After the course you can secure Linux systems and the networks between them to the standard LPIC-3 Security expects. You run your own PKI, encrypt file systems, use DNSSEC, harden hosts, control access with mandatory access control, detect attacks with intrusion detection and set up VPNs. You work through the exam objective topics in lab exercises. The course suits experienced Linux administrators and security engineers with LPIC-2 knowledge who are preparing for exam 303-300.
What you’ll take away.
- Run your own PKI and use X.509 certificates for encryption, signing and authentication
- Encrypt file systems and secure DNS with DNSSEC
- Harden hosts, limit resources and detect attacks with intrusion detection
- Control access with discretionary and mandatory access control
- Protect networks with packet filtering and VPNs and test for vulnerabilities
Your training in detail
- Who is it for?
- Experienced Linux administrators, security engineers and operations teams who secure servers and networks in larger environments and are working towards LPIC-3.
- Prerequisites
- Confident Linux administration at LPIC-2 level. For the certification, LPI requires an active LPIC-2 certification.
- Format & planning
- Standard length: 5 training days. A different length can be arranged for companies.
Agenda: from understanding to application
Our independently developed agenda proposal. Focus areas, lab environment and scope are agreed before booking.
Cryptography: X.509, PKI and certificates in use
Encrypted file systems and DNS with cryptography
Host security: hardening, host intrusion detection, resource control
Access control: DAC and mandatory access control
Network security: hardening, network intrusion detection, packet filtering
Virtual private networks
Threats, vulnerabilities and penetration testing; exam practice
In a lab you set up a small CA, secure a web service with your own certificates, enable a MAC policy for the service and link two sites by VPN. You then check your setup with a vulnerability scan.
Exams, licences & credentials
The course prepares you for exam 303-300 for the Linux Professional Institute's LPIC-3 Security: 60 multiple-choice and fill-in-the-blank questions in 90 minutes. The exam and its fees are included only if the offer confirms this explicitly. The certification is awarded by LPI and requires an active LPIC-2 certification. This is an official LPI course only if the offer says so explicitly.
Vendor references & review date
Sources checked on 2026-11-10. These sources describe the technology or external exam requirements. They do not imply a partnership with NextNowa.
Your learning content
These objectives describe the training topic. The specific syllabus, dates and trainer are agreed before booking; the written offer is binding.
Frequently asked questions
Do I need LPIC-2 for LPIC-3 Security?
Yes. LPI awards LPIC-3 Security only if you hold an active LPIC-2 certification.
How long is the certification valid?
According to LPI, five years, with options to extend it.
Does LPIC-3 Security (303-300): securing Linux at enterprise level include a certificate?
The course prepares you for exam 303-300 for the Linux Professional Institute's LPIC-3 Security: 60 multiple-choice and fill-in-the-blank questions in 90 minutes. The exam and its fees are included only if the offer confirms this explicitly. The certification is awarded by LPI and requires an active LPIC-2 certification. This is an official LPI course only if the offer says so explicitly.