The page below is from the manual of PRTG, our quick-to-install and easy-to-use network monitoring software
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Aurelio, System Admin at Paessler AG
PRTG Manual: System Requirements
PRTG Network Monitor consists of two main system parts, the PRTG core server and one or more probes (for details, see section Architecture and User Interfaces). If you want to use PRTG on premises, you need to install the PRTG server on a computer that meets the System Requirements for PRTG Core Server (PRTG on Premises). If you want to use PRTG on demand, you need to install at least one remote probe on a computer the meets the System Requirements for PRTG Remote Probes.
System Requirements for PRTG Core Server (PRTG on Premises)
To install a PRTG on premises server and work with it, you need to meet the following requirements:
- A current PC or server with at least a dual core CPU and a minimum of 2048 MB RAM memory is sufficient for the PRTG server.
- We recommend that you use the operating system Microsoft Windows Server 2012 R2 for best performance.
- A web browser to access the web interface. The following browsers are supported:
- Google Chrome 57 or later (recommended)
- Mozilla Firefox 52 or later
- Microsoft Internet Explorer 11
PRTG on demand does not require any hardware for the PRTG server, but at least one remote probe installation is necessary to monitor your local network when using PRTG on demand.
System Requirements for PRTG Remote Probes
You can extend your monitoring by installing one or more Remote Probes . A remote probe installation is required to monitor your local network with a PRTG on demand instance. Remote probes also allow you to monitor different sub-networks that are separated by a firewall from your PRTG on premises core server, to keep an eye on remote locations, and are useful in several other scenarios.
- Hardware
A current PC or server with at least a dual core CPU and a minimum of 2048 MB RAM memory is sufficient for remote probes. - Operating system
We recommend that you use the operating system Microsoft Windows Server 2012 R2 for best performance. Microsoft Windows 7 and Microsoft Windows 10 are also good options for remote probes.
- Stable network connection
Remote probes require a stable network connection between the PRTG server and the remote probe. Remote probes that connect to a PRTG on demand server need a reliable internet connection. Unstable connections, for example via 3G, might work but it is possible that you lose monitoring data if the connection is non-reliable.
Planning a PRTG on Premises Installation With Hundreds of Sensors or More?
The maximum number of sensors you can monitor with one PRTG on premises installation mainly depends on the monitoring technology and the monitoring intervals you use. In general, we recommend that you use a dedicated physical machine to run both the PRTG core server and PRTG remote probes. For more information, please see section Detailed System Requirements .
PRTG on demand is restricted to max. 5,000 sensors, more sensors are not possible. This number of sensors is available in the PRTG-5000 subscription.
More
Paessler Website: System Requirements for PRTG Network Monitor—Recommended Setup for Most PRTG Users
Knowledge Base: Planning Large Installations of PRTG Network Monitor
Knowledge Base: How can I speed up PRTG—especially for large installations?
Knowledge Base: Checklist for Running PRTG on VMware
Knowledge Base: Which ports does PRTG use on my system?
Knowledge Base: Which servers does PRTG connect to for Software Auto-Update, Activation, etc.?
Knowledge Base: Which .NET version does PRTG require?
PRTG on demand: Enter a New Era of Monitoring
