Hello @meaton, thanks for your response and sorry for the confusion - I mixed up some things here: The issue I mentioned with the Proxifier application is another one - the Proxifier team opened up a new thread for that: https://developer.apple.com/forums/thread/666894 What listening ports are you not seeing working when NETransparentProxyProvider is up and running on Big Sur? I think I'm not missing any listening ports on my side but I'm trying to provide you some feedback here. Best regards, Manuel

Update: It seems that the mentioned issues were already reported to your teams: proxifier.com/download/bigsur 2nd Update: I just found out that the Proxifier team created this feedback and it seems that the issue wasn't resolved yet. Hello Matt, was this issue resolved with the public release of macOS Big Sur 11.0.1? We are having similar issues (as far as I can tell) when using the Proxifier application: Proxifier v3 uses the new Network Extension API in macOS Big Sur - in case the Proxifier application is running I'm not able to establish other internet-based connections in tools like Cisco WebEx or fetching information from Git repositories using SSH. I was in discussion with the Proxifier support team and they assume that the Network Extension API could be the cause here - it seems that two applications are not able to use the Network Extension API at the same time. Is the team aware of those issues or do you need further information to investigate? Thanks, Manuel