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OpManager is intended for business/ educational/ public sector network environments. If you are a home user, download the free version (monitors 10 devices).

Read and accept the License Agreement before downloading this software.
OpManager Version 8.5
Windows Installer (32bit) | 40 MB
NetFlow Plug–in
Download Netflow Plug-in
NCM Plug–in
Download NCM Plug-in
Have trouble during installation or setup? Please refer to OpManager Troubleshooting guide.

OpManager is available in English, Spanish, Chinese Simplified, Chinese Traditional, Japanese, French, German, and Italian languages.

FAQs
No, the trial edition comes with all functionalities and can monitor up-to 500 devices. If you need to monitor more number of devices, please request a license.
Please refer to the System Requirements page.
Yes absolutely. Install a 30-day trial version and register yourself during installation to avail free technical support during evaluation period.
OpManager is licensed based on the number of monitored devices. Any device that responds to an ICMP ping can be monitored using OpManager e.g. Routers, Switches, Firewalls, Servers, UPS, printers. In a virtualized environment, every virtual instance is considered as a seperate device for both monitoring and licensing purposes.
Yes, you can get the Failover add–on for Professional/ Essential Edition. Infact Essential and Deluxe editions are economical editions that have various add–ons and plug–ins bundled. You can topup OpManager Professional or Essential Edition with the desired add–ons/ plug-ins. For the detailed list of OpManager Add–ons and Plug–ins Click here.
No, all ManageEngine products are licensed through a registered XML file. One can simply apply the license and use the same OpManager instance in production environments. One can even move the data to a different server if needed.
No, it is absolutely free. All you need to do is, ensure you have paid the Annual Maintenance and Support fee.
No. The license is restricted to a single installation of OpManager and not a consolidated license for the enterprise. In such a case you will have to buy separate license for each locations.
OpManager is an agent-less monitoring and management tool that uses a wide variety of protocols and technologies: ICMP, SNMP, WMI, CLI (Telnet/ SSH), TFTP, SCP. OpManager also includes a Syslog demon, SNMP Trap listener and Flow collectors for NetFlow, sFlow etc.. All these and more bring together many network performance monitoring and management capabilities within OpManager.
OpManager supports out-of-the-box over 100 vendors. To list a few: 3Com, Cisco, DELL, HP, D-Link, Extreme, Fortigate, Foundry, Juniper, Netgear, Netscreen, Nortel, Linux, Solaris, HP-UX, IBM-AIX, Microsoft Windows, APC, Libert.
Though OpManager is licensed based on number of device scalability has to be measured interms of Interfaces.

The OpManager polling engine can monitor upto 10,000 Interfaces. However this depends on the system hardware, polling frequency and type of devices. The OpManager Distributed Edition can monitor upto 50,000 interfaces. To know the exact number of interfaces monitored by your OpManager installation, refer to the “About” page in the product(top right-hand side).
No, but OpManager integrates with ManageEngine products viz. ServiceDesk Plus, Firewall Analyzer, Applications Manager, NetFlow Analyzer and Device Expert. See more on OpManager Integration.
Yes, you can install OpManager on any Linux server viz. RedHat 7.x and above, Debian 3.0, Suse, Fedora, Mandrake. However NetFlow and NCM plug–ins supports only Windows OS and doesn’t support Linux.

Note: Installing OpManager on a Linux server will disable all WMI based monitors.

I still have some questions which needs clarification!
If you have any questions about OpManager, feel free to raise a support request and we’ll get back to you.
See OpManager Editions and Pricing

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ManageEngine OpManager - Network Monitoring Software: Powerful network management made easy and affordable.