How can I create a filter which will display those issues that have been commented on in the last 24 hrs?
I don't need to see the comment in the filter and email notifications are not an option (for various reasons).
JQL Tricks Plugin, a commercial one, has a method to get issues where a comment was added in the last 24hrs. You can add absolute or relative dates based on your requirement.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.