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Updated: Aug 30, 2026

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Lpi 117-303 Exam Overview:

Certification Vendor:Linux Professional Institute (LPI)
Exam Name:LPIC-3 Security 303 Exam
Exam Number:303-300 (commonly referred to as 117-303 in some training catalogs)
Related Certifications:LPIC-3 Mixed Environment
LPIC-2
LPIC-3 Virtualization and Containerization
LPIC-1
Exam Price:USD 200–300 (varies by region)
Passing Score:500 out of 800
Exam Duration:90 minutes
Real Exam Qty:60 (typically)
Available Languages:Spanish, English, Portuguese, Japanese
Exam Format:Multiple choice, Multiple selection, Fill-in-the-blank
Certificate Validity Period:5 years
Recommended Training:LPI Official Training Materials
Linux Professional Institute Training Resources
Exam Registration:LPI Official Certification Page
Pearson VUE Registration Portal
Sample Questions:Lpi 117-303 Sample Questions
Exam Way:Computer-based exam delivered via Pearson VUE test centers or online proctored exam.
Pre Condition:Valid LPIC-2 certification is required before taking LPIC-3 Security exam.
Official Syllabus URL:https://www.lpi.org/our-certifications/lpic-3-303-security/

Lpi 117-303 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Network Security25%- VPN and secure tunneling
  • 1. IPsec fundamentals
    • 2. WireGuard/OpenVPN concepts
      - Secure communication
      • 1. TLS/SSL concepts and configuration
        • 2. SSH configuration and hardening
          Topic 2: Threats and Vulnerability Assessment15%- Security scanning
          • 1. Network scanning tools and techniques
            • 2. Vulnerability assessment concepts
              - Intrusion Detection
              • 1. Host-based IDS (HIDS)
                • 2. Network-based IDS (NIDS)
                  Topic 3: Organizational Security15%- Incident Response
                  • 1. Forensics basics
                    • 2. Incident handling lifecycle
                      - Security Policies
                      • 1. Audit and compliance basics
                        • 2. Security governance concepts
                          Topic 4: Cryptography25%- Data Encryption
                          • 1. Disk and filesystem encryption
                            • 2. Symmetric and asymmetric encryption concepts
                              - Public Key Infrastructure (PKI)
                              • 1. Certificate management tools
                                • 2. Certificates and certificate authorities
                                  Topic 5: Host Security20%- System hardening
                                  • 1. Kernel security parameters
                                    • 2. Secure boot and firmware security
                                      - Access Control
                                      • 1. Linux file permissions and ACLs
                                        • 2. Mandatory Access Control (AppArmor/SELinux concepts)

                                          Lpi LPI Level 3 Exam (LPI 303: Security) Sample Questions:

                                          Question 1

                                          CORRECT TEXT
                                          Which utility is used for retrieving, setting, and removing NFSv4 ACLs? (Supply only the command name, with no options or parameters)


                                          Question 2

                                          The system administrator wishes to use the pam_listfile.so module to restrict which users are allowed to login via SSH. Which line will configure this behaviour?

                                          A. auth required pam_listfile.so item=user sense=deny file=/etc/sshd/sshd.deny onerr=fail
                                          B. auth required pam_listfile.so item=user sense=deny file=/etc/sshd/sshd.deny onerr=succeed
                                          C. auth required pam_listfile.so item=user sense=allow file=/etc/sshd/sshd.allow onerr=succeed
                                          D. auth required pam_listfile.so item=user sense=allow file=/etc/sshd/sshd.allow onerr=fail


                                          Question 3

                                          An administrator can prevent dictionary based attacks against an OpenSSH server by forcing keybased authentication with which TWO parameters in sshd_config?

                                          A. PubkeyAuthentication
                                          B. PrivatekeyAuthentication
                                          C. ServerKey
                                          D. HostKey
                                          E. PasswordAuthentication


                                          Question 4

                                          You wish to revoke write access for all groups and named users on a file. Which command will make the correct ACL changes?

                                          A. setfacl m group:*:rx,user:*:rx afile
                                          B. setfacl x group:*:rx,user:*:rx afile
                                          C. setfacl x mask::rx afile
                                          D. setfacl m mask::rx afile


                                          Question 5

                                          What is the syntax error in the following simple Puppet configuration file?
                                          class test_class { file { "/tmp/test.txt": mode => 600, owner => root, group => root } } # Define the node node testclient { isa test_class }

                                          A. class, node and file sections require a semicolon (;) at the end of their definitions.
                                          B. isa should be include.
                                          C. Comments begin with // character and not a #.
                                          D. The colon (:) after /tmp/test.txt should be a semicolon (;).


                                          Solutions:

                                          Question 1
                                          Answer: Only visible for members
                                          Question 2
                                          Answer: D
                                          Question 3
                                          Answer: A,E
                                          Question 4
                                          Answer: D
                                          Question 5
                                          Answer: B

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