Sometimes they work, and sometimes I have to close one or the other, or every connection gets blocked. I haven’t blocked anything from Proton VPN on Portmaster - just some Windows services and domains that don’t break the internet when Proton VPN is off.
Do you have any idea what may be happening or how I can discover what’s going on?
- both on the free plan.
Edit: I might have figured it out. It seems like they are fighting over DNS resolving. When I removed the DNS settings from Portmaster (it’s already set in the browser anyway), it started working again :)


A lot of those call-home processes can be blocked with your .host file. Additionally, PrivacySexy, WPD, and or O&OShutUp can help strip out all the crap. I hear a lot of people saying that updates to Windows revert the changes. I’m not sure if that is relevant to whether you are using Home or Pro. I use W10Pro and I have not seen any of my updates revert any of my changes. I believe Enterprise also doesn’t revert the changes upon updates. It might also be that major feature updates (like the 22H2 upgrade), may revert the changes, however, it’s fairly trivial to run PrivacySexy after the update.