Lpi LPIC Exam 303: Security, version 3.0 : 303-300

  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Sep 03, 2026
  • Q & A: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

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

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

Question 1

Which of the following openssl commands generates a certificate signing request (CSR) using the already existing private key contained in the file private/ keypair.pem?

A. openssl req -key private/keypair.pem -out req/csr.pem
B. openssl gencsr -key private/keypair.pem -out req/csr.pem
C. openssl gencsr -new- key private/keypair.pem -out req/csr.pem
D. openssl req - new -key private/keypair.pem -out req/csr.pem


Question 2

Which SELinux mode logs policy violations without actually enforcing the policy?

A. Permissive
B. Enforcing
C. Targeted
D. Disabled


Question 3

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. Incorrect
B. Correct


Question 4

Which of the following is an example of a behavioral-based HID technique?

A. Heuristic-based detection
B. Rule-based detection
C. Anomaly-based detection
D. Signature-based detection


Question 5

Which of the following statements describes the purpose of ndpmon?

A. It monitors the availability of a network link by querying network interfaces.
B. It monitors log files for failed login attempts in order to block traffic from offending network nodes.
C. It monitors the network for neighbor discovery messages from new IPv6 hosts and routers.
D. It monitors remote hosts by periodically sending echo requests to them.
E. It monitors the network for IPv4 nodes that have not yet migrated to IPv6.


Solutions:

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

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