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

Lpi 303-300 exam
  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Jul 27, 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. NAT and connection tracking
  • 4. iptables and ip6tables
- Network Hardening
  • 1. TCP wrappers and service restrictions
  • 2. Secure network services
- Virtual Private Networks
  • 1. WireGuard
  • 2. OpenVPN
  • 3. IPsec and strongSwan
- Network Intrusion Detection
  • 1. tcpdump
  • 2. Snort
  • 3. Wireshark
  • 4. Kismet
Host Security9%- Resource Control
  • 1. ulimits
  • 2. cgroups
  • 3. Process resource management
- Host Intrusion Detection
  • 1. Malware detection
  • 2. AIDE integrity checking
  • 3. Rootkit detection tools
  • 4. Linux Audit system
- Host Hardening
  • 1. Kernel runtime protection
  • 2. Service hardening
  • 3. Secure boot process
Threats and Vulnerability Assessment3%- Vulnerability Assessment
  • 1. Security scanning
  • 2. OpenVAS
  • 3. Risk identification
- Threat Analysis
  • 1. Network threats
  • 2. Credential and confidentiality threats
  • 3. Host-based threats
  • 4. Application threats
Access Control8%- Mandatory Access Control
  • 1. Policy enforcement
  • 2. SELinux management
  • 3. AppArmor configuration
- Discretionary Access Control
  • 1. Extended attributes
  • 2. File permissions
  • 3. POSIX ACLs
- Authentication and Authorization
  • 1. Multi-factor authentication
  • 2. Centralized authentication
  • 3. PAM
Cryptography8%- OpenPGP
  • 1. Sign and encrypt data
  • 2. Manage GnuPG keys
  • 3. Web of trust concepts
- X.509 Certificates and Public Key Infrastructures
  • 1. Certificate revocation and validation
  • 2. Manage certificate authorities
  • 3. Create and manage certificates
- Data Encryption
  • 1. Secure data transmission
  • 2. Use LUKS and dm-crypt
  • 3. Encrypt files and storage devices

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


2. Which command displays currently listening TCP and UDP sockets along with the process ID and name of the associated program?

A) ss -tulnp
B) ping -c 4
C) traceroute
D) dig


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

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


4. In Suricata, what is the purpose of a "rule" file, such as those found in the emerging-threats.rules collection?

A) It defines user authentication policies for the Suricata management interface.
B) It configures which network interfaces Suricata should monitor.
C) It defines the signatures and conditions used to detect specific types of malicious or suspicious network traffic.
D) It defines firewall NAT translation rules.


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

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


Solutions:

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

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