The macOS Finder provides a variety of easy server connection options. Here's how to use the Connect to Server window in Finder to easily mount and use remote network volumes as if they were local ...

Connecting to FTP in the Finder In macOS's Finder you connect to an FTP server by using the Go->Connect to Server menu item in the Finder's menu bar at the top of the display.

Peter Lubbers makes an introduction to HTML5 Web Sockets explaining how they interact with proxy servers, and what proxy configuration or updates are needed for the Web Sockets traffic to go through.

If the server is a Windows-based machine, begin the IP address or hostname with the "smb://" prefix. Click on the "Connect" button to initiate a connection.