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Updated: Sep 30, 2026

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Lpi 303-300 Exam Overview:

Certification Vendor:Linux Professional Institute (LPI)
Exam Name:LPIC Exam 303: Security, Version 3.0
Exam Number:303-300
Certificate Validity Period:5 years
Passing Score:500/800
Related Certifications:LPIC-3 Security
Exam Format:Multiple Choice, Fill in the Blank
Available Languages:Japanese, English
Exam Price:$200 USD
Exam Duration:90 minutes
Real Exam Qty:60
Sample Questions:Lpi 303-300 Sample Questions
Exam Way:Pearson VUE Test Center or Online Proctored Exam (OnVUE)
Pre Condition:An active LPIC-2 certification is required to obtain the LPIC-3 Security certification. LPIC-2 and LPIC-3 exams may be taken in any order.
Official Syllabus URL:https://www.lpi.org/our-certifications/exam-303-objectives/

Lpi 303-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Access Control8%- Authentication and Authorization
  • 1. Multi-factor authentication
  • 2. Centralized authentication
  • 3. PAM
- Mandatory Access Control
  • 1. SELinux management
  • 2. AppArmor configuration
  • 3. Policy enforcement
- Discretionary Access Control
  • 1. File permissions
  • 2. POSIX ACLs
  • 3. Extended attributes
Topic 2: Cryptography8%- Data Encryption
  • 1. Encrypt files and storage devices
  • 2. Use LUKS and dm-crypt
  • 3. Secure data transmission
- OpenPGP
  • 1. Web of trust concepts
  • 2. Manage GnuPG keys
  • 3. Sign and encrypt data
- X.509 Certificates and Public Key Infrastructures
  • 1. Certificate revocation and validation
  • 2. Create and manage certificates
  • 3. Manage certificate authorities
Topic 3: Network Security12%- Network Hardening
  • 1. Secure network services
  • 2. TCP wrappers and service restrictions
- Packet Filtering
  • 1. iptables and ip6tables
  • 2. IP sets
  • 3. nftables awareness
  • 4. NAT and connection tracking
- Virtual Private Networks
  • 1. WireGuard
  • 2. OpenVPN
  • 3. IPsec and strongSwan
- Network Intrusion Detection
  • 1. Wireshark
  • 2. tcpdump
  • 3. Snort
  • 4. Kismet
Topic 4: Threats and Vulnerability Assessment3%- Threat Analysis
  • 1. Credential and confidentiality threats
  • 2. Network threats
  • 3. Host-based threats
  • 4. Application threats
- Vulnerability Assessment
  • 1. Security scanning
  • 2. Risk identification
  • 3. OpenVAS
Topic 5: Host Security9%- Host Hardening
  • 1. Kernel runtime protection
  • 2. Service hardening
  • 3. Secure boot process
- Resource Control
  • 1. ulimits
  • 2. cgroups
  • 3. Process resource management
- Host Intrusion Detection
  • 1. AIDE integrity checking
  • 2. Linux Audit system
  • 3. Malware detection
  • 4. Rootkit detection tools

Lpi LPIC Exam 303: Security, version 3.0 Sample Questions:

Question #1

What is the purpose of the Linux Audit system?

  • A. To manage installed packages
  • B. To manage system log files
  • C. To automate host scans
  • D. To detect intrusions and system changes
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Question #2

Which of the following statements are true regarding the certificate of a Root CA? (Choose THREE correct answers.)

  • A. It has an infinite lifetime and never expires.
  • B. It must contain a host name as the common name.
  • C. It must contain an X509v3 Authority extension.
  • D. It does not include the private key of the CA.
  • E. It is a self-signed certificate.
Reveal Solution  Discussion  0

Correct Answer: C,D,E  🗳️

Question #3

What is the primary purpose of Online Certificate Status Protocol (OCSP)?

  • A. To allow a client to check the revocation status of a specific X.509 certificate in real time.
  • B. To generate new X.509 certificates automatically.
  • C. To distribute the full Certificate Revocation List to all clients.
  • D. To encrypt data in transit between a client and server.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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Question #4

Which of the following commands adds a new user usera to FreeIPA?

  • A. idap- useradd -H Idaps://ipa-server CN=UserA --attribs "Firstname: User: Lastname: A"
  • B. ipa-admin create user --account usera --fname User --iname A
  • C. ipa user-add usera --first User --last A
  • D. ipa-user- add usera --name "User A"
  • E. useradd usera --directory ipa --gecos "User A"
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #5

Which of the following commands defines an audit rule that monitors read and write operations to the file/ etc/firewall/rules and associates the rule with the name firewall?

  • A. auditctl --read /etc/firewall/rules --write /etc/firewall/rules --label firewall
  • B. auditctl -w /etc/firewall/rules -p rw -k firewall
  • C. auditctl -N firewall -r r: /etc/firewall/rules -r w: etc/firewall/rules
  • D. auditctl -A -f /etc/firewall/rules -o r -o w -l firewall
  • E. echo "n: firewall r:/etc/firewall/rules: w:/etc/firewall/rules:" | auditctl ~
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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