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 31, 2026     Q & A: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

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

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

Question 1

Which of the following components are part of FreeIPA? (Choose THREE correct answers.)

A. Intrusion Detection System
B. DHCP Server
C. Directory Server
D. Kerberos KDC
E. Public Key Infrastructure


Question 2

What happens when the command getfattr afile is run while the file afile has no extended attributes set?

A. No output is produced and getfattr exits with a value of 0.
B. getfattr prints a warning and exits with a value of 1.
C. No outputs is produced and getfattr exits with a value of 1.
D. getfattr prints a warning and exits with a values of 0.


Question 3

What is the purpose of the OpenVPN "tls-auth" or "tls-crypt" directive?

A. To generate the server's X.509 certificate automatically.
B. To compress the VPN traffic.
C. To add an additional layer of HMAC authentication (or full encryption, with tls-crypt) to the TLS control channel, protecting against certain DoS and port-scanning attacks.
D. To disable TLS entirely and use a static key instead.


Question 4

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. Correct
B. Incorrect


Question 5

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

A. All of the names of the virtual host must be within the same DNS zone.
B. The virtual host is served only to clients that support SNI.
C. Despite its configuration, the virtual host is served only on the common name and Subject Alternative
D. The virtual host is used as a fallback default for all clients that do not support SNI.
E. 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.


Solutions:

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

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