So my website which uses xenforo has been a target of heavy attacks for the last 3 weeks. I guess a hacker group has sworn to take my site down and will not stop until we are gone. I got the following message from our "friends" that they will be now using a SQL injection attack in 2 days and posted some issues and flaws with xenforo. Unfortunately I have no idea to prevent this and what to do to beef up security. Also how to fix the issues stated by these hackers...Any ideas or documents I can start reading up?