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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 12, 2026

Q & A: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

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

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

1. Which option in an Apache HTTPD configuration file enables OCSP stapling? (Specify ONLY the option name without any values or parameters.) Solution: httpd-ssl.conf Determine whether the given solution is correct?

A) Correct
B) Incorrect


2. Which nftables command displays the currently active ruleset, including all tables, chains, and rules?

A) nft show tables
B) nft get rules
C) nft list ruleset
D) nft dump chains


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

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


4. Which of the following DNS records is used to map an IP address to a hostname?

A) PTR
B) SOA
C) NS
D) A


5. Which directive is used in an OpenVPN server configuration in order to send network configuration information to the client? (Specify ONLY the option name without any values or parameters.) Solution: push Determine whether the given solution is correct?

A) Correct
B) Incorrect


Solutions:

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

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