You can configure a workstation with internet access to act as a local update server. It downloads the latest detection engine modules and stores them in a specific storage folder Internal HTTP Server:

Download the designated update packaging zip file from ESET’s authorized offline support link.

Press the key on your keyboard to open the Advanced Setup tree. Click on Update in the left-hand menu.

Download the version of the Mirror Tool that matches your operating system (Windows or Linux). Step 2: Create the Configuration Script