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Copy file name to clipboardExpand all lines: defender-endpoint/linux-support-offline-security-intelligence-update.md
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- mde-linux
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ms.topic: conceptual
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search.appverid: met150
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ms.date: 02/07/2025
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ms.date: 03/28/2025
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---
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# Configure offline security intelligence update for Microsoft Defender for Endpoint on Linux
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Once the script is executed, the latest signatures get downloaded to the folder configured in the `settings.json` file (`updates.zip`).
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Once the signatures zip is downloaded, the mirror server can be used to host it. The mirror server can be hosted using any of the HTTP/HTTPS/network share servers.
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Once the signatures zip is downloaded, the mirror server can be used to host it. The mirror server can be hosted using any of the HTTP/HTTPS/network share servers, or a local/remote mount point.
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Once hosted, copy the absolute path of the hosted server (up to and not including the `arch_*` directory).
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For example, if the script is executed with `downloadFolder=/tmp/wdav-update`, and the HTTP server (`www.example.server.com:8000`) is hosting the `/tmp/wdav-update` path, the corresponding URI is: `www.example.server.com:8000/linux/production/`.
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We can also use the absolute path of directory (local/remote mount point) like `/tmp/wdav-update/linux/production`.
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> [!NOTE]
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> For example, if the downloader script is executed with `downloadFolder=/tmp/wdav-update`, and the HTTP server (`www.example.server.com:8000`) is hosting the `/tmp/wdav-update` path, then the corresponding URI is: `www.example.server.com:8000/linux/production/` (verify that this within this directory, there are the `arch_*` directories).
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>
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> We can also use the absolute path of directory (local/remote mount point). For example, if the files were downloaded by the script into a directory `/tmp/wdav-update`, then the corresponding URI is:`/tmp/wdav-update/linux/production`.
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Once the mirror server is set up, we need to propagate this URL to the Linux endpoints as the `offlineDefinitionUpdateUrl` in the Managed Configuration as described in the next section.
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Once the mirror server is set up, we need to propagate this URI to the Linux endpoints as the `offlineDefinitionUpdateUrl` in the Managed Configuration as described in the next section.
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## Configure the endpoints
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|`automaticDefinitionUpdateEnabled`|`True`/`False`| Determines the behavior of Defender for Endpoint attempting to perform updates automatically, is turned on or off respectively. |
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|`definitionUpdatesInterval`| Numeric | Time of interval between each automatic update of signatures (in seconds). |
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|`offlineDefinitionUpdateUrl`| String | URL value generated as part of the mirror server setup. This can be either in terms of the remote server URL or a directory (local/remote mount point). |
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|`offlineDefinitionUpdateUrl`| String | URL value generated as part of the mirror server setup. This can be either in terms of the remote server URL or a directory (local/remote mount point). See the previous section for information about how to specify this path.|
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|`offlineDefinitionUpdate`|`enabled`/`disabled`| When set to `enabled`, the "offline security intelligence update" feature is enabled, and vice versa. |
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|`offlineDefinitionUpdateFallbackToCloud`|`True`/`False`| Determine Defender for Endpoint security intelligence update approach when "offline mirror server" fails to serve the update request. If set to `true`, the update is retried via the Microsoft cloud when "offline security intelligence update" failed; else, vice versa. |
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|`offlineDefinitionUpdateVerifySig`|`enabled`/`disabled`| When set to `enabled`, downloaded definitions are verified on the endpoints; else, vice versa. |
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