If you don't have a certain device or application, you should not be running the rules for them. Here are a few that I have gone through. Just add them to your exclude rules list. Feel free to verify these and add other categories for others.
I added some of these to the exclude list, then did a save and apply, but after it finished processing, they were no longer listed. Is that normal? I could not find anything in the admin guide on this either.
I just copied and pasted them in and that's when I noticed too that sometimes the list wouldn't persist after saving. Obviously a bug in the GUI because I put them in directly like you mentioned and didn't have that problem. The file is /etc/snort/rules/exclude.rules
Thanks, editing it directly worked. Now they show up in the GUI too, and I did an apply... of course that wiped them all out again.
I put them back in directly and reset the shield. The file was empty after the Shield rebooted. So I put them back in, and rebooted, again the file was cleared.
Thanks the editor you added is doing what it supposed to do but I just tried it and the GUI still wasn't saving it so there must be a bug somewhere else. Added directly to the file and it saved with no problems.