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Last Updated: Jul 29, 2026

No. of Questions: 163 Questions & Answers with Testing Engine

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Lpi 303-300 Exam Syllabus Topics:

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

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

1. Which command-line tool is commonly used to test and verify TLS/SSL configuration and certificate details of a remote server?

A) openssl s_client
B) ss -tlnp
C) tcpdump
D) nmap -sV


2. Linux Extended File Attributes are organized in namespaces. Which of the following names correspond to existing attribute namespaces?(Choose THREE correct answers.)

A) user
B) owner
C) default
D) trusted
E) system


3. Which of the following keywords are built-in chairs for the iptables nat table? (Choose THREE correct answers.)

A) PREROUTING
B) MASQUERADE
C) PROCESSING
D) POSTROUTING
E) OUTPUT


4. Which of the following command lines sets the administrator password for ntop to testing 123?

A) ntop --set-new-password=testing123
B) ntop --reset-password=testing123
C) ntop --set-admin-password=testing123
D) ntop --set-password=testing123


5. What is a rootkit?

A) A type of virus
B) A type of denial-of-service attack
C) A type of phishing scam
D) A type of malware that disguises itself as legitimate software


Solutions:

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

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