A freshly bought server is like a house with no locks: default passwords, open ports, and enabled root login are all entry points for attackers. This guide walks through six steps — updating the system, hardening SSH, firewalls, least privilege, logging, and backups — with a checklist a beginner can follow directly.
A practical guide to the three Linux firewall tools - UFW, iptables, and nftables - covering default policies, common rules, port allow-lists, and brute-force rate limiting.
AI prompt template and resources for Security Hardening
Automated website file and database backup script with local retention and remote S3/object storage sync.
One-click SSL certificate setup with Certbot and Let's Encrypt — single domain, wildcard, auto-renewal, and troubleshooting.
A complete server security hardening script — non-root user, SSH lockdown, UFW firewall, Fail2Ban, and auto-updates.
HTTP security headers are the first line of defense against XSS, clickjacking, MIME sniffing, and other web attacks.