If your proxy server settings are acting up, try flushing your DNS cache. Open cmd and type `ipconfig /flushdns`. Sometimes old DNS records mess with the connection.
Also, test with a different proxy server to see if the issue is with your settings or the server itself.
For tools, Wireshark can help trace where the connection fails.
Also, test with a different proxy server to see if the issue is with your settings or the server itself.
For tools, Wireshark can help trace where the connection fails.