This is something new to me and has become a issue.
I am looking for one that supports UBB the best.
I also will be migrating the front pages to wordpress.
So one canidate Sucuri.
A little pricey at a starting price of $199.00 a year which is sitewide.
Another is wordpress plugings (wordfence,stackpath) but I am not sure they will cover wordpress and ubb as well.
So the bottom line question is , What are others using for UBB and does it serve the front end non UBB pages as well.