OK, so I showed you how to perform some basic SQLi previously, but there will be times that it starts off working and then you find yourself facing a FORBIDDEN page (403 Error). Typically you can find the vulnerable page, find the column count and then when you switch to use the UNION SELECT statement you get the errors starting up. This is typically due to the server side rules that are filtering out your request. This is often referred to as the Web Application Firewall or WAF, but don’t worry as there are ways we can beat them. You can get pretty creative with the methods used but for now I will show how to use comments to bypass the filters, sometimes referred to as inline comments or C comments.