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3ls3if/README.md

👋 Hi, I'm Rohan Das

🚀 Microsoft 365 Administrator | Windows Infrastructure Engineer | PowerShell Automation

💼 About Me

I'm a System Administrator with experience in Microsoft 365, Windows Server Infrastructure, PowerShell Automation, and Enterprise Security.

I enjoy designing, securing, automating, and troubleshooting enterprise IT environments while continuously learning modern cloud and infrastructure technologies.

🚀 Core Skills

☁️ Microsoft 365

  • Microsoft 365 Administration
  • Exchange Online
  • Microsoft Teams
  • SharePoint Online
  • OneDrive for Business
  • Microsoft Entra ID
  • Microsoft Intune (MDM & MAM)
  • Microsoft Purview
  • Microsoft Graph API
  • Azure AD Connect
  • Exchange Hybrid
  • Mail & Tenant Migration

🖥 Windows Infrastructure

  • Windows Server 2016 / 2019 / 2022 / 2025
  • Active Directory Domain Services
  • Group Policy
  • DNS
  • DHCP
  • AD CS
  • AD FS
  • IIS
  • WDS
  • Windows Administration
  • Server Performance Tuning
  • Failover Troubleshooting

🔐 Security Tools

  • Microsoft Defender
  • Sophos Intercept X
  • CrowdStrike Falcon
  • Wazuh SIEM
  • FortiGate Firewall
  • MFA
  • Conditional Access
  • Security Hardening
  • Vulnerability Assessment
  • Incident Response
  • Email Security
  • Endpoint Protection

🌐 Networking

  • TCP/IP
  • Routing & Switching
  • Cisco Catalyst
  • Cisco ISR
  • VLAN
  • VPN
  • DNS
  • SPF
  • DKIM
  • DMARC
  • Wireshark
  • Network Troubleshooting

🛡 Cybersecurity

Microsoft Security

  • Microsoft Defender for Endpoint
  • Microsoft Defender for Office 365
  • Microsoft Entra ID
  • Conditional Access
  • Multi-Factor Authentication
  • Microsoft Intune
  • Microsoft Purview
  • Exchange Online Protection
  • Microsoft Secure Score

Endpoint Security

  • Sophos Intercept X
  • Sophos XDR
  • CrowdStrike Falcon
  • Wazuh SIEM
  • Windows Defender
  • Endpoint Hardening

Security Operations

  • Incident Response
  • Malware Analysis
  • Web Shell Detection
  • IOC Investigation
  • Windows Event Log Analysis
  • Security Auditing
  • Threat Hunting
  • Log Analysis

Infrastructure Security

  • Windows Server Hardening
  • IIS Security Hardening
  • SQL Server Security Hardening
  • Active Directory Security
  • RDP Hardening
  • Least Privilege
  • Secure Remote Access
  • Firewall Management

Email Security

  • SPF
  • DKIM
  • DMARC
  • Exchange Online Protection
  • Anti-Spam
  • Anti-Phishing
  • Mail Flow Security

Network Security

  • FortiGate Firewall
  • VPN
  • IDS / IPS
  • Network Traffic Analysis
  • Wireshark
  • TCP/IP Analysis
  • DNS Security

Vulnerability Management

  • Vulnerability Assessment
  • Patch Management
  • CVE Mitigation
  • Security Compliance
  • Risk Assessment

💾 Databases & Web

  • Microsoft SQL Server
  • MySQL
  • PostgreSQL
  • IIS
  • Apache
  • Tomcat
  • ARR
  • URL Rewrite

🖥 Virtualization

  • Proxmox VE
  • VMware Workstation
  • Oracle VirtualBox

🔄 Backup & Migration

  • Acronis Cyber Protect
  • Microsoft 365 Migration
  • Exchange Migration
  • SharePoint Migration
  • OneDrive Migration
  • SQL Migration
  • VM Migration

⚡ Automation

  • PowerShell
  • Bash
  • Windows Batch
  • Scheduled Tasks
  • REST API
  • PowerShell Remoting

🛠️ Tech Stack

📂 Featured Projects

🖥 Enterprise Server Monitoring Platform

Enterprise monitoring solution built using React, Node.js, PowerShell, SQLite, and Bash.

Features

  • Real-time CPU Monitoring
  • RAM Monitoring
  • Disk Monitoring
  • TCP Connection Monitoring
  • Windows Service Monitoring
  • IIS Monitoring
  • Linux Agent
  • Windows Agent
  • Event Log Monitoring
  • OTA Configuration Updates
  • Interactive Dashboard

📊 Windows Server Health Dashboard

PowerShell-based monitoring solution.

Features

  • CPU & Memory Analysis
  • User Session Monitoring
  • IIS Status
  • SQL Server Monitoring
  • HTML Dashboard
  • Historical Reports
  • Alerting
  • Interactive Charts

🛡 Windows Server Security Audit Toolkit

Enterprise PowerShell auditing toolkit.

Features

  • Security Risk Scoring
  • Firewall Audit
  • SMB Audit
  • Antivirus Detection
  • RDP Configuration Review
  • Local Administrator Audit
  • Event Log Analysis
  • Executive HTML Report

☁️ Microsoft 365 Automation Toolkit

Automation scripts for Microsoft 365 administration.

Includes

  • User Provisioning
  • License Assignment
  • Mailbox Management
  • Teams Automation
  • SharePoint Administration
  • Exchange Reporting
  • Intune Reporting
  • Bulk User Operations

🏆 Certifications

Certification Issuer
Microsoft 365 Administrator Expert (MS-102) Microsoft
Certified Ethical Hacker (CEH Master) EC-Council
Certified Network Defender (CND) EC-Council
Plesk Obsidian Professional Plesk
Acronis Cloud Tech Associate Acronis

🔥 GitHub Streak

📊 Contribution Graph

🏅 GitHub Trophies

📫 Connect With Me

💡 Motto

"Automating infrastructure, securing environments, and building reliable enterprise solutions."

Pinned Loading

  1. Forensics-Credential-Harvester Forensics-Credential-Harvester Public

    Forensics Credential Harvester is a cross-platform tool for digital forensics professionals to extract and recover browser credentials from popular web browsers (Chrome, Firefox, Safari, Brave, and…

    Python 5 4

  2. sys-admin-book sys-admin-book Public template

    System Admin Notes

    3 1

  3. M365-Audit-Report-Generator M365-Audit-Report-Generator Public

    M365-Audit-Report-Generator

    PowerShell

  4. Windows-Server-Audit-Script Windows-Server-Audit-Script Public

    A comprehensive PowerShell-based security auditing tool for Windows systems that generates detailed HTML reports with security findings, risk assessments, and remediation recommendations.

    PowerShell 1

  5. Windows-Server-Health-Monitor Windows-Server-Health-Monitor Public

    A robust, continuous Windows Server monitoring script written in PowerShell that generates a beautiful, interactive, and premium HTML dashboard using Chart.js. The script gives you real-time insigh…

    PowerShell 1

  6. Centralized-Monitoring-System Centralized-Monitoring-System Public

    An enterprise-grade, cross-platform telemetry and server health monitoring dashboard built with React, Node.js, and SQLite.

    JavaScript 1

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