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| Section | Objectives |
|---|---|
| Content Filtering and Data Protection | - Data loss prevention (DLP) integration - Policy-based content filtering |
| Monitoring, Reporting, and Troubleshooting | - System monitoring and logging - Troubleshooting mail delivery issues |
| Email Security Fundamentals | - Email threats landscape and attack types - Email security concepts and protocols |
| Email Encryption and Security Policies | - Policy enforcement and rule sets - Encryption methods and configuration |
| Anti-Spam and Anti-Malware Technologies | - Virus and malware filtering - Spam detection techniques |
| Cisco Email Security Appliance (ESA) Deployment | - Initial setup and configuration - Mail flow architecture and routing |
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問題 #19
A network administrator is modifying an outgoing mail policy to enable domain protection for the organization. A DNS entry is created that has the public key.
Which two headers will be used as matching criteria in the outgoing mail policy? (Choose two.)
答案：B,C
解題說明：
To enable domain protection for the organization, the administrator must configure an outgoing mail policy that matches the sender and the from headers of the email. The sender header is the envelope sender address that is used by SMTP to route the email. The from header is the address that is displayed to the recipient as the source of the email. These headers are used to generate and verify a DomainKeys Identified Mail (DKIM) signature, which is a cryptographic method of validating the authenticity and integrity of an email message.
The other headers are not relevant for domain protection. The message-ID header is a unique identifier for each email message. The URL reputation header is a score that indicates the likelihood of a URL being malicious. The mail-from header is an alias for the sender header.
Reference:
Domain Protection
DKIM Signing
問題 #20
Drag and drop the Cisco ESA reactions to a possible DLP from the left onto the correct action types on the right.
答案：
解題說明：
問題 #21
A network administrator notices that there are a high number of queries to the LDAP server. The mail logs show an entry "550 Too many invalid recipients | Connection closed by foreign host." Which feature must be used to address this?
答案：C
解題說明：
Reference:
https://www.cisco.com/c/en/us/td/docs/security/esa/esa12-0/user_guide/b_ESA_Admin_Guide_12_0/b_ESA_Admin_Guide_12_0_chapter_011010.html DHAP (Directory Harvest Attack Prevention) is a feature that must be used to address this issue. DHAP is a mechanism that allows Cisco ESA to prevent directory harvest attacks, which are attempts by spammers or hackers to obtain valid email addresses from an LDAP server by sending messages with random or guessed recipients and checking for bounce messages.
To enable DHAP on Cisco ESA, the network administrator can follow these steps:
Select Network > Listeners and click Edit Settings for the listener that receives incoming messages.
Under SMTP Authentication Settings, select Enable Directory Harvest Attack Prevention.
Enter a value for Maximum Invalid Recipients per Hour, which is the number of invalid recipients that triggers DHAP.
Enter a value for Block Sender for (hours), which is the duration that Cisco ESA blocks messages from senders who exceed the maximum invalid recipients per hour.
Click Submit.
問題 #22
Refer to the exhibit. An engineer needs to change the existing Forged Email Detection message filter so that it references a newly created dictionary named 'Executives'.
What should be done to accomplish this task?
答案：C
解題說明：
https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/BRKSEC-2240.pdf
問題 #23
Which process is skipped when an email is received from safedomain.com, which is on the safelist?
答案：C
解題說明：
Explanation/Reference: https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/214269-filter-to- handle-messages-that-skipped-d.html
問題 #24
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