The server address is play777.arbtserver.net, port 19132 for Minecraft and port 28777 for rust.
Minecraft Bedrock Edition
(formerly Pocket/Win10 Edition)
Click “Play”, then the “Servers” tab, then the “Add New Server” button. Make the following screen match this:
Note: You are now required to have a Microsoft/XBox Live account to connect to the server.
To connect in game, you can either search “ARBTServer” in the community listings (doesn’t always work) or hit F1, then type “client.connect play777.arbtserver.net:28777”