As a extra tidbit you may want to use cloudflare to control visitors.
It is free to a point.
Support for CloudFlare is limited at best in v7.5.7; it's from 2010, you can't expect it to even function with a modern build of PHP (I believe that it won't even support PHP5.6, which is the final release of the PHP5 channel).
HTTPs support is also limited as several strings in v7.5.7 are hard-coded for HTTP, additionally there is no support for Stop Forum Spam or support to store IPv6 addresses (read IPv6 addresses will be truncated if stored at all).
We're currently working on PHP8 support and are planning to completely drop support for PHP5 at some point in the near future (PHP7 has been around since 2015 and should be our new minimum in the future; PHP5 reached End of Life in 2018).