How I build secure (and VPN-less!) industrial IoT connectivity

The text details the implementation of ngrok to secure and simplify remote access to smart factory networks, which are often plagued by complex firewall configurations and outdated VPN setups. By deploying a single ngrok agent per factory, the solution provides a universal gateway for secure ingress to essential services, such as telemetry APIs, sensor databases, and web dashboards, without exposing them to the public internet. Internal endpoints allow factory services to be accessible within ngrok’s private network, while cloud endpoints manage external access for cloud apps, enhancing security and reliability. The setup dynamically controls access, with the ngrok agent managing tunnels and running as a persistent background service, ensuring security and continuous uptime. The architecture supports scaling across multiple factories while requiring minimal installation efforts and integrates with Azure AD and mTLS for additional security.

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