How does Sucuri Website Firewall block?

Viruses and worms
1

See for server cp15013 blocks, this example: htxps://www.rab7an.com/en/advertise-info/MTUxNDk=

What is going on?

You are not allowed to access the requested page. If you are the site owner, you can whitelist your IP using this procedure: https://kb.sucuri.net/cloudproxy/Whitelist+and+Blacklist/whitelisting-IP. If you are not the owner of the web site, you can contact us at cloudproxy@sucuri.net. Also make sure to include the block details (displayed below), so we can better troubleshoot the error.
Block details

Your IP: 197.47.131.222
URL: www.rab7an.com/profile/saveadsimages/
Your Browser: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36
Block ID: RCE010
Block reason: Exploit attempt denied.
Time: Tue Apr 4 14:13:07 2017
Server ID: cp15013
Sucuri Firewall

Your request was blocked by the Sucuri Firewall. It is a protection that stands between this site and the rest of the world and stop attacks, malware infections, DDoS, brute force attempts and mostly anything that can harm it.

Not only that, but your sites get cached, speeding it up quite a bit. Details here: https://sucuri.net/website-firewall

polonus

P.S. You can do various blacklist checks here: https://mainehost.com/support/website-malware-blacklist-checker/
and then we see for instance that Yandex does not blacklist the site as given in our example…

Damian