1. F-Secure. Backdoor: W32/HAVEX description.
https://www.f-secure.com/v-descs/backdoor_w32_havex.shtml
2. OWASP Top. 10 2013. OWASP project homepage.
https://www.owasp.org/index.php/Top_10_2013-Top_10
3. ModSecurity project homepage.
https://www.modsecurity.org/
4. PHPIDS project homepage.
https://github.com/PHPIDS/PHPIDS
5. NAXSI project homepage.
https://github.com/nbs-system/naxsi