How to protect your forums from malware or viruses?

[romaine]

What are the best ways that you are applying to protect your forums from malware or viruses?
I am considering to buy and install a service like this (ModSecurity Rules from Malware.Expert) on my WHM/cPanel to keep my websites against malware or viruses. What is your experience with them? or you can share your methods to against malware or hackers for your forums/sites or blogs?

Thanks in advance.