How to Automate Customer Confirmation Emails with Postfix on Ubuntu
Setting Up Automated Transactional Emails on Your Own Server If your business pays for SendGrid, Mailgun, or similar services just to send booking co...
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UFW Firewall Setup for Ubuntu Web Servers
UFW Firewall Rules for Web Servers: What to Open, What to Block, and Why A newly installed Ubuntu server has every port open by default. This is acce...
How to Set Up an Nginx Reverse Proxy with Let's Encrypt on Ubuntu
Setting Up a Reverse Proxy with Nginx and Let's Encrypt on Ubuntu Running multiple web applications on a single server, exposing services safely to t...
Session Security in PHP: The Three Problems That Are Invisible Until They Are Not
Session Fixation: When the Attacker Sets the Session ID Before You Log In Session fixation is one of those vulnerabilities that seems theoretical unt...
Cross-Site Scripting in PHP: Why Output Encoding Beats Input Filtering
Cross-Site Scripting in PHP: Why Output Encoding Is the Real Fix Input filtering sounds like the logical solution to cross-site scripting. You inspec...
SQL Injection Is Still the Most Common
Why SQL Injection Still Dominates PHP Breach Reports SQL injection has appeared in the OWASP Top 10 in every edition since the list began. It has bee...