Security

#Security· October 29, 2026·9 min read

UFW Firewall Rules for SSH and Web Hosting

Set UFW rules for SSH, HTTP and HTTPS on an Ubuntu VPS. Preserve remote access, test new connections, and spot Docker or cloud firewall exceptions.

#Security· October 29, 2026·12 min read

Secure SSH Access to a VPS Without Losing Your Login

Harden SSH on an Ubuntu or Debian VPS with key-based admin access, effective-config checks, firewall choices, and a safe apply, test, and rollback sequence.

#Security· October 29, 2026·15 min read

TLS Certificates on Linux: Set Up Certbot and Verify Renewal

Choose an ACME method, install Certbot on Ubuntu/Nginx, verify the public HTTPS certificate, and test renewal, deployment, and expiry monitoring.

#Security· October 29, 2026·17 min read

Isolate WordPress Sites on One Server with Separate PHP-FPM Pools

Separate WordPress PHP users, pools, sockets, files, and databases on one Ubuntu VPS. Includes staged migration, rollback, and two-way access tests.