Antivirus

The University of Nebraska offers Cortex XDR by Palo Alto to protect computers and data against malicious attacks, viruses and malware.

Features

Palo Alto Cortex XDR is part of a suite of security tools installed on University computers by IT support staff. Cortex complements native antivirus and malware services such as Windows Defender and macOS XProtect & Gatekeeper. These services work together to prevent viruses, trojans, worms, and other malicious software from infecting your computer and spreading across the University network.

UNL offers endpoint protection services for all University-owned computers, as well as personally-owned computers for UNL students, faculty, and staff.

Employees should contact their IT support representative for assistance with the installation of Cortex. 

Students, faculty, and staff may download the personal version of Cortex for installation on home computers from this page.

***NOTE: If your University computer is managed by ITS Endpoint Management Services or by your department tech, endpoint protection will be installed for you.

Getting Started

Before you begin: These instructions and the provided installer are intended for personally owned devices. If you have a University-owned device, please contact your IT support person or the Help Center at support@nebraska.edu. Uninstalling third-party antivirus products is recommended before installing and configuring these security tools.

First, to download the correct installer for your computer, determine whether your computer is running on 32bit or 64bit.

  1. Open the "About" system setting by right clicking the Start button and selecting "System".
  2. Under "Device specifications" in "About", look for your version under "System type".

To Install Cortex XDR:

  1. After the file has been downloaded, double click to run.
  2. It will unzip the files and start the install.
  3. After the installation is complete, restart your computer.

To Enable Defender Quick Scans on Windows 10:

  1. In the Windows search bar type "Virus & threat protection" and open the resulting Virus & threat protection system settings.
  2. Click on "Windows Defender Antivirus options".
  3. Toggle Periodic Scanning "On" and click "Yes" on the resulting User Account Control prompt from Windows.

Before you begin: These instructions and the provided installer are intended for personally owned devices. If you have a University-owned device, please contact your IT support person or the Help Center at support@nebraska.edu. Uninstalling third-party antivirus products is recommended before installing and configuring these security tools.

Step 1: Install the Cortex XDR agent software

  1. Download Mac version of Cortex XDR
  2. Double click the zip to extract the folder.
  3. Then double click "Cortex XDR.pkg" to start the install. This package must remain in the same folder as the "Config.xml" file for the installation to complete sucessfully. 
  4. If presented with the message: "Installer would like to access files in your Downloads folder." select "OK".

Step 2: (macOS 10.15 or later) Approve Cortex XDR System Extensions

  1. When installing the Cortex XDR agent on a Mac running macOS 10.15.4 or later, this warning displays twice: first for the Security Extension and then for the Network Extension. However, in both warnings, the operating system displays System Extension Blocked. Select “Open Security Preferences”



  2. In System Preferences > Security & Privacy > General, click “Details”.



  3. Select both Cortex XDR System Extensions and click “OK” to allow them. Ignore the message informing that “The system needs to be restarted before it can be used” since this step is not required.



  4. (macOS 10.15.4 or later) Approve Cortex XDR Web Content Filter. Click “Allow” to enable the Cortex XDR agent to monitor network events.



Step 3: (macOS 10.15 or later) Grant full disk access.

Due to changes in the security settings of macOS 10.15, you must allow the Cortex XDR agent full disk access on your endpoint to enable full protection. If you do not authorize the agent full disk access on your endpoint, the agent provides only partial protection of files in the /Applications directory.



  1. Go to System Preferences > Security & Privacy tab, and select “Full Disk Access”
  2. To make changes, click the padlock icon on the bottom left and enter your credentials, and Unlock.
  3. Check the box next to “pmd” and “TrapsSecurityExtension”.



 

Before you begin: These instructions and the provided installer are intended for personally owned devices. If you have a University-owned device, please contact your  IT support person or the Help Center at support@nebraska.edu. Uninstalling third-party antivirus products is recommended before installing and configuring these security tools.

Note: Cortex XDR is currently supported on the following Linux distributions: Amazon 2, Redhat 7, Redhat 8, Ubuntu 14, Ubuntu 16, Ubuntu 18, Ubuntu 12, Centos 7, Centos 8, Debian 9, Oracle 7, Oracle 6, Oracle 8, Suse 15, Suse 12. For more information, see: Cortex XDR for Linux Requirements.

  1. Download the Cortex XDR Linux installer script.
  2. Open a Terminal window and change your directory to the location of the install script. Example: cd ~/Downloads
  3. With elevated privilages, run the script. Example: sudo sh Personal_Cortex_702_Linux.sh

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