![]() ![]() Click on that, watching the output of your SSH tunnel. Further down the list you see Localhost 8545. If you do, MetaMask connects to an Infura node, defeating the entire purpose of this long journey. That’s our final destination, but we don’t want to use that menu item. Click on that name and you see a dropdown menu. If you’ve been using beta dApps, it’s probably say something like Rinkeby Test Network. At the top of the MetaMask window is the currently-chosen Ethereum network. In your browser, activate MetaMask by clicking on the fox head at the top right of your browser window. I’m assuming you left the SSH tunnel running and that you can see its log output. This is the easiest part of the whole tunnel kerfuffle. Your node is safe from exploits due to an exposed RPC port. That's the most important point: nobody else can do this except you. The rest sets up the tunnel itself, specifying that anything your local machine receives on port 8545 (the port on which your node is listening for RPC requests) should be forwarded to the same port on your node securely through the tunnel. We then supply the username and IP address in order to log into our VPS. The -v switch makes ssh output some logging information as it executes. There's no command to execute remotely at this point. We want a continuous connection, or tunnel, to our node. The -N switch tells ssh not to execute a remote command. This command is identical on all three platforms. ![]() The following command sets up the SSH tunnel. We’re going from here with the assumption that you have command-line access to an ssh client. If you have an older version of Windows there are several utilities available that will provide SSH capabilities. Permanent ssh tunnel windows 10#If you have Windows 10 but OpenSSH is not installed, follow the instructions in this Microsoft article. OpenSSH was already installed and available from cmd.exe. To check the state of SSH on Windows at the time of writing I downloaded the latest Windows 10 ISO and installed it into a virtual machine. ![]() This provides ssh.exe as well as several other SSH utilities. SSH on WindowsĪs of the April 2018 update, Windows 10 has OpenSSH installed by default. Make a note of that IP we'll be using it shortly. You should see your node’s IP address on the right, just below the geographic location of your VPS. This is determined by returning to your Linode dashboard and going to the Linodes tab on the left. In order to forward requests to your VPS you’ll need to know its IP address. It'll become clear why we need this when we set up MetaMask later. I won’t go into details here, but in effect, it allows requests made to your local machine to be forwarded automatically to another machine, in this case the VPS running your geth node. Setting up a what? This is the confusing process I mentioned earlier. Permanent ssh tunnel how to#In this second part, we explore secure remote access to this Ethereum node via MetaMask.We also cover how to make everything survive crashes and shutdowns. Permanent ssh tunnel install#In the first part of this series, we learned how to install and synchronize a geth node with the Ethereum blockchain on a Linux Virtual Private Server (VPS). ![]()
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