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

  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Aug 08, 2026
  • Q & A: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

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

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

1. Which of the following resources of a shell and its child processes can be controlled by the Bash build- in command ulimit? (Choose THREE correct answers.)

A) The maximum number of environment variables
B) The maximum size of written files
C) The maximum number of user processes
D) The maximum number of open file descriptors
E) The maximum number of newly created files


2. What is a ciphertext?

A) The original message before encryption
B) The key used to encrypt the message
C) The encrypted message
D) The algorithm used to encrypt the message


3. What is the purpose of an extended attribute in Linux?

A) To compress a file to save disk space
B) To encrypt a file for secure transmission
C) To mark a file as executable
D) To store additional metadata about a file


4. Which PAM module can be used to restrict login access based on the combination of user, origin, and service?

A) pam_nologin
B) pam_access
C) pam_limits
D) pam_selinux


5. Which command displays the capabilities currently assigned to a specific binary file?

A) getcap /path/to/binary
B) capsh --print
C) chmod +cap /path/to/binary
D) setcap /path/to/binary


Solutions:

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

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