Everything you need to setup and use the Ardexa Tunnel

What is a "tunnel"?

In computing a "tunnel" is where a remote service or computer, that would otherwise not be accessible, is made available to a local network.

Your Ardexa device provides this through the following tab:

MENU: > [DEVICES] > (select device) > [TUNNEL]

The example that most people are familiar with is the Virtual Private Network or VPN. This allows you to "tunnel" from you workplace network into another remote network via a secure tunnel. However a VPN is not always required and in fact may provide too much access to the remote network creating a security risk.

Let's say there is a web server running at a remote plant that I wish to access. I could use a VPN, but this is overkill and creates an unnecessary link between my local network and the remote one. If my laptop has a virus then I have now put my remote secure network at risk. Instead I want to access ONLY the web server, not the entire network. This is where the Ardexa TUNNEL feature can help.

The Ardexa TUNNEL is a "port-to-port" connection, meaning that the two networks are never directly connected, therefore, there is no chance of a virus slipping into your secure network. Any TCP-based protocol can be tunnelled and all remote access can be restricted by user, port and/or remote host (IP address).

Examples of supported protocols include:

  • HTTP (web)

  • HTTPS (secure web)

  • RDP (Windows Remote Desktop)

  • VNC

  • SSH

  • Modbus TCP

  • FTP

  • Telnet

  • OPC UA