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An engineer has enabled LDAP accept queries on a listener. Malicious actors must be prevented from quickly identifying all valid recipients. What must be done on the Cisco ESA to accomplish this goal?

A.

Configure incoming content filters

Answers
A.

Configure incoming content filters

B.

Use Bounce Verification

Answers
B.

Use Bounce Verification

C.

Configure Directory Harvest Attack Prevention

Answers
C.

Configure Directory Harvest Attack Prevention

D.

Bypass LDAP access queries in the recipient access table

Answers
D.

Bypass LDAP access queries in the recipient access table

Suggested answer: C

Explanation:

A Directory Harvest Attack (DHA) is a technique used by spammers to find valid/existent email addresses at a domain either by using Brute force or by guessing valid e-mail addresses at a domain using different permutations of common username. Its easy for attackers to get hold of a valid email address if your organization uses standard format for official e-mail alias (for example: [email protected]). We can configure DHA Prevention to prevent malicious actors from quickly identifying valid recipients.

Note: Lightweight Directory Access Protocol (LDAP) is an Internet protocol that email programs use to look up contact information from a server, such as ClickMail Central Directory. For example, here's an LDAP search translated into plain

English: "Search for all people located in Chicago who's name contains "Fred" that have an email address. Please return their full name, email, title, and description.

asked 10/10/2024
Mohamed Ismail
49 questions
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