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

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

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

1. Which of the following commands makes the contents of the eCryptfs encrypted directory
~/Private available to the user?

A) ecryptfs.mount
B) ecryptfs-manage-directory
C) decryptfs
D) ecryptfsclient
E) ecryptfs-mount-private


2. Which of the following commands adds a new user usera to FreeIPA?

A) useradd usera --directory ipa --gecos "User A"
B) idap- useradd -H Idaps://ipa-server CN=UserA --attribs "Firstname: User: Lastname: A"
C) ipa-admin create user --account usera --fname User --iname A
D) ipa-user- add usera --name "User A"
E) ipa user-add usera --first User --last A


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

A) Network connection rules
B) Console rules
C) Control rules
D) System call rules
E) File system rules


4. Which file is used to configure rkhunter?

A) /etc/rkhunter.conf
B) /etc/audit/auditd.conf
C) /etc/maldet.conf
D) /etc/aide/aide.conf


5. Which of the following configuration options makes Apache HTTPD require a client certificate for authentication?

A) SSLRequestClientCert always
B) SSLPolicy valid-client-cert
C) Require valid-x509
D) Limit valid-x509
E) SSLVerifyClient require


Solutions:

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

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