

You need to download images to your appliance from a static address. 
See 

You want to download Cisco IronPort AsyncOS upgrade images to 
your appliance 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. 

For more information, see 

 and 

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 default for both upgrades and updates is the Cisco IronPort update 
servers. You can choose different settings for upgrades and for updates. 

If applicable, see 

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 

 and 

Choose whether or not to enable automatic updates for time zone rules. 
When enabled, enter the time to wait between checks for updates. Add a 
trailing m for minutes, h for hours, and d for days.

Choose which network interface to use when contacting the update servers 
for time zone rules and AsyncOS upgrades. The available proxy data 
interfaces are shown. By default, the appliance selects an interface to use.

If an upstream HTTP proxy server exists and requires authentication, enter 
the server information and user name and password here. 

Note that if you specify a proxy server, it will be used to access and update 
the services listed in the GUI.