Server Administration

1

SSH Hardening Guide

Secure your SSH server with key-based auth, configuration hardening, and brute-force protection.

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2

iptables Basics

Configure Linux firewall rules with iptables: chains, tables, rules, and common configurations.

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3

Reverse Proxy Setup

Set up Nginx as a reverse proxy for load balancing, SSL termination, and multiple applications.

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4

fail2ban & Rate Limiting for Servers

Protect your server from brute-force attacks and abuse using fail2ban for automatic IP banning and rate limiting strategies.

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5

Monitoring Network Traffic on Linux Servers

Tools and techniques for monitoring network traffic, identifying bandwidth consumers, and detecting anomalies on Linux servers.

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6

Load Balancing Fundamentals

Understand load balancing algorithms, Layer 4 vs Layer 7 balancing, health checks, and how to set up HAProxy and Nginx as load balancers.

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7

Nginx Configuration for Web Servers

Master Nginx configuration for web servers. Learn about server blocks, reverse proxying, SSL termination, caching, and performance tuning.

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8

HAProxy Load Balancing Configuration

Configure HAProxy for production load balancing with health checks, SSL termination, rate limiting, and sticky sessions.

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9

Docker Networking: Bridge, Host, and Overlay

Understand Docker networking modes, container communication, port mapping, custom bridge networks, and multi-host overlay networking with Docker Swarm.

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10

Kubernetes Networking Fundamentals

Understand Kubernetes networking model, pod-to-pod communication, Services, Ingress controllers, and network policies for cluster security.

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11

Setting Up a DNS Server (BIND/Unbound)

Deploy and configure authoritative and recursive DNS servers using BIND and Unbound. Cover zones, records, forwarding, DNSSEC, and caching.

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12

Log Aggregation with ELK Stack

Set up centralized log aggregation with Elasticsearch, Logstash, and Kibana. Collect logs from multiple servers and create searchable dashboards.

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13

Server Hardening Checklist for Linux

Harden Linux servers against common attack vectors. Cover SSH security, firewall rules, automatic updates, user management, and audit logging.

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14

SSL Certificate Automation with Let's Encrypt

Automate SSL/TLS certificate issuance and renewal using Let's Encrypt, Certbot, and ACME. Cover HTTP and DNS challenges, wildcard certificates, and monitoring.

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15

CDN Configuration and Origin Shield Setup

Configure a CDN for performance and reliability. Understand edge caching, cache-control headers, origin shield, purging, and Cloudflare/AWS CloudFront setup.

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