Internet Protocol Version 4 Implementation

• Network - Visio Drawing - Topology Overview
  • Explore classroom environment
  • Discuss the protocols used
  • Identify key infrastructure devices
  • Explain network topology - Visio
  • Discuss the IPv4 RFC-1918 Intranet & DMZ configuration
•  
• Open Systems Interconnect (OSI) & TCP/IP|DOD Networking Models
  • Discuss the OSI model
  • Identify key IP-related services at various layers of the OSI model
  • Explain Protocol Data Unit (PDU) framing at various OSI levels
  • Discuss the DOD model
  • Correlate TCP/IP|DOD model to the OSI model
  • Identify and discuss key IPv4 layers of both networking models
•  
• IPv4 Characteristics
  • Discuss the history of IPv4
  • Explain the flow of traffic in a typical IPv4 environment
  • Explain IPv4 multiplexing
  • Explore IPv4 packet structure
  • Use WireShark to decode IPv4 packets
•  
• Address Resolution Protocol (ARP)
  • Discuss the utility of ARP
  • Discuss Layer-2 networking
  • Generate ARP request/response pairs
  • Examine ARP request/response pairs using WireShark
  • Broadcast/Unicast discussion
•  
• IPv4 Packet Structure
  • Generate and analyze typical IPv4 packets
  • Discuss IP datagrams and packets
  • Compare and contrast packets
  • Discuss MTUs and fragmentation
  • Generate standard and fragmented packets
  • Explore packets using WireShark
•  
• IPv4 Address Space
  • Explain bit range of IPv4 addresses
  • Examine specific addresses and discuss
  • Discuss networking rules related to IPv4
  • Relate IPv4 addresses to classroom topology
•  
• Subnet Mask
  • Examine common subnet mask configurations
  • Explain the purpose of subnet masks
  • Apply concepts to classroom topology
•  
• Subnetting
  • Discuss benefits
  • Explain subnetting rules
  • Subnet classroom topology
  • Subnet other common network prefixes
•  
• TCP Packet Structure
  • Enumerate typical TCP header fields
  • Explain TCP multiplexing
  • Discuss sockets
  • Explore TCP segmentation
    
  • Generate TCP packets
  • Analyze TCP packets using WireShark
  • Compare and contrast TCP packets
•  
• UDP Packet Structure
  • Discuss benefits of UDP
  • Generate UDP traffic
  • Explore typical UDP packet structure
•  
• ICMP Packet Structure
  • Discuss benefits of ICMP
  • Generate ICMP traffic using common tools
  • Intercept and process ICMP traffic using WireShark
  • Peruse ICMP packets
  • Compare and contrast ICMP traffic
•  
• IPv4 Routing Headers
  • Discuss router modifications to traffic
  • Consider Layer-2 implications
  • Generate routed traffic into DMZ
  • Intercept with WireShark and explore modifications across routed interfaces
  • Contrast routed packets to non-routed packets
•  
• Subnet Resize
  • Discuss applicability and set the configuration scenario
  • Shift hosts between subnets and attempt communications
  • Discuss successes and failures
  • Resize subnets to accommodate shifts in narrower scopes
  • Examine communication results
•  
• Subnet Migration
  • Discuss reasons for network renumbering
  • Migrate from existing production subnet to a newly-numbered subnet
  • Maintain dual subnet routing after migration for backwards compatibility
  • Test subnet migration using before-and-after numbering schemes
  • Evaluate results
•  

CentOS9x Stream Administration

• Initial Environment
• ls, pwd, cd, cp, mv, rm, mkdir, rmdir, whoami
• alias, cat, file, chmod, chown, history
• STD(IN|OUT), Pipes, Redirection, Command Chaining
• ps, df, top, free
• Pagers, W-Commands
• Checksums
• Awk | Sed | Grep Usage
• BASH SHELL Environment
• Compression | Archival Tools
• SSH Equivalence
• SHELL Quoting
• Propagate Environment
• Secure Clients

• Identify Standard File Types
• Standard File Permissions
• Symbolic Links
• Transfer Permissions

• Identify SWAP environment
• Provision dedicated SWAP partitions
• Add | Remove SWAP from pool as needed
• Provision File System-based SWAP
• SWAP Share
• SWAP Persistence
• Identify default storage configuration
• Provision new storage as needed
• XFS - File System
• XFS - Grow File System
• Identify LVM defaults
• Add new partitions to LVM management
• Allocate storage to LVM Volume Groups
• Create Logical Volumes (LVs) as needed
• Overlay File System and mount where applicables
• LVM - Resize
• LVM - Mixed FS
• LVM - SWAP

• Features
• Install
• Defaults
• General Usage
• Update Accounts

• Defaults
• Shared PASS Gen
• Unique PASS Gen
• Encrypted PASS Gen
• Update Accounts
• Groups

