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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: Aug 24, 2026

Q&A Number: 163 Q&As

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Lpi 303-300 Exam Syllabus Topics:

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

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

1. Which of the following commands makes the contents of the eCryptfs encrypted directory
~/Private available to the user?

A) ecryptfs-mount-private
B) decryptfs
C) ecryptfsclient
D) ecryptfs-manage-directory
E) ecryptfs.mount


2. In which path is the data, which can be altered by the sysctl command, accessible?

A) /proc/sys/
B) /dev/sys/
C) /sys/
D) /sysctl/


3. What is a plaintext?

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


4. What is the primary function of an Intrusion Detection System (IDS) such as Snort or Suricata operating in network-based mode?

A) To perform DNS resolution for network hosts.
B) To actively block malicious traffic before it reaches its destination.
C) To encrypt network traffic between hosts.
D) To passively monitor network traffic and generate alerts based on signature or anomaly-based detection rules.


5. In nftables, what is the purpose of a "base chain" as opposed to a "regular chain"?

A) A base chain is directly attached to a netfilter hook, such as input or forward, allowing it to receive packets from the kernel.
B) A base chain can only contain accept rules.
C) There is no functional difference between base and regular chains.
D) A base chain is used only for NAT rules.


Solutions:

Question # 1
Answer: A
Question # 2
Answer: A
Question # 3
Answer: D
Question # 4
Answer: D
Question # 5
Answer: A

303-300 Related Exams
303-300-JPN - LPIC Exam 303: Security, version 3.0 (303-300日本語版)
305-300J - LPIC-3 Exam 305: Virtualization and Containerization (305-300日本語版)
303-200 - 303-200: LPIC-3 Exam 303: Security, version 2.0
303-200J - 303-200: LPIC-3 Exam 303: Security, version 2.0 (303-200日本語版)
300-100J - LPIC-3 Exam 300: Mixed Environments, version 1.0 (300-100日本語版)
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