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The OnSight vCollector is a lightweight appliance that functions similarly to our public monitoring nodes, which runs uptime checks and synthetic monitoring against your publicly available servers and web endpoints. However, the OnSight vCollector sits within your private network and monitors resources that are not publicly exposed. The OnSight can run uptime and synthetic checks on your private infrastructure, monitoring things like RDP, database connectivity, and port availability.

The OnSight can also function as a proxy for servers that have the Server Agent installed but have no outbound connectivity. Also, the OnSight can monitor network devices, storage arrays, VMWare clusters, and private network-managed cloud resources such as RDS and DynamoDB.

The OnSight is a collection of Docker containers that provide the necessary services. During the installation of the OnSight, if Docker is not found on the target machine it will automatically be installed.

System requirements

OS requirements

The OnSight vCollector supports the following Linux distributions:

  • Debian 9 and 10

  • Ubuntu Server 18.04 LTS, and 20.04 LTS

  • Redhat Enterprise 7.x and 8-8.3

  • CentOS 7.x and 8-8.2

  • Oracle Enterprise Linux 7.0

  • Amazon Linux 2 and 2018.03


Please note that podman should not be installed already on the OS. We utilize only Docker currently. Our installation process will install it if it's not found.


The docker SNAP package requires additional configuration that may be environment dependent. We currently only support the package installation. If the SNAP version was installed during installation, you should remove it and install the package using your package manager.

Resource requirements

These are the minimum resources required to install the OnSight.

  • Processor: 4 cores

  • Memory: 8 GB

  • Hard disk space: 50 GB


For larger deployments involving a significant number of network devices or advanced synthetic checks, please contact our support team to help determine the resource requirements for your environment.

Network connectivity requirements

The host machine must have outbound access to the following:



Used for


Primary and fail-over communication with the FortiMonitor cloud

443, 80

OnSight software updates


OnSight software updates



Docker download and installation

The host machine must have inbound access to the following ports allowed:






Used to SSH into host



Used to configure the OnSight as a proxy for agents



Used for SNMP Trap receipt



Used for NCM console

Deployment methods

Installation Method

Best for

One-liner installer

You're comfortable operating in a Linux environment
You have a specific server image you want to conform to
You have an available Linux VM


You're deploying the OnSight in an AWS environment
You're looking for the simplest cloud deployment method

Virtual image

You prefer a "black box" deployment
You have the available resources to allocate to a VM
You'd like to deploy on the HyperVisor of your choosing

On this page

Table of Contents

See also

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