• Discuss features | limitations
• Identify default system-wide schedule
• Peruse various default Cron Jobs
• Schedule simple job and monitor recurrence
• Evaluate results

• Peruse Default CONF
• Discuss Syslog Rules
• Explore Log Rotate defaults
• Ensure rotated logs are compressed
• Extend default retention scheme
• Force Log Rotation as needed

• Explore Default environment
• Install PKGs
• Dump important metadata from packages
• Apply Updates

• Default CONF
• Add | Confirm IPs as needed

• Install
• Copy Configuration
• SELinux - Confirm
• TLS | SSL Services
• cURL Client Tests
• Virtual Hosts
• ENC Sites Only

• SFTP Only USER
• SFTP Only USER - NOLOGIN
• SFTP Only Group - Control
• NMap Intro

SysLOG with rSysLogD

• Discuss Features
• Default Environment
• Kernel Firewall LOG
• Split LOGs by Priorities
• UDP | TCP Logging
• Dual L4 Logging
• Multiple Hosts
• Basic Queueing
• Reliable Event Logging Protocol (RELP)
• RELP - Remote Only
• RELP Only
• Traditional to RELP
• SysLOG Clear-Text - Confirm
• Property Filters
• Expression Filters
• Relay Chain

Netfilter Tables

• Features
• SSHGuard
• Ruleset Basics
• Persistence
• Sample Rules
• Inbound Filtering
• Dormant Table
• Manage Tables | Chains | Rules
• Counters
• Sets
• LOG Basics
• LOG with Sets
• Closed-Port LOGs
• LOG Options
• Re-Route LOGs
• Jump Targets
• Chain Jumping
• GoTo Chains
• Meta Selectors

Debian 12x Administration

• Features
• Download
• Graphical Install
• Text Install
• Post-Install Tweaks

• Explore usage of the following useful commands
• tty | /dev/pts | w | whoami | who
• set | env | export | unset
• cat | echo | touch | rm
• pwd | ls | cd | mkdir | alias | umask
• head | tail
• dd
• find
• history
• STDIN, STDOUT, STDERR, UNIX Pipes, Redirection, Command Chaining
• ps, df, free, top, dd
• stat, which, w, who
• tar | gzip | bzip2 | xz
• ZSH Setup

• Network Tools | IP Configuration
• Examine default IP configuration
• Extend IP configuration to facilitate additional addresses
• Static IP Config
• Dual: Dynamic | Static Config
• Multiple Interfaces
• Dual Network Services
• Confirm communications

PHP One-Liners

• General Usage
• Count Lines
• Word Count
• Count Chars
• Split Lines into ARRAY
• Count Instances of Fields
• Transform Delimiters
• Anonymize LOGs
• Extract Unique SRCs
• Lines by Error Code
• LOG By Code
• Summarize Error Codes
• Pre-Seed Error Codes
• Random Strings
• Varied Passwords
• Expose Undefined Passwords
• Outdated Passwords
• Hash | Un-Hash

Cloud Storage with GlusterFS

• Discuss Features:
• Default Volume Type
• Common Volume Types
• Transport Types
• File System Support
• Storage Model

• Features
• Provision Storage
• Allocate GlusterFS Brick
• Persistence
• Generate IO
• Multiple File Systems
• Various Sizes
• Stop | Remove Volume
• Reconstitute Volume
• Server Mount
• Evaluate

OpenPGP with GPG

• Discuss Features:
• Primary Tool
• Private | Public Keys
• Public Key Cryptography Standards (PKCS)
• Encryption | Decryption
• Signing | Verification

• Features
• General Usage
• Create Content
• Encrypt
• PassPhrase Protect
• Binary | Text Encryption
• Share
• Decrypt

SSL-TLS with OpenSSL

• Discuss Features:
• Primary Tool
• Private | Public Keys
• Certificate Signing Requests (CSRs)
• Self-Signed Certificates
• Public Key Cryptography Standards (PKCS)
• Encryption | Decryption
• Random String Generation
• Message Digests
• SSL-TLS Client

• Features
• General Usage
• Retrieve Site Certificates
• Determine OCSP Configuration
• Probe supported TLS Versions
• Extract Certificate for local usage
• Retrieve Certificate with NMap
• Retrieve Certificate Chain

• Discuss
• Generate Private Keys
• Generate Correlating CSRs
• Confirm Keys | CSRs
• Self-Signed Certificates

SSH Variables

• Discuss Features
• Bare VARs
• SSH Client
• Double Quotes
• Single Quotes
• SSH Environment

SHELL Variables

• Discuss Features
• Terminal (TTY)
• CLI Arguments
• Process ID
• Backgrounded
• SHELL Local
• Environment
• Persistence
• Aliases
• Command Substitution
• Increment | Decrement
• Dynamism

zsync

• Discuss Features
• Prep Content
• Compression
• File Names