Cisco Cisco Email Security Appliance C160 Mode D'Emploi

This section describes the new features and enhancements in AsyncOS for Email Security 7.6. For more 
information about the release, see the product release notes, which are available on the Cisco IronPort 
Customer Support page at the following URL:

http://www.cisco.com/web/ironport/index.html

You might also find it useful to review release notes for earlier releases to see the features and 
enhancements that were previously added. To view those release notes on the Support Portal, click the 
Earlier Releases link on the appropriate appliance documentation page.

AsyncOS 7.6 adds Internet Protocol Version 6 (IPv6) address compatibility to your Email Security 
appliance. You can use both IPv4 and IPv6 addresses for your appliance’s IP interfaces. IPv6 addresses 
are also an option for the following features:

Gateways (default routers) and static routes.

SMTP routes.

SMTP Call Ahead.

Trace.

Senders for Host Access Tables.

Recipients for Recipient Access Tables.

Content Filter’s Remote IP condition and Send to Alternate Destination Host action.

Destination Controls, where you can specify whether IPv4 or IPv6 addresses are preferred.