Barracuda Web Application Firewall - Barracuda Web Application Firewall offers security and DDoS protection against automated & targeted attacks.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
SiteLock - SiteLock software provides advanced website security, daily security scans, web app firewall with a CDN to deliver content more securely.
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
AWS WAF - AWS WAF is a web application firewall that helps protect your web applications from common web exploits.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996