Since downloading ARC I’ve received 5 security risk notices from my internet provider (Comcast Xfinity) stating separate attempts to access my Nucleus. I never had a single notification prior to ARC. I did not change any Modem/Router settings during ARC setup. What gives?
Arc needs access to your core from outside and if you have UPnP enabled on your router it will auto configure to allow this. If you have used arc from outside your house then it will have had a remote connection and your routers doing its job informing you of activity from outside