- Industrial and IoT protocols often have no authentication: never expose them to the Internet.
- Segment OT networks from IT and use protocol-aware firewalls.
- Monitor with an ICS-aware intrusion detection system.
IoT & industrial (ICS) ports
MQTT, CoAP, Modbus, S7, BACnet, DNP3 and other OT protocols. 30 ports, most common first.
Securing iot & industrial (ics) services
Other port categories
Web /tools/ports/category/web Remote access /tools/ports/category/remote-access File transfer & sharing /tools/ports/category/file-transfer Email /tools/ports/category/email Databases & caches /tools/ports/category/databases Directory & authentication /tools/ports/category/directory-auth Network services /tools/ports/category/network-services VPN, tunnels & proxies /tools/ports/category/vpn-tunnels Messaging & queues /tools/ports/category/messaging Voice & chat /tools/ports/category/voice-chat Media & streaming /tools/ports/category/media DevOps, cloud & containers /tools/ports/category/devops Monitoring & logging /tools/ports/category/monitoring Gaming /tools/ports/category/gaming Other services /tools/ports/category/other