Rich data, no data entry
Collect identity, network, protocol, interface, port, and topology details directly from devices instead of typing them in by hand.
Open-source asset management and discovery
Build a detailed OT inventory without manual data entry.
OTserver automatically discovers connected devices and populates their IP and MAC addresses, vendor, model, firmware, protocols, interfaces, ports, topology, and more.
One trustworthy inventory
Discover once. Populate the inventory automatically.
Run the scanner or import existing discovery results. OTserver turns the collected evidence into useful asset records, correlates them by normalized MAC address, and preserves stronger data and human decisions.
Quality-aware merging
Human edits remain authoritative while higher-quality discoveries improve weaker data.
Scoped roles and history
Grant site-level read or write access and retain an immutable, secret-redacting audit log.
Built from the real product
Manage the inventory without losing the evidence.
OTserver Otter — read-only discovery
Find more than a list of IP addresses.
Our scanner is called OTserver Otter: like an otter diving beneath the surface, it dives into the industrial network and brings device evidence back to the surface. It uses fixed read-only discovery requests for ARP, PROFINET DCP, S7, EtherNet/IP, BACnet, Omron FINS, Niagara Fox, DNP3, IEC 61850, OPC UA, SNMP, and LLDP to build rich device evidence automatically, and requires explicit authorization before every scan.
Explore supported protocolsRead the Otter guide
OTserver Otter on GitHub
Run it yourself or let us manage it
Start with the open-source release.
Deploy OTserver on your own infrastructure. Both repositories are developed in the open: the OTserver application and the OTserver Otter scanner. For the enterprise version or managed hosting, talk to us.