Highlights

Platform limitation for Siemens LPE

In Nozomi Networks Operating System (N2OS) v25.2.0, previously identified stability issues that could cause Remote Collectors to stall during reboot have been addressed. As a result, N2OS v25.2.0 resumes official support for Siemens LPE.

Expanded Discovery with new strategies

We have added support for Moxa, CODESYS, and AutomationDirect Productivity. Enhanced Smart Polling strategies. simple network management protocol (SNMP) now reports:

Linux packages
LLDP data, and
Asset information

MELSOFT now detects iQ-R-connected devices. Bently Nevada output now matches passive detection.

Sensor port configuration enhancements

Two major improvements have been introduced to give users greater flexibility in configuring sensor ports:

Support for active monitoring on non-MGMT ports

Users can now designate ports other than the MGMT port as active ports, enabling them to perform:

Smart Polling
Discovery, and
Remote Collector (RC) connections

This enhancement allows sensors to actively monitor and interact with network segments that are typically unreachable from the MGMT interface, especially in segregated or isolated environments.

Note:

These active ports are function-limited for your security. Even though ports can become active, they do not expose services such as the web user interface (UI) or secure shell (SSH) (port 22). The only exceptions are: port 6000 and Sync API over port 443 which are mandatory for Remote Collector (RC) connectivity. Only the designated MGMT port allows these services and administrative access. For more details, see the documentation.

Flexible MGMT Port Assignment

Users can now designate any port on the sensor as the MGMT port. This provides crucial flexibility for users whose management networks rely on fiber.

This enhancement significantly improve sensor deployment flexibility and help users align their network topology with operational and security needs.

Note:

Changing MGMT or active port roles can temporarily disrupt connectivity. The system automatically transfers MGMT configuration when a new MGMT port is selected. Only one MGMT port can be active at any time. The previously assigned MGMT port is demoted and shown as mgmt_oem and it no longer has an internet protocol (IP) address. Virtual interfaces remain out of scope for this feature. For more details, see the documentation.

Important considerations

The system will warn users about potential network disruptions. However, because changing MGMT and monitoring port settings with this new feature could affect connectivity and functionality, you must plan carefully if you use one of these configurations:

Guardians with monitoring ports configured as MGMT ports for running Smart Polling on devices from segregated networks
Guardians and Central Management Console (CMC)s  with advanced network configurations such as LACP/load balancing or other advanced network configurations

Users without advanced network configurations can immediately benefit from these new features. Those with complex network configurations are encouraged to plan changes carefully to ensure uninterrupted connectivity. For the best experience, we recommend that you use a serial connection when configuring sensors. If network interruptions occur, serial access remains available as a reliable alternative.