Learn As I Learn - Technology, Product and Cybersecurity

Akanksha Pathak
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  1. 4 NGÀY TRƯỚC

    Series 5: Ep 3: DNS Demystified

    Episode 3: DNS Demystified: Installing a DNS Server in Windows Server 2022 Description: Get fluent in DNS! This episode walks you through installing and configuring a DNS server on Windows Server 2022. You'll learn to set up zones, create host records (A, MX, CNAME), and prepare Kali Linux as a DNS client to test name resolution.

    15 phút

  2. 17 THG 2

    Series 5: Ep 1: Network Basics

    Episode 1: Network Basics: Hubs vs. Switches Explained Description: Understand the core of your network! This episode uses Packet Tracer to illustrate the fundamental differences between hub and switched networks. See how data flows, the impact on efficiency, and the security implications of each.

    8 phút

  3. 16 THG 2

    Series 5: Ep 2: Building Networks

    Episode 2: Building Networks: Designing and Subnetting IP Schemes Description: Become a network architect! Learn to design and subnet IP address schemes in a simulated environment using Packet Tracer. We'll configure IP addresses for PCs and routers across different subnets and verify connectivity, essential for scalable and secure networks.

    11 phút

  4. 10 THG 1

    Series 5 - Network & Vulnerability Deep Dives

    We'll cover: 1. Network Basics: Hubs vs. Switches 2. Building Networks: Designing andSubnetting IP Schemes Description 3.DNS Demystified: Installing a DNS Serverin Windows Server 2022 Description 4: DHCP Dynamics: Implementing a DHCP Serverin Windows Server 2022 Description 5: Firewall & Proxy Bypassing: Metasploitfor Web Recon Description 6: Firewall & Proxy Bypassing: Nikto forEvasion & Vulnerability Scanning Description 7: Vulnerability Assessment: Real-timeScanning with Nessus Description 8: Network Traffic Analysis: TCP/IP, UDP, andWireshark Flags Description 9: IDS/IPS Evasion & Deceptionstudy intruders. 10: Web Server Security: Architecture, AttackSurface & Hardening Description

    4 phút

  5. 3 THG 1

    Series 4: Ep 10: Locking It Down

    Episode 10: Locking It Down: Restricting User Accesswith File Permissions Description: Secure your sensitive data! Learn thecritical skill of restricting user access to folders using NTFS permissions inWindows Server 2022. We'll demonstrate creating new users, setting explicit"Deny" permissions, and verifying their effectiveness, highlightingthe importance of granular access control.

    8 phút

  6. 28/12/2025

    Series 4: Ep 9: Files & Formats

    Episode 9: Files & Formats: Working with FAT32 andNTFS Description: Demystify file systems! This episode guides youthrough creating and managing files in both FAT32 and NTFS formats on WindowsServer 2022. You'll learn how to format drives, perform file operations, verifyallocation, and configure advanced NTFS permissions for security.

    12 phút

  7. 08/11/2025

    Series 4: Ep 8: Memory Matters

    Dig deep into system memory! Learn how to illustrate the memory layout of a basic program and use advanced PowerShell commands (WMI, security-focused queries) todebug, check process integrity, detect DLL injections, and identify suspicious processes on Windows Server 2022. Commands: Get-Process | Where-Object { $_.ProcessName -eq "notepad" }Get-WmiObject -Class Win32_OperatingSystem | Select-Object TotalVisibleMemorySize, FreePhysicalMemoryGet-ProcessGet-WmiObject -Class Win32_Process | Select Name, ProcessId, ExecutablePath. For new powershell version simply use: Get-Process | Select-Object Name, Id, PathGet-WmiObject -Class Win32_Process | Select-Object Name, ProcessId, ParentProcessIdGet-WmiObject -Class Win32_Process -Filter "Name = 'notepad.exe'" | Select-Object ProcessId, Name, @{Name='Owner';Expression={$_.GetOwner().User}}Get-Process -Name notepad | Select-Object -ExpandProperty Modules | Select ModuleName, FileNameGet-WmiObject Win32_Process | Where-Object { $_.ExecutablePath -and ($_.ExecutablePath -notlike "C:\Windows\*" -and $_.ExecutablePath -notlike "C:\Program Files\*") } | Select Name, ProcessId, ExecutablePathGet-Process | Where-Object { $_.Modules.ModuleName -contains "ntdll.dll" }Get-WmiObject Win32_Process | Select-Object Name, ProcessId, CommandLineGet-Process | Sort-Object StartTime -Descending | Select-Object Name, Id, StartTime | Select-Object -First 10

