To start off, I can just revoke all the permissions for creating and replying to topics however I think the forum will still be executing cron jobs and doing stuff with the database; I don't want this. Whatever is on the forum from the date of closing will be it. I don't need the forum running crons or anything else. Just simply viewing old topics.
So tl;dr, I would like to convert my old forum into a complete read-only mode. How would I go about doing this?