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Page 24 of 24 of the KEYDAL blog: guides on hosting, domains, servers, e-commerce and software.
Password Hashing: bcrypt, argon2id and scrypt Compared
Modern password hashing - bcrypt, argon2id and scrypt compared, salt, pepper, work factor tuning and Node.js / Python implementations.
SecurityOWASP Top 10 2026: Web Application Risks and How to Prevent Them
A walkthrough of the OWASP Top 10 2026 - Broken Access Control, Injection, Cryptographic Failures, SSRF and more, with practical mitigations.
SoftwareOpenTelemetry Distributed Tracing: Microservice Observability
Distributed tracing with OpenTelemetry - spans, trace context, auto-instrumentation, Jaeger and OTLP export setup guide.
SecurityOAuth 2.0 and OIDC: Secure Auth with the Authorization Code Flow
OAuth 2.0 and OpenID Connect - authorization code flow, PKCE, scopes, refresh tokens and a guide to integrating social login.
SoftwareNode.js Performance: Event Loop, Memory Leaks and Clinic.js Profiling
Optimising Node.js performance - the event loop, blocking operations, memory leak detection, Clinic.js profiling and benchmarking.
SoftwareNode.js Cluster and PM2 in Production: Zero-Downtime Deploys
Cluster mode, PM2 process manager, zero-downtime reload, log management, monitoring and ecosystem.config.js - a production Node.js guide.
HostingNginx vs Apache: Which One Should You Choose and When
Compare Nginx and Apache HTTP server - architecture, performance, configuration model, .htaccess, modules and which one fits which scenario.
HostingNginx Configuration: Reverse Proxy, Cache and Rate Limiting
Practical Nginx recipes for reverse proxy, FastCGI cache, proxy_cache, limit_req, gzip, HTTP/2 and SSL - with production-ready examples.
SoftwareNext.js 15 App Router: Server Components, Streaming and Parallel Routes
Master the Next.js 15 App Router - React Server Components, streaming, Suspense, parallel and intercepting routes, server actions and modern React.
SoftwareMySQL vs PostgreSQL: Data Model, Performance and Scenario Comparison
Compare MySQL and PostgreSQL - data types, ACID, JSON support, performance, replication and which scenarios fit which database.
SEOLocal SEO: Google Business Profile, Local Keywords and Backlinks
Local SEO guide - Google Business Profile setup, local keyword research, NAP consistency, local backlinks and review strategy.
HostingLinux Server Administration Basics: SSH, Firewall, Cron, and Service Management
SSH key authentication, UFW/iptables firewall rules, systemd service management, cron scheduling, and the core Linux commands every admin should know.
HostingFree SSL with Let's Encrypt: Certbot, Auto-Renewal and Wildcard Certs
Install Let's Encrypt SSL certificates end-to-end - Certbot, auto-renewal, wildcard certificates, DNS challenge and Nginx/Apache integration.
HostingKubernetes Basics: Pods, Deployments, Services and Ingress
Kubernetes fundamentals - Pod, Deployment, Service, Ingress, ConfigMap, Secret, autoscaling and essential kubectl commands for getting started.
SecurityJWT Security Pitfalls: alg:none, Weak Secrets, JKU Attack and How to Defend
JSON Web Token security issues - alg:none, weak secrets, JKU/X5U injection, algorithm confusion and the controls that make JWT safe.
SoftwareJest Unit Testing: Mocks, Spies, Coverage and Test Driven Development
JavaScript/TypeScript unit testing with Jest - describe/it, matchers, mocks, spies, async tests, snapshots and coverage.
SecurityHTTPS and TLS 1.3: Modern Web Encryption and Performance
HTTPS and TLS 1.3 - handshake tuning, cipher suite selection, HSTS, OCSP stapling, an SSL Labs A+ score and performance.
SEOHow Search Engines Work and How to Do SEO: A Complete Guide
What a search engine is, how Google crawls and ranks pages, how to run SEO analysis, and how keyword research really works.
