This release refines pre-configured sensors for native cloud infrastructures and virtualization platforms:

[ PRTG Core Server ] <--- HTTPS ---> [ User Interfaces ] (Database & Web Server) (Web, Desktop, Mobile) | | (Secure SSL Port 23560) v [ Distributed Probes ] ---> Monitors Local & Remote Subnets via: (Local & Remote Probes) - SNMP, WMI, Ping, Flow, API The Core Server

Enhanced CloudWatch integration for EC2, RDS, and S3.

Email the helpdesk immediately, but text the IT Director if the issue persists for 30 minutes. 3. Architecture and Deployment Strategies

For distributed IT environments, ensure remote probes are used to manage load and provide local monitoring capabilities.

: Users can now select single bits of input and holding registers to monitor industrial devices more precisely, such as tracking the on/off status of multiple inputs reported as a single register.

This paper was prepared for academic and technical evaluation purposes. Version specifics are accurate as of PRTG 21.0.66.0.

These 21.x updates continued the practice of continuous, automated improvements, moving away from a model of infrequent, massive updates to a faster, more responsive release cycle. This continuous rollout strategy means that users of PRTG 21.0.x were, and still can be, automatically and seamlessly enhanced with new features and fixes. Paessler also provided, and continues to provide, detailed release notes for the stable channel, allowing administrators to track changes comprehensively.

21.x versions began the transition toward Kerberos authentication for WMI sensors , responding to Microsoft's push to phase out older NTLM protocols. Why This Version Mattered