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Lpi 303-300 Exam Syllabus Topics:

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

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

1. What is a ciphertext?

A) The algorithm used to encrypt the message
B) The key used to encrypt the message
C) The encrypted message
D) The original message before encryption


2. Which of the following practices are important for the security of private keys? (Choose TWO correct answers.)

A) Private keys should be included in X509 certificates.
B) Private keys should be created on the systems where they will be used and should never leave them.
C) Private keys should have a sufficient length for the algorithm used for key generation.
D) Private keys should always be stored as plain text files without any encryption.
E) Private keys should be uploaded to public key servers.


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

A) To compress the VPN traffic.
B) To disable TLS entirely and use a static key instead.
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 generate the server's X.509 certificate automatically.


4. What is a Certificate Revocation List (CRL)?

A) A list of private keys that have been compromised
B) A list of X.509 certificates that have been revoked by a particular CA
C) A list of public keys that have been compromised
D) A list of X.509 certificates that have been issued by a particular CA


5. Which of the following stanzas is a valid client configuration for FreeRADIUS?

A) client private-network-1 {
ip = 192.0.2.0/24
secret = testing123-1
}
B) client private-network-1 {
ip = 192.0.2.0/24
passwd = testing123-1
}
C) client private-network-1 {
ipaddr = 192.0.2.0/24
password = testing123-1
}
D) client private-network-1 {
ipaddr = 192.0.2.0/24
secret = testing123-1
}
E) client private-network-1 {
ip = 192.0.2.0/24
password = testing123-1
}


Solutions:

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

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