---
title: "Infrasense - Passive"
canonical: "https://thoughtdata.refined.site/space/TUD/55186530/Infrasense%20-%20Passive"
format: markdown
---
## Infrasense - Passive

Passive Infrasense sensor requires a dedicated system to perform its core functions. It communicates remotely with all application servers and network devices in the network to obtain all data for its core functions. 

The passive Infrasense sensor  

- involves a one-time installation and configuration of Infrasense software.
- can be deployed on dedicated physical hardware machine or on a virtual machine running on any hypervisor/computing node in any public cloud.

**Note**: ThoughtData recommends the passive Infrasense sensor deployment for ease of  installation, set-up  and usage.

Passive Infrasense supports 3 methods for remotely polling key infrastructure performance statistics from application servers/network devices.

- SSH(Secure Shell) : SSH is used for polling remote statistical information from all Linux based devices/servers. In this method a pre-configured credentials in Enterprise360 are used to communicate with the devices/servers. Prerequisite:  SSH Port 22 has to be open on all Linux servers and also on all firewalls.

- SNMP(Simple network management protocol) : SNMP is used for polling remote infrastructure performance statistical information from any Linux/windows server or network device. The servers or devices has to support SNMP method for polling information and SNMP agent/service has to be enabled and started. Prerequisite:  SNMP/UDP Port 161 has to be open on devices used for monitoring and also on all firewalls in between. In this method a pre configured SNMP community string is used to communicate with the SNMP enabled device.
- WMI :  WMI(Windows management instrumentation) is an optional method used for polling remote statistical information from all windows based servers. In this method a pre configured user credential in Enterprise360 is used to communicate with the windows devices/servers. Prerequisites:  WMI has to be enabled and running on windows servers(refer to your respective windows server guides how to enable and run WMI).  

        Port 135(for WMI) and port 5985(for WinRM)  has to be open on all windows servers and also on all firewalls.  

        The credentials configured in Enterprise360 for the windows server should be a Windows administrator or should have WMI privileges enabled

**Note**: A Linux based passive Infrasense sensor can not communicate or poll a windows based server using WMI. For this you would need a separate windows based passive Infrasense sensor. This is only required if you choose to go with WMI option for monitoring Windows based devices/servers.

 

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| Requirements for the Infrasense passive sensor... |
| ##### Operating System | Linux Ubuntu 20.04 LTSR Server(Recommended and Tested) |
|  | Windows 10 professional or 2016 or above for server(Required only in case of         WMI option) |
| ##### Monitoring technology options | > Macro (nested-table) |
| ##### Hardware/Virtual Machine | 4CPU, 16GB RAM 500 GB HDD(Minimum) |

 Common requirements for physical/virtual sensor deployments

***Note****: Infrasense Passive Windows can only monitor a Windows based device/server. Infrasense Passive Linux however can monitor a Linux based device/server using SSH/SNMP and also a Windows based device/server using SNMP. Infrasense Passive Linux however cannot monitor a Windows based server network using WMI.*