Core Panel Team

SSH Hardening on Ubuntu: Secure Access Without Lockouts

Harden SSH on an Ubuntu VPS with verified keys, clear authentication rules, restricted network access, and a staged testing plan that preserves recovery.

PostgreSQL Security on a VPS: Lock Down Database Access

Secure PostgreSQL access on a VPS with narrow network exposure, ordered authentication rules, SCRAM credentials, verified TLS connections, and limited application roles.

VPS Secrets Management: Secure .env Files and API Keys

Protect VPS application secrets with sensible file permissions, controlled runtime access, safe deployment practices, credential rotation, and a clear response to leaks.

Object Storage vs Local Storage for VPS File Uploads

Compare local VPS storage and object storage for application uploads. Plan shared access, private downloads, upload validation, retention, costs, and a reversible migration.

Reverse Proxy vs Load Balancer: A VPS Hosting Guide

Understand how reverse proxies and load balancers work together on a VPS. Compare practical layouts and plan for health checks, shared state, HTTPS, and failure handling.

Blue-Green Deployment on a VPS: Design and Rollback

Design a blue-green deployment on a VPS with Nginx, compatible database changes, shared sessions, and controlled worker transitions. Learn what makes rollback reliable.

Single VPS vs Separate Database Server: When to Split

Decide when to keep your application and database on one VPS, and when to separate them. Compare resource contention, network latency, reliability, and migration tradeoffs.

How to Fix Nginx 413 Request Entity Too Large on Ubuntu

Fix rejected uploads on an Ubuntu VPS by tracing 413 errors through Nginx, PHP-FPM, application validation, and CDN limits, with a practical upload-policy example.

How to Fix No Space Left on Device on an Ubuntu VPS

Diagnose a full Ubuntu VPS without guessing what to delete. Check filesystem capacity, inodes, deleted open files, logs, package caches, and Docker storage.

How to Fix Certbot Renewal Failures on Ubuntu with Nginx

Diagnose Certbot renewal failures on an Ubuntu VPS. Check DNS, IPv6, HTTP validation, renewal timers, Nginx certificate paths, and the certificate visitors receive.

VPS High Availability: Remove Single Points of Failure

Build a practical VPS high availability plan. Identify shared dependencies, compare recovery patterns, and test traffic routing, database failover, and backups.

How to Fix 502 Bad Gateway in Nginx on Ubuntu

Troubleshoot Nginx 502 errors on an Ubuntu VPS. Follow the logs to PHP-FPM sockets, Node.js or Python services, upstream ports, permissions, and recovery checks.