Server Administration

1

SSH Hardening Guide

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

6 min read

2

iptables Basics

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

6 min read

3

Reverse Proxy Setup

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

5 min read

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.

10 min read

5

Monitoring Network Traffic on Linux Servers

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

10 min read

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.

11 min read

7

Nginx Configuration for Web Servers

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

10 min read

8

HAProxy Load Balancing Configuration

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

10 min read

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.

9 min read

10

Kubernetes Networking Fundamentals

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

11 min read

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.

10 min read

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.

10 min read

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.

9 min read

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.

8 min read

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.

9 min read