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Lpi LPIC Exam 303: Security, version 3.0 : 303-300

303-300
  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Sep 06, 2026
  • Q & A: 163 Questions and Answers
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Lpi 303-300 Exam Syllabus Topics:

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

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

Question 1

What is the purpose of the "ausearch" command in relation to the Linux audit framework?

A. To generate summary reports of audit statistics.
B. To search and filter existing audit log entries based on criteria such as key, user, or time range.
C. To add new audit rules to the running kernel.
D. To restart the auditd service.


Question 2

Which of the following DNS records are used in DNSSEC?

A. PTR
B. TXT
C. MX
D. RRSIG


Question 3

Which of the following expressions are valid AIDE rules? (Choose TWO correct answers.)

A. append: /var/log/*
B. /usr=all
C. /etc p+i+u+g
D. #/bin/
E. !/var/run/.*


Question 4

Which tool can be used to check for rootkits on a Linux system?

A. chkrootkit
B. AIDE
C. rpm
D. OpenSCAP


Question 5

What is social engineering?

A. A type of denial-of-service attack
B. A type of attack that exploits human psychology to gain access to sensitive information
C. A type of malware that disguises itself as legitimate software
D. A type of virus


Solutions:

Question 1
Answer: B
Question 2
Answer: D
Question 3
Answer: C,E
Question 4
Answer: A
Question 5
Answer: B

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