Blocking a domain is not working correctly

[Schubladenzieher]

I've installed an App Store app that's continuously querying outgoing connections. I'm blocking the individual IP addresses using Lulu. But isn't there an easier way to block the domain/reverse DNS to finally stop it? The IP addresses have the hostname ecs-x-xx-xx-xxx.compute.hwclouds-dns.com (where each x represents a number). Do I need to create a rule and enter .+\.compute\.hwclouds-dns\.com as the domain and then block it, as shown in the screenshot? Or what exactly do I need to do? Because even with this method, connections are still being queried.

Thank you very much! @objective-see

[objective-see]

As noted in #821, LuLu cannot block reverse DNS (as its not part of the information given to it by the OS, at the time of the connection).