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  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • No. of Questions: 163 Questions and Answers
  • Updated: Aug 02, 2026

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Lpi 303-300 Exam Syllabus Topics:

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

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

1. Which PAM module checks new passwords against dictionary words and enforces complexity?
(Specially the module name only without any path.)
Solution: pam_cracklib
Determine whether the given solution is correct?

A) Incorrect
B) Correct


2. Which command is used to set the owner and group of a file in Linux?

A) chmod
B) setfacl
C) chgrp
D) chown


3. Which of the following utilities is used to generate keys for DNSSEC?

A) dnssec-dsfromkey
B) delv
C) rndc
D) dnssec-keygen


4. Which of the following types can be specified within the Linux Audit system? (Choose THREE correct answers.)

A) File system rules
B) System call rules
C) Network connection rules
D) Control rules
E) Console rules


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

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