Global – October 27, 2026 -- The taosX gRPC interface in TDengine TSDB Enterprise is unencrypted by default, so teams collecting OPC UA data across network zones must explicitly enable and verify TLS, according to TDengine's security documentation. The point is part of a wider OT/IT integration checklist: a working OPC UA client beside the server proves only that the endpoint and credentials work locally, not that the same path should be opened from an enterprise historian into the control network.