Cisco Cisco Email Security Appliance C190 用户指南
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Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
Chapter 3 LDAP Queries
Figure 3-12
Configuring the Acceptance Query in the SMTP Conversation
Once you configure LDAP acceptance queries for the listener, you must configure
DHAP settings in the mail flow policy associated with the listener.
DHAP settings in the mail flow policy associated with the listener.
Figure 3-13
Configuring the Mail Flow Policy to Drop Connections in the
SMTP Conversation
SMTP Conversation
In the mail flow policy associated with the listener, configure the following
Directory Harvest Attack Prevention settings:
Directory Harvest Attack Prevention settings:
•
Max. Invalid Recipients Per hour. The maximum number of invalid
recipients per hour this listener will receive from a remote host. This
threshold represents the total number of RAT rejections combined with the
total number of messages to invalid LDAP recipients dropped in the SMTP
conversation or bounced in the work queue. For example, you configure the
threshold as five, and the counter detects two RAT rejections and three
recipients per hour this listener will receive from a remote host. This
threshold represents the total number of RAT rejections combined with the
total number of messages to invalid LDAP recipients dropped in the SMTP
conversation or bounced in the work queue. For example, you configure the
threshold as five, and the counter detects two RAT rejections and three