Cisco Cisco Web Security Appliance S170 사용자 가이드
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AsyncOS 9.1.1 for Cisco Web Security Appliances User Guide
Chapter 22 Perform System Administration Tasks
AsyncOS for Web Upgrades and Updates
Upgrading from a Local Server
The Web Security appliance can download AsyncOS upgrades from a server within your network instead
of obtaining upgrades directly from the Cisco update servers. When you use this feature, you download
the upgrade image from Cisco once only, and then serve it to all Web Security appliances in your
network.
of obtaining upgrades directly from the Cisco update servers. When you use this feature, you download
the upgrade image from Cisco once only, and then serve it to all Web Security appliances in your
network.
Figure 22-1
shows how Web Security appliances download upgrade images from local servers.
Figure 22-1
Upgrading from a Local Server
Hardware and Software Requirements for Local Upgrade Servers
For downloading AsyncOS upgrade files, you must have a system in your internal network that has a
web browser and Internet access to the Cisco update servers.
web browser and Internet access to the Cisco update servers.
Note
If you need to configure a firewall setting to allow HTTP access to this address, you must configure it
using the DNS name and not a specific IP address.
using the DNS name and not a specific IP address.
For hosting AsyncOS upgrade files, a server on the internal network must have a web server, such as
Microsoft IIS (Internet Information Services) or the Apache open source server, which has the following
features:
Microsoft IIS (Internet Information Services) or the Apache open source server, which has the following
features:
•
Supports the display of directory or filenames in excess of 24 characters.
•
Has directory browsing enabled.
•
Is configured for anonymous (no authentication) or Basic (“simple”) authentication.
•
Contains at least 350MB of free disk space for each AsyncOS upgrade image.