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303-300
  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Sep 09, 2026
  • No. of Questions: 163 Questions and Answers
  • Download Limit: Unlimited
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Lpi 303-300 Exam Syllabus Topics:

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

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

Question 1

Which PAM module is used to enforce password complexity requirements, such as minimum length and character class requirements?

A. pam_access
B. pam_unix
C. pam_limits
D. pam_cracklib or pam_pwquality


Question 2

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

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


Question 3

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

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


Question 4

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

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


Question 5

Which strongSwan configuration file typically defines the connection definitions, including the local and remote endpoints and authentication method for an IPsec VPN?

A. /etc/ipsec.conf
B. /etc/ipsec.d/certs
C. /etc/strongswan.conf
D. /etc/ipsec.secrets


Solutions:

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

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