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Exam Information
Official specifications published by LPI
Exam Format
90 min
60
500
Expert
Registration
$200 USD
Pearson VUE or online proctoring
English, Japanese
No waiting period for first retake, 7 days for subsequent retakes
Validity
5 years
Pass any current LPIC-3 exam; Accumulate 120 PDUs through approved activities; Pass a higher-level LPI certification exam
303-300 Exam Topics and Domains
303-300 is organized into 5 weighted domains. Expect to work with iptables, nftables, OpenSSL, systemd, and more.
1
Cryptography
28.33%
X.509 Certificates and Public Key Infrastructures
Understanding X.509 Certificates
- Understand X.509 certificates and public key infrastructures
- Configure and use OpenSSL to implement certification authorities
- Issue SSL certificates for various purposes
X.509 Certificates for Encryption, Signing and Authentication
Certificate Usage for Security
- Configure Apache HTTPD with mod_ssl for HTTPS services
- Implement certificate-based authentication
- Configure OCSP stapling
- Use OpenSSL for SSL/TLS testing
Encrypted File Systems
Filesystem Encryption
- Setup and configure encrypted file systems
- Use dm-crypt with LUKS for block device encryption
- Implement eCryptfs for file system encryption
- Configure PAM integration for encrypted home directories
- Understand Clevis for automated LUKS unlocking
DNS and Cryptography
DNSSEC and Secure DNS
- Configure BIND as a DNSSEC-validating recursive name server
- Understand and implement CAA and DANE
- Use TSIG for secure BIND communication
- Awareness of modern DNS security protocols
2
Host Security
21.67%
Host Hardening
System Hardening
- Secure computers running Linux against common threats
- Implement security baselines
- Configure kernel security parameters
- Remove unnecessary services and packages
Host Intrusion Detection
Intrusion Detection Systems
- Configure and use common host intrusion detection software
- Manage the Linux Audit system
- Verify system integrity
- Analyze logs for security incidents
Resource Control
Resource Limitations
- Restrict resources that services and programs can consume
- Configure system resource limits
- Implement cgroups for resource control
- Set up process accounting
3
Access Control
13.33%
Discretionary Access Control
DAC Implementation
- Understand and manage file ownership and permissions
- Configure and manage access control lists
- Work with extended attributes and attribute classes
Mandatory Access Control
MAC Systems
- Understand TE, RBAC, MAC and DAC concepts
- Configure, manage and use SELinux
- Be aware of AppArmor and Smack
4
Network Security
28.33%
Network Hardening
Network Security Configuration
- Secure networks against common threats
- Verify effectiveness of security measures
- Configure network hardening parameters
Network Intrusion Detection
Network IDS Implementation
- Configure network intrusion detection systems
- Analyze network traffic for security issues
- Manage IDS rules and alerts
Packet Filtering
Firewall Configuration
- Configure packet filtering firewalls
- Implement NAT and masquerading
- Set up connection tracking
- Configure DDoS protection
Virtual Private Networks
VPN Implementation
- Configure and manage VPN solutions
- Implement site-to-site and remote access VPNs
- Troubleshoot VPN connectivity issues
5
Threats and Vulnerability Assessment
8.33%
Common Security Vulnerabilities and Threats
Security Vulnerabilities
- Understand common security vulnerabilities
- Identify potential threats
- Implement mitigation strategies
Penetration Testing
Security Testing
- Perform basic penetration testing
- Use vulnerability scanning tools
- Document security findings
- Understand ethical considerations
How do I earn this certification?
Passing 303-300 earns the LPIC-3 Security certification. It sits in the Linux Professional track.
Current Level Exams
- 300-300 - Mixed Environment
- 304-300 - Virtualization and High Availability
- 305-300 - Virtualization and Containerization
- 306-300 - High Availability and Storage Clusters
Next Level Options
- Multiple LPIC-3 Specializations Earn additional LPIC-3 specializations
- 701-100 - LPI DevOps Tools EngineerDevOps and automation focus
- 702-100 - LPI BSD SpecialistBSD systems expertise
Alternative Paths
- 304-300 - Virtualization and High Availability Complementary infrastructure skills
- 305-300 - Virtualization and ContainerizationContainer security expertise
- EX415 - Red Hat Certified Specialist in SecurityVendor-specific Linux security
- SY0-701 - CompTIA Security+Broader security foundation
- CISSP Enterprise security management
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for 303-300 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
Current Status
- ACTIVE
- Last content update: 2022-04-04
- Announcement date: 2022-01-15
Updates
- WireGuard 1.0+ Basic awareness added to VPN objectives • Release date: 2020-03-29
- systemd security features 250+ Enhanced resource control and sandboxing • Release date: 2024-01-01
- eBPF for security kernel 5.0+ Future consideration for host security monitoring • Release date: 2019-03-03
Who should take this exam?
Certification: LPIC-2; Status: Must be active; Note: LPIC-2 certification must be active to receive LPIC-3
- 3-5 years of Linux administration experience
- Enterprise-level security experience
- Familiarity with security frameworks and compliance