LinuxCBT Basic Security Edition encompasses: 1. Security Basics (fundamentals)

LinuxCBT Basic Security Edition is unparalleled in content, depth and expertise. It entails 10-hours, or over 1-day of classroom training. LinuxCBT Basic Security Edition prepares you or your organization for successfully securing GNU/Linux & Open Source-based solutions. As a by-product, many of the covered concepts, utilities and tricks are applicable to heterogeneous computing environments, ensuring your coverage of the fundamentals of securing corporate infrastructures.

Let LinuxCBT Basic Security Edition cost-effectively sharpen your GNU/Linux & Open Source Security skills!

Recommended Prerequisites for:

• Any LinuxCBT Operating System Course (Classic/EL-4/SUSE/Debian Editions)
  • Open mind & determination to master Linux and related open-source applications
  • Basic understanding of networking concepts
  • Access to a PC to follow the exercises

Basic Security - Module 1

• Boot Security
  • Explore Dell PowerEdge BIOS Security-related features
  • Discuss concepts & improve Dell PowerEdge BIOS security
  • Explain run-time boot loader vulnerabilities
  • Explore single-user mode (rootshell) and its inherent problems
  • Modify default GRUB startup options & examine results
  • Secure boot loader using MD5 hash
  • Identify key startup-related configuration files & define boot security measures
  • Identify key boot-related utilities
  • Confirm expected hardware configuration
  • Discuss INIT process, runlevel configuration & concepts
  • Explore & tighten the security of the INIT configuration
• Shell Security
  • Confirm expected applications
  • Discuss Teletype Terminals (TTYs) and Pseudo Terminals (PTS)
  • Identify common TTYs and PTSs
  • Track current TTYs and PTSs - character devices
  • Discuss concepts related to privileged and non-privileged use
  • Restrict privileged login
  • Use SSH and discuss TTYs
  • Discuss the importance of consistent system-wide banners & messages
  • Define and configure system banners for pre and post-system-access
  • Identify user-logon history and correlate to TTYs
  • Identify current user-connections - console-based and network-based
  • Use lsof to identify open files and sockets
• Syslog Security
  • Discuss Syslog concepts and applications
  • Explain Syslog semantics - facilities & levels - message handling & routing
  • Focus on security-related Syslog facilities
  • Examine security logs managed by Syslog
  • Configure Network Time Protocol (NTP) on interesting hosts
  • Secure NTP configuration
  • Ensure time consistency to preserve log-integrity
  • Configure Syslog replication to preserve log-integrity
  • Identify log discrepancies between Syslog hosts
• Reconnaissance & Vulnerability Assessment Tools
  • Discuss Stage-1 host/network attack concepts
  • Upgrade NMAP reconnaissance tool to increase effectiveness
  • Identify NMAP files
  • Discuss TCP handshake procedure
  • Discuss half-open/SYN connections
  • Perform connect and SYN-based host/network reconnaissance
  • Identify potential vulnerabilities on interesting hosts derived from reconnaissance
  • Examine NMAP logging capabilities
  • Perform port sweeps to identify common vulnerabilities across exposed systems
  • Secure exposed daemons/services
  • Perform follow-up audit to ensure security policy compliance
  • Discuss vulnerability scanner capabilities and applications
  • Prepare system for Nessus vulnerability scanner installation - identify/install dependencies
  • Generate self-signed SSL/TLS certificates for secure client/server communications
  • Activate Nessus subscription, server and client components
  • Explore vulnerability scanner interface and features
  • Perform network-based reconnaissance attack to determine vulnerabilities
  • Examine results of the reconnaissance attack and archive results
  • Secure exposed vulnerabilities
• XINETD - TCPWrappers - Chattr - Lsattr - TCPDump - Clear Text Daemons
  • Install Telnet Daemon
  • Install Very Secure FTP Daemon (VSFTPD)
  • Explore XINETD configuration and explain directives
  • Configure XINETD to restrict communications at layer-3 and layer-4
  • Restrict access to XINETD-protected daemons/services based on time range
  • Examine XINETD logging via Syslog
  • Discuss TCPWrappers security concepts & applications
  • Enhance Telnetd security with TCPWrappers
  • Confirm XINETD & TCPWrappers security
  • Discuss chattr applications & usage
  • Identify & flag key files as immutable to deter modifcation
  • Confirm extended attributes (XATTRs)
  • Discuss TCPDump applications & usage
  • Configure TCPDump to intercept Telnet & FTP - clear-text traffic
  • Use Ethereal to examine & reconstruct captured clear-text traffic
• Secure Shell (SSH) & MD5SUM Applications
  • Use Ethereal to examine SSH streams
  • Generate RSA/DSA PKI usage keys
  • Configure Public Key Infrastructure (PKI) based authentication
  • Secure PKI authentication files
  • Use SCP to transfer files securely in non-interactive mode
  • Use SFTP to transfer files securely in interactive mode
  • Configure SSH to support a pseudo-VPN using SSH-Tunnelling
  • Discuss MD5SUM concepts and applications
  • Compare & contrast modified files using MD5SUM
  • Use MD5SUM to verify the integrity of downloaded files
• GNU Privacy Guard (GPG) - Pretty Good Privacy (PGP) Compatible - PKI
  • Discuss GPG concepts & applications - symmetric/asymmetric encryption
  • Generate asymmetric RSA/DSA GPG/PGP usage keys - for multiple users
  • Create a local web of trust
  • Perform encrypts/decrypts and test data-exchanges
  • Sign encrypted content and verify signatures @ recipient
  • Import & export public keys for usage
  • Use GPG/PGP with Mutt Mail User Agent (MUA)
• AIDE File Integrity Implementation
  • Discuss file-integrity checker concepts & applications
  • Identify online repository & download AIDE
  • Install AIDE on interesting hosts
  • Configure AIDE to protect key files & directories
  • Alter file system objects and confirm modifications using AIDE
  • Audit the file system using AIDE
• Rootkits
  • Discuss rootkits concepts & applications
  • Describe privilege elevation techniques
  • Obtain & install T0rnkit - rootkit
  • Identify system changes due to the rootkit
  • Implement T0rnkit with AIDE to identify compromised system objects
  • Implement T0rnkit with chkrootkit to identify rootkits
  • T0rnkit - rootkit - cleanup
  • Implement N-DU rootkit
  • Evaluate system changes
• Bastille Linux - OS-Hardening
  • Discuss Bastille Linux system hardening capabilities
  • Obtain Bastille Linux & perform a system assessment
  • Install Bastille Linux
  • Evaluate hardened system components
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