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200-201 Practice Question: An analyst reviews the Cisco ASA syslog message…

Exhibit

Refer to the exhibit.
%ASA-4-106023: Deny tcp src outside:203.0.113.45/56789 dst inside:10.1.1.100/80 by access-group "outside_in"

An analyst reviews the Cisco ASA syslog message shown in the exhibit. What does this entry indicate?

⚠ Common exam trap

Cisco often tests the ability to distinguish between different syslog message IDs (e.g., 106023 for ACL denies vs. 305006 for NAT failures) and to correctly interpret the 'Deny' keyword as a block, not a successful connection.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

An attempted connection from an external host to an internal web server that was blocked by the firewall

The syslog message shows a deny action for an HTTP connection (port 80) from an external IP (outside) to an internal IP (inside). The '%ASA-4-106023' message indicates a packet was denied by the firewall's access control list (ACL). This matches the scenario of an attempted external-to-internal web connection being blocked, which is option C.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • A successful HTTP connection from the outside to the inside server

    Why it's wrong here

    The message clearly states "Deny", not "Permit".

  • A VPN tunnel initiation that was rejected due to authentication failure

    Why it's wrong here

    There is no indication of VPN or authentication in the message.

  • An attempted connection from an external host to an internal web server that was blocked by the firewall

    Why this is correct

    Correctly describes the denied inbound TCP connection to port 80.

  • A NAT translation failure for an outbound connection

    Why it's wrong here

    The source is outside and destination inside, indicating an inbound connection; no NAT failure is mentioned.

Visual reference

Source Router + ACL permit 10.0.0.0/8 deny any Server 10.0.0.5 ✓ 192.168.1.1 ✗ dropped ACLs evaluate top-down; first match wins — implicit deny all at end

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 200-201 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-201 exam.