Operating System: Mac OS X 10.14.4
The end user was experiencing internet connectivity outages randomly with Mail and Safari apps. Using the terminal I was able to ping google.com while other apps like Safari wouldn’t load any websites.
I noticed in the network settings that a Sock Proxy was enabled with localhost withport 8080. I knew this had to be the reason for the internet connectivity problem so I removed the setting and immediately was able to surf the internet again and receive email on the Mail app.
Just out of curiosity I reboot the Mac and the Sock Proxy settings came right back. I rebooted the Mac several more times and the Sock Proxy would re-enable itself every single time.
Google searches turned up questions about a Sock Proxy on Mac that would return after every reboot, but no real solutions.
Something was controlling a proxy on the machine and I knew it was coming from somewhere. After searching the file system I finally found it here /var/root/.mitmproxy
After removing this entire directory I was able to surf the internet and use the Mac Mail app without the network connectivity dropping.
I reboot the Mac several times after that and the Sock Proxy settings did NOT return.