I was not able to find any posts or articles related to my issue so I am creating this one to see if I'm the only one that's been affected.
When a file containing two consecutive periods (ex: "file..1.txt","file..200.jpg") is attached to a Jira ticket/issue, it will not open and the following error appears:
"Forbidden
You don't have permission to access this resource."
However, the file can still be downloaded by using the "Download All" option in the attachments section. If you remove a period in the name of the file, it can be opened successfully on Jira.
I'm not sure if this is a config issue on Apache/Jira or if this is a bug with Jira itself. I do see that renaming uploaded files is a pending feature request. That might help with the issue.