Test the Web Application Firewall (WAF) before changing the DNS
To make sure the Web Application Firewall (WAF) is working as expected before changing DNS records, you can configure your operating system to use the Sucuri WAF IP address when accessing your website.
To do this, edit the hosts file on your operating system as explained in Bypassing the Web Application Firewall (WAF) for testing.
However, instead of using the hosting IP address, as explained in that article, youll use the WAF IP address that can be found on the main page of your domain’s WAF dashboard.
Once you've edited your hosts file, use your browser's incognito mode to help ensure the DNS isn't cached.