Cisco Cisco Email Security Appliance C170

You can upgrade to release 9.5.0-201 from the following versions:

8.5.6-106

9.1.0-032 

9.5.0-144

Read through and consider the installation and upgrade impacts listed in this section. 

When you upgrade AsyncOS from the web interface or Command Line Interface (CLI), the 
configuration is saved to file in the /configuration/upgrade directory. You can access the upgrade 
directory using an FTP client. Each configuration file name is appended with the version number, and 
passwords in the configuration file are masked so they are not human readable.

You must be logged in as the admin to upgrade. Also, you must reboot the appliance after upgrading.

Important! The server pool used by the URL Reputation feature servers has changed. As a result, when 
you enable the URL Filtering feature, you may observe one of the following symptoms:

Work queue on your appliance backs up

A large number of 'Request already expired' entries in the web_client logs

Alerts indicating that your appliance is unable to connect to the Cisco Web Security Service

To fix this issue, you must reduce the number of URLs sent for verification at the same time.

Use SSH to access the command-line interface.

Enter 

websecurityadvancedconfig

.

Change the value of Enter the threshold value for outstanding requests from default value to 5. 

Make sure that you do not change any other settings.

Commit your changes.