    14 phút

  8. 31/10/2025

    Series 4: Ep 7: Debugging Your Code

    Don't let errors stop you! This episode focuses on practical debugging techniques for both PowerShell and Bash scripts. We'll intentionally introduce common errors (like typos or wrong parameters) and walk through how to identify and fix them, building crucial troubleshooting skills. Powershell Script: #Script to log multiple event IDs$BeginTime = (Get-Date).AddMinutes(-20)Get-EventLog -LogName "Securityy" -After $BeginTime |Where-Object { $_.EventID -in '4624', '4625'} |Select-Object TimeGenerated, EventID, Message |Format-Table -AutoSize |Out-Files C:\EventLogs_MultipleEvents.txt BASH Script: #!/bin/bash#VariablesUSERNAME="testuser" # User accountnamePASSWORD="P@ssw0rd" # User passwordGROUP="testgroup" # Custom groupnameSSH_DIR="/home/$USERNAME/.ssh"PUB_KEY="ssh-rsa AAAAB3...your-public-key... user@kali" #Step 1: Check ifuser already existsif id "$USERNAME" &>/dev/null; then  echo "Error: User '$USERNAME'already exists!"  exit 1fi #Step 2: Create userand set passwordecho "Creating user '$USERNAME'..."useradd -m -n -s /bin/bash "$USERNAME" # Error 1: -n is an invalidoptionif [ $? -ne 0 ]; then  echo "Error: Failed to create user'$USERNAME'"  exit 1fiecho "$USERNAME:$PASSWORD" | chpasswdecho "Password set for user '$USERNAME'." #Step 3: Add user tosudoersecho "Granting sudo access to '$USERNAME'..."usermod -aG sudo "$USERNAME"if [ $? -ne 0 ]; then  echo "Error: Failed to add'$USERNAME' to sudoers"  exit 1fi #Step 4: Createcustom group and add userecho "Creating group '$GROUP' and adding user..."groupadd "$GROUP" 2>/dev/nullusermod -aG "wronggroup" "$USERNAME" # Error 2:"wronggroup" does not existif [ $? -ne 0 ]; then  echo "Error: Failed to add'$USERNAME' to group '$GROUP'"  exit 1fi #Step 5: Setup SSHkey-based authenticationecho "Setting up SSH key-based authentication..."mkdir -p "$SSH_DIR"echo "$PUB_KEY" > "$SSH_DIR/authorized_keys"chmod 600 "$SSH_DIR/authorized_keys"chmod 700 "$SSH_DIR"chown -R "$USERNAME:$USERNAME" "$SSH_DIR"if [ $? -ne 0 ]; then  echo "Error: Failed to set up SSHkeys"  exit 1fiecho "SSH keys configured for '$USERNAME'." #Step 6: Setpassword expiry to 30 daysecho "Setting password expiry policy for '$USERNAME'..."chage -M 30 "$USERNAME"if [ $? -ne 0 ]; then  echo "Error: Failed to setpassword expiry"  exit 1fi #Step 7: Logactivity to/var/log/user_setup.logLOG_FILE="/var/log/user_setup.log"echo "$(date) - User '$USERNAME' created and configured" >>"$LOG_FILE"if [ $? -ne 0 ]; then  echo "Error: Failed to write logto $LOG_FILE"  exit 1fi #Step 8:Confirmation Messageecho "Testing SSH connection to '$USERNAME'@localhosts..."ssh "$USERNAME@localhost"if [ $? -ne 0 ]; thenecho "Error: SSH connection failed."exit 1fiecho "User '$USERNAME' created and configured successfully!"

    9 phút
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