windows-itpro-docs/windows/security/threat-protection/microsoft-defender-atp/linux-static-proxy-configuration.md

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Microsoft Defender ATP for Linux static proxy discovery		Describes how to configure Microsoft Defender ATP for static proxy discovery.	microsoft, defender, atp, linux, installation, proxy	eADQiWindows 10XVcnh	met150	w10	deploy	library	security	dansimp	dansimp	medium	dansimp	ITPro	M365-security-compliance	conceptual

Configure Microsoft Defender ATP for Linux for static proxy discovery

Applies to:

• Microsoft Defender Advanced Threat Protection (Microsoft Defender ATP) for Linux

Microsoft Defender ATP can discover a proxy server using the HTTPS_PROXY environment variable. This setting must be configured both at installation time and after the product has been installed.

Installation time configuration

During installation, the HTTPS_PROXY environment variable must be passed to the package manager. The package manager can read this variable in any of the following ways:

• The HTTPS_PROXY variable is defined in /etc/environment with the following line:

  HTTPS_PROXY="http://proxy.server:port/"
  

• The HTTPS_PROXY variable is defined in the package manager global configuration. For example, in Ubuntu 18.04, you can add the following line to /etc/apt/apt.conf.d/proxy.conf:

  Acquire::https::Proxy "http://proxy.server:port/";
  

  Caution

  Note that above two methods could define the proxy to use for other applications on your system. Use this method with caution, or only if this is meant to be a generally global configuration.

• The HTTPS_PROXY variable is prepended to the installation or uninstallation commands. For example, with the APT package manager, prepend the variable as follows when installing Microsoft Defender ATP:

  $ HTTPS_PROXY="http://proxy.server:port/" apt install mdatp
  

  Note

  Do not add sudo between the environment variable definition and apt, otherwise the variable will not be propagated.

The HTTPS_PROXY environment variable may similarly be defined during uninstallation.

Note that installation and uninstallation will not necessarily fail if a proxy is required but not configured. However, telemetry will not be submitted, and the operation could take significantly longer due to network timeouts.

Post installation configuration

After installation, the HTTPS_PROXY environment variable must be defined in the Microsoft Defender ATP service file. To do this, open /lib/systemd/system/mdatp.service in a text editor while running as the root user. You can then propagate the variable to the service in one of two ways:

• Uncomment the line #Environment="HTTPS_PROXY=http://address:port" and specify your static proxy address.

• Add a line EnvironmentFile=/path/to/env/file. This path can point to /etc/environment or a custom file, either of which needs to add the following line:

  HTTPS_PROXY="http://proxy.server:port/"
  

After modifying the mdatp.service file, save and close it. Restart the service so the changes can be applied. In Ubuntu, this involves two commands:

$ systemctl daemon-reload; systemctl restart mdatp