Hardware and Software Requirements for Remote Upgrades

For downloading AsyncOS upgrade files, you must have a system in your internal network that has:

  • Internet access to the update servers for Cisco content security appliances.
  • A web browser.
Note
For this release, 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.

For hosting AsyncOS update files, you must have a server in your internal network that has:

  • A web server — for example, Microsoft IIS (Internet Information Services) or the Apache open source server — that:
    • 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 update image