Cisco Cisco Email Security Appliance C170

Prior to AsyncOS 7.6.3, a DLP custom classifier can only be created as part of a custom DLP policy and 
cannot be reused in other custom DLP policies. After upgrading to AsyncOS 7.6.3, you can:

Create reusable DLP custom classifiers that can be used across multiple DLP policies. 

Reuse the previously configured DLP custom classifiers in other DLP policies. 

After the upgrade, previously configured custom classifiers will be listed on the DLP Policy 
Customizations page. You can use this page to view, edit, or delete previously configured custom 
classifiers or add new custom classifiers. This page can be accessed by clicking Mail Policies > DLP 
Policy Customizations.

You cannot delete the DLP custom classifiers that are currently being used by a DLP policy. You must 
first remove the DLP custom classifier from all DLP policies that are using it before AsyncOS allows 
you to delete it.

The Delete button for any DLP custom classifiers that are currently being used by a DLP policy is 
disabled.

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.

Outbreak Filters’ Bypass Domain Scanning field.

Report searches.

AsyncOS supports the following formats for IPv6 addresses:

2620:101:2004:4202::0-2620:101:2004:4202::ff

2620:101:2004:4202::

2620:101:2004:4202::23

2620:101:2004:4202::/64