Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
AWS WAF - AWS WAF is a web application firewall that helps protect your web applications from common web exploits.
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
ModSecurity - ModSecurity is an Open Source web application firewall developed by Trustwave's SpiderLabs.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Barracuda Web Application Firewall - Barracuda Web Application Firewall offers security and DDoS protection against automated & targeted attacks.