Hallo,
I am using Comodo Internet Security since some years now. After I installed the last version in november, I encountered a problem with several firewall alerst from many applications. Destination is always 224.0.0.22 IGMP and the application can be anything. Outlook, explorer.exe, ordinary applications.
I am using “Custom Policy” Mode, so that Comodo does not create rules on its own. I tried adding a global rule. Allow IP (IGMP) from Internal to 224.0.0.0 / 255.255.255.0 but it does not work. I get a popup every some minutes for nearly every exe there is.