Cisco Cisco Email Security Appliance C680 릴리즈 노트

See the “System Administration” chapter in the Cisco IronPort AsyncOS for Email Configuration Guide 
for more information.

Starting in AsyncOS 7.6, the Email Security appliance can encrypt messages up to 10 MB in size. If the 
appliance attempts to encrypt a message larger than 10 MB, it will be send the message back to the 
sender.

AsyncOS 7.6 for Email includes additional protection from cross-site request forgeries (CSRF) and other 
attacks on the web user interface.

You can upgrade to release 7.6.1-022 from the following versions:

7.1.5-101

7.5.1-102

7.5.2-014

7.6.0-444

7.6.1-021

To ensure a successful upgrade, you must complete some steps before you start the upgrade process. For 
details on these prerequisites, see 

.

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

When you upgrade AsyncOS for Email 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.

Verify you read the list of known issues and limitations before you upgrade AsyncOS for Email. For a 
list of all known issues, see 

.