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

  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Sep 22, 2026
  • Q&As: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Cryptography8%- OpenPGP
  • 1. Manage GnuPG keys
  • 2. Web of trust concepts
  • 3. Sign and encrypt data
- Data Encryption
  • 1. Encrypt files and storage devices
  • 2. Use LUKS and dm-crypt
  • 3. Secure data transmission
- X.509 Certificates and Public Key Infrastructures
  • 1. Manage certificate authorities
  • 2. Create and manage certificates
  • 3. Certificate revocation and validation
Topic 2: Host Security9%- Resource Control
  • 1. ulimits
  • 2. Process resource management
  • 3. cgroups
- Host Intrusion Detection
  • 1. Linux Audit system
  • 2. Rootkit detection tools
  • 3. Malware detection
  • 4. AIDE integrity checking
- Host Hardening
  • 1. Secure boot process
  • 2. Service hardening
  • 3. Kernel runtime protection
Topic 3: Access Control8%- Mandatory Access Control
  • 1. SELinux management
  • 2. Policy enforcement
  • 3. AppArmor configuration
- Authentication and Authorization
  • 1. Multi-factor authentication
  • 2. PAM
  • 3. Centralized authentication
- Discretionary Access Control
  • 1. File permissions
  • 2. Extended attributes
  • 3. POSIX ACLs
Topic 4: Threats and Vulnerability Assessment3%- Threat Analysis
  • 1. Host-based threats
  • 2. Network threats
  • 3. Application threats
  • 4. Credential and confidentiality threats
- Vulnerability Assessment
  • 1. OpenVAS
  • 2. Risk identification
  • 3. Security scanning
Topic 5: Network Security12%- Network Intrusion Detection
  • 1. tcpdump
  • 2. Wireshark
  • 3. Snort
  • 4. Kismet
- Packet Filtering
  • 1. iptables and ip6tables
  • 2. nftables awareness
  • 3. NAT and connection tracking
  • 4. IP sets
- Virtual Private Networks
  • 1. OpenVPN
  • 2. IPsec and strongSwan
  • 3. WireGuard
- Network Hardening
  • 1. Secure network services
  • 2. TCP wrappers and service restrictions

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

Question #1

What option of mount.cifs specifies the user that appears as the local owner of the files of a mounted CIFS share when the server does not provide ownership information? (Specify ONLY the option name without any values or parameters.) Solution: uid=arg Determine whether the given solution is correct?

  • A. Incorrect
  • B. Correct
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #2

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

  • A. Console rules
  • B. Control rules
  • C. File system rules
  • D. System call rules
  • E. Network connection rules
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Question #3

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
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #4

Which of the following commands changes the source IP address to 192.0.2.11 for all IPv4 packets which go through the network interface eth0?

  • A. iptables ~t mangle ~A POSTROUTING ~0 eth0 ~j SNAT -to~source 192.0.2.11
  • B. iptables ~t mangle ~A POSTROUTING ~i eth0 ~j SNAT -to~source 192.0.2.11
  • C. iptables ~t nat ~A PREROUTING ~i eth0 ~j SNAT --to~source 192.0.2.11
  • D. iptables ~t nat ~A POSTROUTING ~i eth0 ~j DNAT --to~source 192.0.2.11
  • E. iptables ~t nat ~A POSTROUTING ~o eth0 ~j SNAT --to~source 192.0.2.11
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

Question #5

Which mount option prevents the execution of binaries located on the mounted filesystem?

  • A. nosuid
  • B. nodev
  • C. noexec
  • D. ro
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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