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

  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Jul 31, 2026
  • Q&As: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Network Security12%- Virtual Private Networks
  • 1. OpenVPN
  • 2. WireGuard
  • 3. IPsec and strongSwan
- Packet Filtering
  • 1. NAT and connection tracking
  • 2. nftables awareness
  • 3. IP sets
  • 4. iptables and ip6tables
- Network Hardening
  • 1. TCP wrappers and service restrictions
  • 2. Secure network services
- Network Intrusion Detection
  • 1. tcpdump
  • 2. Wireshark
  • 3. Snort
  • 4. Kismet
Topic 2: Cryptography8%- OpenPGP
  • 1. Sign and encrypt data
  • 2. Web of trust concepts
  • 3. Manage GnuPG keys
- X.509 Certificates and Public Key Infrastructures
  • 1. Certificate revocation and validation
  • 2. Manage certificate authorities
  • 3. Create and manage certificates
- Data Encryption
  • 1. Use LUKS and dm-crypt
  • 2. Secure data transmission
  • 3. Encrypt files and storage devices
Topic 3: 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. Application threats
  • 4. Host-based threats
Topic 4: Host Security9%- Host Hardening
  • 1. Secure boot process
  • 2. Kernel runtime protection
  • 3. Service hardening
- Resource Control
  • 1. ulimits
  • 2. Process resource management
  • 3. cgroups
- Host Intrusion Detection
  • 1. Linux Audit system
  • 2. AIDE integrity checking
  • 3. Rootkit detection tools
  • 4. Malware detection
Topic 5: Access Control8%- Discretionary Access Control
  • 1. File permissions
  • 2. Extended attributes
  • 3. POSIX ACLs
- Authentication and Authorization
  • 1. PAM
  • 2. Centralized authentication
  • 3. Multi-factor authentication
- Mandatory Access Control
  • 1. AppArmor configuration
  • 2. SELinux management
  • 3. Policy enforcement

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

1. Which Linux kernel feature restricts a process's access to a subset of system calls, commonly used by container runtimes and sandboxing tools to reduce attack surface?

A) capabilities
B) seccomp
C) cgroups
D) namespaces


2. Which command is used to run a new shell for a user changing the SELinux context? (Specify ONLY the command without any path or parameters.) Solution: newrole Determine whether the given solution is correct?

A) Incorrect
B) Correct


3. What effect does the configuration SSLStrictSNIVHostCheck on have on an Apache HTTPD virtual host?

A) Despite its configuration, the virtual host is served only on the common name and Subject Alternative
B) The clients connecting to the virtual host must provide a client certificate that was issued by the same CA that issued the server's certificate.
C) All of the names of the virtual host must be within the same DNS zone.
D) The virtual host is served only to clients that support SNI.
E) The virtual host is used as a fallback default for all clients that do not support SNI.


4. What is the purpose of the program snort-stat?

A) It displays the status of all Snort processes.
B) It reports whether the Snort process is still running and processing packets.
C) It returns the status of all configured network devices.
D) It displays statistics from the running Snort process.
E) It reads syslog files containing Snort information and generates port scan statistics.


5. What is the primary function of an Intrusion Detection System (IDS) such as Snort or Suricata operating in network-based mode?

A) To actively block malicious traffic before it reaches its destination.
B) To passively monitor network traffic and generate alerts based on signature or anomaly-based detection rules.
C) To perform DNS resolution for network hosts.
D) To encrypt network traffic between hosts.


Solutions:

Question # 1
Answer: B
Question # 2
Answer: B
Question # 3
Answer: D
Question # 4
Answer: E
Question # 5
Answer: B

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