AWS VPC Day 6 | NACL vs Security Group | Stateless vs Stateful | Live Firewall Demo | English + Odia

🌐 AWS VPC Day 6 | NACL vs Security Group | Firewall Architecture & Live Demo | English + Odia Welcome to AWS VPC – Day 6! 🚀 In this session, we move deeper into AWS VPC Network Security and understand how Network ACL (NACL) and Security Groups (SG) control traffic to and from AWS resources. We cover the concepts from theory to practical implementation, including NACL properties, Security Group behavior, firewall architecture, and a live demonstration of how port access can be controlled for a Web Server. The session is explained in English + Odia (ଓଡ଼ିଆ) with practical examples and a real AWS hands-on demonstration. 📚 Topics Covered in This Video 🔹 What is NACL (Network Access Control List)? 🔹 Why do we need NACL in AWS VPC? 🔹 NACL vs Security Group – key differences 🔹 Understanding all important NACL properties 🔹 Inbound Rules & Outbound Rules 🔹 Allow & Deny rules in NACL 🔹 Rule Numbers and Rule Evaluation 🔹 How to Configure NACL step by step 🔹 Understanding Security Group rules 🔹 NACL and Security Group working together 🔹 Designing a Firewall Architecture in AWS 🔹 Stateless vs Stateful Firewall 🔹 Why NACL is Stateless 🔹 Why Security Group is Stateful 🔥 Live Practical Demo In the hands-on portion of this session, we demonstrate how to configure NACL and Security Group rules and observe their effect on traffic reaching a Web Server. 🖥️ Real Demo – Port Access We configure firewall rules and test: Client → Port Access →Web Server You'll see how changing Security Group and NACL rules affects whether traffic is allowed or blocked. This helps you understand the difference between theoretical firewall rules and actual network traffic behavior. 🏗️ Firewall Architecture We also discuss how NACL and Security Groups can be positioned as different layers of network security: Internet ↓ VPC / Subnet ↓ 🛡️ NACL ↓ 🔐 Security Group ↓ 🖥️ EC2 / Web Server You'll understand how these two AWS security mechanisms work together to provide layered network security. ⚡ Stateless vs Stateful One of the most important concepts covered in this session: NACL → Stateless Traffic is evaluated independently for inbound and outbound directions. Security Group → Stateful If an incoming connection is allowed, the response traffic is automatically allowed based on the established connection. Understanding this difference is extremely important for: ✅ AWS Interviews ✅ Cloud Networking ✅ DevOps Interviews ✅ AWS Certification ✅ Troubleshooting connectivity issues ✅ Designing secure AWS architectures 🎯 What You Will Learn By the end of this session, you'll understand: ✅ What NACL is ✅ How NACL works ✅ NACL properties and rules ✅ NACL vs Security Group ✅ Stateful vs Stateless security ✅ How to configure NACL ✅ How Security Groups control traffic ✅ How to design layered firewall security ✅ How to troubleshoot port access ✅ How NACL + SG work together in a real AWS environment 🌐 Theory + Practical This isn't just a theoretical session. We cover the concepts → architecture → configuration → live traffic/port testing, so you can understand how AWS network security works in an actual environment. English + Odia (ଓଡ଼ିଆ) 👨‍💻 Who Should Watch? This session is useful for: ✅ AWS Beginners ✅ Cloud Computing Students ✅ DevOps Beginners ✅ AWS Certification Aspirants ✅ Cloud & DevOps Interview Preparation ✅ Network Engineers ✅ Aspiring Cloud/DevOps Engineers 📚 AWS VPC Learning Series Day 1 → VPC Fundamentals, Default VPC, CIDR & Custom VPC Day 2 → IGW, Public/Private Subnet, Route Table, Multi-AZ & High Availability Day 3 → Public vs Private Subnet, EC2 Communication & Bastion Host Day 4 → 2-Tier Architecture, High Security & High Availability Day 5 → NAT Gateway, Private Database, Bastion Host & Elastic IP Day 6 → NACL, Security Group, Firewall Architecture & Stateless vs Stateful 🚀 More AWS & Cloud/DevOps sessions coming soon! If you find this session useful: 👍 Like 🔄 Share 🔔 Subscribe And share it with someone who is learning AWS, Cloud, Networking or DevOps. ☁️ Learn • Practice • Build • Grow — CloudMaster Academy