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Lpi 303-300 Exam Syllabus Topics:

Section	Weight	Objectives
Access Control	8%	- Discretionary Access Control 1. File permissions 2. POSIX ACLs 3. Extended attributes - Mandatory Access Control 1. AppArmor configuration 2. Policy enforcement 3. SELinux management - Authentication and Authorization 1. PAM 2. Multi-factor authentication 3. Centralized authentication
Host Security	9%	- Resource Control 1. Process resource management 2. ulimits 3. cgroups - Host Intrusion Detection 1. Malware detection 2. Linux Audit system 3. AIDE integrity checking 4. Rootkit detection tools - Host Hardening 1. Service hardening 2. Secure boot process 3. Kernel runtime protection
Threats and Vulnerability Assessment	3%	- Threat Analysis 1. Network threats 2. Application threats 3. Credential and confidentiality threats 4. Host-based threats - Vulnerability Assessment 1. OpenVAS 2. Security scanning 3. Risk identification
Network Security	12%	- Virtual Private Networks 1. IPsec and strongSwan 2. WireGuard 3. OpenVPN - Network Hardening 1. TCP wrappers and service restrictions 2. Secure network services - Packet Filtering 1. IP sets 2. NAT and connection tracking 3. nftables awareness 4. iptables and ip6tables - Network Intrusion Detection 1. Snort 2. Kismet 3. tcpdump 4. Wireshark
Cryptography	8%	- X.509 Certificates and Public Key Infrastructures 1. Manage certificate authorities 2. Create and manage certificates 3. Certificate revocation and validation - OpenPGP 1. Manage GnuPG keys 2. Sign and encrypt data 3. Web of trust concepts - Data Encryption 1. Use LUKS and dm-crypt 2. Secure data transmission 3. Encrypt files and storage devices

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q137-Q142):

NEW QUESTION # 137
Which of the following commands adds a new user usera to FreeIPA?

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

Answer: C

NEW QUESTION # 138
What is the primary function of an Intrusion Detection System (IDS) such as Snort or Suricata operating in network-based mode?

A. To perform DNS resolution for network hosts.
B. To actively block malicious traffic before it reaches its destination.
C. To encrypt network traffic between hosts.
D. To passively monitor network traffic and generate alerts based on signature or anomaly-based detection rules.

Answer: D

Explanation:
A network-based Intrusion Detection System (NIDS), such as Snort or Suricata operating in IDS mode, passively monitors network traffic, typically via a mirrored switch port or network tap, and compares it against a set of signatures or behavioral rules to detect potential malicious activity, generating alerts for further investigation. This differs from an Intrusion Prevention System (IPS), which operates inline with the traffic path and can actively drop or block traffic matching a detection rule in real time, rather than only alerting after the fact.

NEW QUESTION # 139
In an AppArmor profile, what does the "complain" mode do?

A. It blocks all restricted actions and terminates the process.
B. It disables AppArmor for that specific profile only.
C. It automatically generates a new profile based on observed behavior.
D. It logs policy violations without enforcing restrictions, similar to SELinux permissive mode.

Answer: D

Explanation:
When an AppArmor profile is placed into complain mode, actions that would violate the profile's rules are logged but not blocked, allowing an administrator to observe an application's actual behavior before switching the profile to enforce mode. This is conceptually similar to SELinux's permissive mode. The aa-genprof and aa-logprof tools can process these complain-mode logs to help build or refine a profile, but complain mode itself does not automatically generate profiles.

NEW QUESTION # 140
Which command is used to set the permissions of a file in Linux?

A. chgrp
B. chown
C. chmod
D. setfacl

Answer: C

NEW QUESTION # 141
Which of the following are differences between AppArmor and SELinux?
(Choose TWO correct answers)

A. SELinux stores information in extended file attributes. AppArmor does not maintain file specific information and states.
B. The SELinux configuration is loaded at boot time and cannot be changed later on. AppArmor provides user space tools to change its behavior.
C. AppArmor is less complex and easier to configure than SELinux.
D. AppArmor is implemented in user space only. SELinux is a Linux Kernel Module.
E. AppArmor neither requires nor allows any specific configuration. SELinux must always be manually configured.

Answer: A,C

NEW QUESTION # 142
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