Set up a scheduled task on your internet-connected computer to run the Mirror Tool script every night. This ensures your USB drive transfers always contain the freshest definitions.
For individual users without access to the Mirror Tool, ESET provides offline update modules (legacy support varies by region and product version).
Computers that are physically separated from the internet.
Many corporate environments isolate critical servers from the internet to prevent external cyberattacks. Offline updates keep these systems secure without exposing them to the web.
: On the computer that is not connected to the internet, open your ESET product. Press F5 to access "Advanced setup." Navigate to Update > Profiles > Update Mirror . Click the toggle next to "Create update mirror" to enable it. Next to "Storage folder," click "Edit..." and set the path to the folder where you will place the downloaded files (e.g., C:\mirror\out ). Finally, verify that the toggle next to "Enable HTTP Server" is enabled. You can optionally configure a username, password, or port for security. Click **OK. eset offline update
Securing isolated, air-gapped networks requires specialized tools and a proactive approach. ESET’s robust offline update mechanisms—powered by the ESET Mirror Tool and ESET PROTECT—ensure that your critical infrastructure never has to compromise on security. By carefully planning your update pipeline, maintaining your offline licenses, and utilizing local repositories, you can keep your critical endpoints armed with the latest threat intelligence, no matter how remote or restricted they may be. Ready to secure your offline environment?
Offline updates usually require a specific offline license file to be uploaded during the Mirror Tool configuration.
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If you are setting this up, let me know the you use and if you are managing one machine or a whole network so I can provide the precise commands or paths. Share public link Set up a scheduled task on your internet-connected
Press on your keyboard to open the Advanced Setup tree in your ESET product. Click on Update in the left-hand menu. Expand the Profiles section and locate Updates .
MirrorTool.exe --mirrorType regular --intermediateUpdateDirectory C:\temp\interDB --offlineLicenseFilename license.lf --outputDirectory C:\ESET_Offline_Updates Use code with caution. --mirrorType regular : Downloads standard module updates.
In the ESET software settings, change the update server to point to the local folder path where you extracted the files.
Wait for the tool to finish downloading the virus signature databases and program modules. Phase 3: Transferring and Applying the Updates Computers that are physically separated from the internet
Now, you must tell the ESET product on the offline machine to look at your local folder instead of the internet. For ESET Endpoint Security / NOD32 Antivirus (Windows) Open the main program window of your ESET product. Press to access Advanced Setup . Click Update and expand Profiles > Updates . Expand General and click Edit next to Modules update . Disable "Choose automatically" : Toggle this off.
For the latest offline update files and tool versions, bookmark the official ESET Knowledgebase (KB) or contact your enterprise account manager. Your offline network’s safety depends entirely on the quality and currency of your update process.
Keeping your antivirus protection up to date is critical for safeguarding data. However, computers in high-security zones, remote research stations, or industrial control systems often lack internet access. ESET software relies on regular detection engine updates to spot new threats, but these isolated machines cannot connect to ESET servers.
Offline updates bridge this gap. They allow an administrator to download the necessary update files using an internet-connected machine, transfer them via removable media (like a USB drive), and apply them to the offline machines. Why Use Offline Updates?
| Scenario | Description | |:---------|:------------| | | Systems containing sensitive data or controlling critical infrastructure are deliberately isolated from the internet for security reasons. | | Limited Bandwidth Environments | In remote locations like research stations, mines, or ships, internet access may be too slow or expensive for regular virus signature updates. | | Controlled Test Environments | Security testing and software development labs may operate offline to maintain a stable, unchanging test environment. | | Backup and Redundancy | Offline updates can serve as a critical backup mechanism if your primary internet connection fails. | | Compliance Requirements | Certain industries (e.g., government, defense, finance) have regulations that require specific networks to be completely isolated from the public internet. |