I have other domains that direct traffic to my site, should I add these to CloudFlare as well?
Discover the information in the passage below regarding addon domains and their redirection in CloudFlare.
If the redirection is made to the domain in question and not to the IP, you will not encounter problems, these accesses will be handled by CloudFlare.
However, if they point to the IP, the traffic will go directly to the server where you have hosting and will not pass through CloudFlare.