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🏢 1. Enterprise Production Web Application Architecture - Coggle Diagram
🏢 1. Enterprise Production Web Application Architecture
🌍 1.1 Internet Users
👤 Client Browser
🌐 HTTP/HTTPS Request
🔐 TLS Handshake
📡 DNS Resolution
🔹 Domain Lookup
🔹 IP Address Discovery
🔹 Traffic Routing
🛡️ 2. Cloudflare CDN + Edge Security
☁️ 2.1 Cloudflare DNS
🔹 Authoritative DNS
🔹 A Record
🔹 CNAME Record
🔹 Anycast Network
🚀 2.2 CDN Content Delivery
🔹 Static Content Cache
🖼️ Images
📄 HTML
📦 JavaScript
🎨 CSS
🔹 Reduce Origin Server Load
🛡️ 2.3 Cloudflare Security
🔥 DDoS Protection
🚧 Rate Limiting
🤖 Bot Management
🔐 SSL/TLS Encryption
🛠️ Cloudflare Tools
🔹 Dashboard
🔹 API
🔹 Cloudflare Logs
🔹 Analytics
🔥 3. Enterprise Firewall Layer
🧱 3.1 Network Firewall
🔹 Perimeter Security
🔹 Packet Filtering
🔹 IP Allow/Deny
🔹 Port Control
🛡️ 3.2 Firewall Technologies
🏢 Palo Alto Firewall
🏢 Fortigate Firewall
🏢 Cisco ASA
🐧 Linux Firewall
🔥 nftables
🔥 iptables
🔥 firewalld
🐧 3.3 Linux Firewall Commands
🔍 Check Firewall Status
firewall-cmd --state
📋 View Rules
firewall-cmd --list-all
➕ Allow Port
firewall-cmd --add-port=443/tcp
💾 Permanent Rule
firewall-cmd --permanent --add-service=https
📊 4. Nginx Reverse Proxy Layer
🌐 4.1 Purpose of Reverse Proxy
🔹 Client does not directly access application
🔹 Hides backend servers
🔹 Traffic Management
🔹 SSL Termination
🔹 Load Distribution
⚙️ 4.2 Nginx Functions
🔐 SSL Termination
HTTPS Client
↓
Nginx Decrypt TLS
↓
HTTP Backend
⚖️ Load Balancing
🔹 Round Robin
🔹 Least Connection
🔹 IP Hash
🗜️ Compression
📦 Static File Serving
🚦 Request Routing
🐧 4.3 Nginx Linux Commands
📌 Check Service
systemctl status nginx
▶️ Start Service
systemctl start nginx
🔄 Restart
systemctl restart nginx
🧪 Configuration Test
nginx -t
📄 Logs
/var/log/nginx/access.log
/var/log/nginx/error.log
📁 4.4 Nginx Configuration
/etc/nginx/
📄 nginx.conf
📂 conf.d/
📂 sites-enabled/
📂 sites-available/
🛡️ 5. ModSecurity WAF Layer
🔥 5.1 Purpose of WAF
🛑 Detect Web Attacks
💉 SQL Injection
<script>
OS Command Injection
Path Traversal
File Upload Attack
Remote Code Execution
🛡️ 5.2 ModSecurity Architecture
Client Request
↓
Nginx/Apache Module
↓
ModSecurity Engine
↓
OWASP CRS Rules
↓
Allow / Block
📚 5.3 OWASP Core Rule Set
🔹 SQL Injection Rules
🔹 XSS Rules
🔹 Scanner Detection
🔹 Protocol Validation
🔹 Bad Bot Detection
🐧 5.4 ModSecurity Linux Commands
📦 Install
apt install libnginx-mod-security2
🔍 Check Module
nginx -V
📄 Logs
/var/log/modsec_audit.log
⚙️ Configuration
/etc/modsecurity/
⚖️ 6. Load Balancer Layer
🎯 6.1 Purpose
🔹 High Availability
🔹 Traffic Distribution
🔹 Server Health Checking
🔹 Failover
🛠️ 6.2 Enterprise Load Balancers
🏢 F5 BIG-IP
🏢 Citrix ADC
🏢 HAProxy
☁️ AWS Elastic Load Balancer
🐧 6.3 HAProxy Example
Client
↓
HAProxy
↓
App Server 1
App Server 2
App Server 3
🐧 HAProxy Commands
systemctl status haproxy
systemctl restart haproxy
/etc/haproxy/haproxy.cfg
💻 7. Application Server Layer
⚙️ 7.1 Application Types
☕ Java Application
Tomcat
Spring Boot
🐍 Python Application
Django
Flask
🟢 Node.js
Express.js
🐘 PHP
PHP-FPM
🐧 7.2 Linux Application Management
📌 Process Management
ps aux
top
systemctl status application
📄 Application Logs
/var/log/application/
🔍 Monitoring
Prometheus
Grafana
Zabbix
🔐 7.3 Application Security
🔑 Authentication
LDAP
Active Directory
MFA
🛡️ Security Controls
Input Validation
Secrets Management
Patching
🗄️ 8. Database Server Layer
💾 8.1 Database Technologies
🐬 MySQL
🐘 PostgreSQL
🏢 Oracle Database
🟦 Microsoft SQL Server
🔐 8.2 Database Security
👤 User Management
CREATE USER
GRANT
REVOKE
🔒 Encryption
TLS
Encryption At Rest
📦 Backup
mysqldump
pg_dump
🐧 8.3 Database Linux Commands
systemctl status mysql
mysql -u root -p
tail -f /var/log/mysql/error.log
📊 9. Enterprise Monitoring
📈 Infrastructure Monitoring
Zabbix
Nagios
Prometheus
📊 Visualization
Grafana
Kibana
📥 Log Management
ELK Stack
Elasticsearch
Logstash
Kibana
Filebeat
Metricbeat
🚨 10. Security Monitoring SOC
🛡️ SIEM
Elastic Security
Splunk
IBM QRadar
🔍 Detection
Failed Login
Malware
Privilege Escalation
Web Attack
📋 Incident Response
1️⃣ Detection
2️⃣ Investigation
3️⃣ Containment
4️⃣ Eradication
5️⃣ Recovery
🔐 11. Linux Enterprise Hardening
👤 User Security
/etc/passwd
/etc/shadow
sudo
visudo
🔑 Authentication
SSH Keys
MFA
PAM
🛡️ SELinux
enforcing mode
policies
labels
🔥 Firewall
nftables
firewalld
📦 Patch Management
yum update
apt update
🚀 12. Enterprise Deployment Workflow
👨💻 Developer
↓
📦 Git Repository
↓
🔄 CI/CD Pipeline
Jenkins
GitLab CI
GitHub Actions
↓
🐳 Container Platform
Docker
Kubernetes
↓
🏭 Production Deployment
🌐 13. Complete Traffic Flow
👤 User
↓
☁️ Cloudflare CDN
↓
🔥 Firewall
↓
🌐 Nginx Reverse Proxy
↓
🛡️ ModSecurity WAF
↓
⚖️ Load Balancer
↓
💻 Application Servers
↓
🗄️ Database Servers
📊 Monitoring
↓
SIEM
↓
SOC Team