How to test a website being protected by WAF?

Put <script>alert("123")</script> in the URL

E.g. www.abc.com/<script>alert("123")</script>

Different WAF have different block page like the following:

How to test a website being protected by WAF?

The HTML5 test - How well does your browser support HTML5?

http://html5test.com/

The HTML5 test - How well does your browser support HTML5?

malware sample website

AVP Club

http://www.avpclub.ddns.info/discuz/

Malwarebytes

http://www.malwarebytes.org/

Remoteroot

http://www.remoteroot.net/

Offensive Computing

http://www.offensivecomputing.net/

PC Zone

http://www.pczone.com.tw/vbb3/forum/28/

Deepsoft

http://soft.deepin.org/

malware sample website