Designate a Site Concentrator (Optional)

The Site Concentrator reduces external network traffic by downloading and caching files requested by the various features (Managed Antivirus pattern files, Patch Management patches etc) to a centralized cache location. The Agents then retrieves the files from the Site Concentrator cache, ensuring that each file is downloaded only once.

By default, the Site Concentrator caches files for twenty eight or thirty days (depending on the version) in a sub-directory of the Advanced Monitoring Agent installation folder (normally C:\Program Files (x86)\Advanced Monitoring Agent).

Ensure all computers at the selected Site can reach the Site Concentrator over the specific port to retrieve the downloaded files. Where a firewall is running on the server or network it may be necessary to add an allow rule to permit the Agents to connect to the Site Concentrator over this port.

Setup the Site Concentrator

  1. Log into the Dashboard
  2. Expand the Client under the left Monitoring and Management tree
  3. Right-click on the target Site (or from the Edit menu go to Edit Site
  4. Choose Site Concentrator
  5. Populate the required information


    Select the server to install the Site Concentrator on


    Port other devices on the network will connect to when retrieving updates and patches from the concentrator. By default this is port 8123

    Open Windows Firewall

    Automatically open the local Windows Firewall on the specified port.

    Once setup, all downstream clients can use this feature without additional system configuration (supported from Windows Agent 10.5.1).

    Specify Cache Path

    Select an alternative drive and path for the Site Concentrator Directory (default is sub-folder in C:\Program Files (x86)\Advanced Monitoring Agent)

    Choose the Cache Drive from the drop-down then enter the Cache Path

    Note: Sufficient free space is required on the drive where the Site Concentrator is to cache files and we recommend at least 2GB.

    Upstream Proxy IP

    Where an upstream proxy is in use on the network, enter its IP address (supported from Windows Agent 10.5.1).

    When this setting is enabled, the Site Concentrator sends all of its traffic through the Upstream Proxy over the entered port.

    These Upstream Proxy settings are only applied to Site Concentrator traffic. They do not influence the traffic flows for Agent uploads and downloads.

    Upstream Proxy Port

    Upstream proxy's port

    Proxy Requires Authentication

    Secured environments may require an Upstream Proxy Username and Upstream Proxy Password

  6. Save to apply

Once submitted, the updated configuration settings are distributed to all Windows Monitoring Agents under this Site the next time they check in and the repository folder created on the selected Site Concentrator Device.

Edit or remove Site Concentrator

  • Log into the Dashboard
    1. Expand the Client under the left Monitoring and Management tree
    2. Right-click on the target Site (or from the Edit menu) click Edit Site
    3. Go to Site Concentrator
      • Edit: make changes. Select a different Device, reconfigure the settings.
      • Remove: Choose Device: No concentrator for this site to remove the concentrator for the Site. Where selected, all devices will connect directly over the internet to the file source.
    4. Save to apply

    Any Site Concentrator configuration changes are distributed to all Devices under that Site the next time their Agent checks in.

    Where the Site Concentrator Device changes or is removed, this is communicated to the Device previously assigned as the Site Concentrator and its cache folder deleted.


    Site Concentrator from Agent 9.8.2

    A new bespoke Site Concentrator was introduced from Windows Monitoring Agent 9.8.2, to replace the previous version.

    By default, the Site Concentrator installs to C:\Program Files (x86)\Advanced Monitoring Agent\concentrator\cache using the default port 8123 (both are configurable when setting up or editing the Site Concentrator) and runs as a Windows service (Advanced Monitoring Agent Site Concentrator).

    As the Site Concentrator acts as a caching proxy, it caches HTTP response documents and honors any cache-control, pragma or expires headers. Please note that SSL responses are never cached.

    Where the response document does not contain any cache-control, pragma or expires headers then it is stored for 1800 seconds (the default cache interval) with expired documents automatically deleted every 30 seconds.

    Files downloaded to the Site Concentrator that do not have a cache-control header are stored for 28-days then automatically deleted by the cleanup after this period once they are classed as expired. If an item contains a cache-control header, the item expired in accordance with this header, even if this is longer than 28-days.



    To prevent permissions problems please verify the Site Concentrator is accessible from the account Patch Management Windows Services run under.

    Refer to the Patch Management Prerequisites and System Requirements section for Operating System and Windows Update behavior information.

    Upgrade to 9.8.2 Site Concentrator

    As the 9.8.2 and earlier version of the Site Concentrator are incompatible, when upgrading to Monitoring Agent 9.8.2 or later the previous Site Concentrator and its cache folder are removed.

    A replacement cache folder is then created using the default location or Specific Cache Path (where configured) with any required files re-downloaded.

    Troubleshoot - Summary tab

    Where a Site Concentrator cannot upload due to upstream proxy issues, a message may be displayed in the Device's south pane Summary tab to help identify the issue. For example: Proxy error: Unable to connect through proxy server

    9.8.2 Known Issues: XP Site Concentrator Compatibility

    The following are known issues if using the Site Concentrator on a device running XP:

    • Files older than 28 days are not cleared
    • Changes to the cache path are not applied