APIGraphQL vs REST: Which API Style Should You Pick and When
Compare GraphQL and REST - query/mutation, the N+1 problem, caching, subscriptions, over-fetching and which scenario each one fits.
SoftwareGitHub Actions CI/CD: Node.js Workflows, Deploys and Docker Builds
Write GitHub Actions workflows - Node.js tests, Docker builds, SSH deploys, secret management and matrix strategy for a complete CI/CD pipeline.
HostingProtecting SSH from Brute Force with Fail2ban: Install and Configure Jails
Install Fail2ban, configure the SSH jail, write custom jails, tune ban times and monitor logs - a practical Linux server security guide.
SoftwareExpress.js Middleware Pattern: Authentication, Logging and Error Handling
The Express middleware architecture - authentication, authorization, logging, error handling and writing your own, with production-grade Node.js examp
HostingEssential Linux Server Commands Every Administrator Should Know
The most-used commands in Linux server administration: file operations, system and resource monitoring, networking.
HostingElastic Stack (ELK): Log Analysis with Elasticsearch, Logstash and Kibana
Centralized log management with the ELK Stack - Elasticsearch, Logstash, Kibana and Filebeat setup, index management and log search.
SEOE-commerce SEO: Product Pages, Schema Markup and Category Strategy
E-commerce SEO guide - product page optimization, Product schema, category pages, faceted navigation, canonical URLs and managing duplicate content.
HostingWhat Is a Domain? Domain Registration, WHOIS Lookup, and TLD Guide
What a domain name is, how to buy one, how to run a WHOIS lookup, and the differences between .com, .net, .org, and country-code TLDs. A complete guid
HostingDocker Compose: Multi-Service Architecture and Production Deployment
Build multi-container apps with Docker Compose - web, DB, cache and reverse proxy services, network and volume management, production best practices.
SEOWhat Is Digital Marketing? Channels, Strategies, and a Beginner Guide
What digital marketing is, which channels (SEO, Google Ads, Meta Ads, email) to use, and how to build a strategy. A practical guide for SMBs.
HostingDeploying Applications with Docker: From Scratch to Production
Dockerfile authoring, multi-stage builds, docker-compose, container networking, volume management, and production deployment best practices.
SecurityMulti-Layer DDoS Protection with Cloudflare and Nginx
DDoS attack types (L3/L4/L7), Cloudflare WAF, Nginx rate limiting, Fail2ban and application-level defences - the full stack.
SoftwareDatabase Backup Strategies: Full, Incremental, PITR and the 3-2-1 Rule
Design a production backup plan - full vs incremental, Point-in-Time Recovery, the 3-2-1 rule and practical examples for MySQL and PostgreSQL.
SEOPage Speed and Core Web Vitals 2026: Optimizing LCP, INP, and CLS
A practical guide to Google Core Web Vitals: LCP, INP, and CLS. Improve Lighthouse scores with lazy loading, font optimization, and CDN delivery.
APIAPI Rate Limiting: Token Bucket, Sliding Window and Redis Implementation
API rate limiting algorithms - fixed window, sliding window, token bucket, leaky bucket and distributed implementation with Redis.
HostingAnsible Server Automation: Playbooks, Roles and Inventory
Agentless server management with Ansible - playbooks, roles, inventory, vault, idempotent tasks and a full setup-automation guide.
SoftwareAdvanced TypeScript: Generics, Utility Types and Conditional Types
Advanced TypeScript - generics, utility types (Partial, Pick, Omit, Record), conditional types, infer, template literal types and mapped types.
SoftwareAdvanced Git: Rebase, Cherry-pick, Bisect, and Stash in Practice
Rebase vs merge, interactive rebase, cherry-pick, bug hunting with bisect, stash management, and recovery with reflog. Advanced Git workflow guide.
HostingConnecting to a Server with SSH: Key-Based Authentication
What is SSH and how do you connect to a server? Connecting with a password and an SSH key, secure configuration and fixing common SSH errors.
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