In business environments, a computer with internet access acts as a "Mirror Server". It hosts the update files, which other computers on the local network (LAN) then pull from, either via an HTTP server or a shared network folder (SMB) .

Set the custom path to point directly to the extracted folder: file:///C:/ESET_Offline . Trigger the update manually from the main dashboard. Best Practices for Managing Offline Updates

Navigate to and select your active product license.

Where possible, use scripts to automate the operation of the Mirror Tool. This eliminates manual errors and ensures your offline repository is always up to date.

Part 2: Step-by-Step Procedure to Update ESET Offline (Home/Small Office)

ESET offline updates refer to the process of updating virus signature databases, detection engines, and program modules on computers that are . Instead of pulling updates directly from ESET's online servers, an offline machine retrieves them from an alternative local source, such as:

If you have a large number of air-gapped machines, manually updating them via USB is tedious. ESET PROTECT can automate this by acting as a localized update server.

: A full offline repository currently requires approximately 1.2 TB of free storage space. Implementation Process

Computers in restricted networks cannot connect to the internet for security and compliance reasons.

Once you have copied the downloaded folder to the offline computer (or a shared network drive), configure the ESET product to look there for updates instead of the internet: : Open your ESET program and press F5 . Set Update Server : Navigate to Update → Profiles → Updates . Disable Choose automatically and select Custom server .

Obtain the Mirror Tool from the ESET download page (available for Windows and Linux).

An administrator uses a dedicated internet-connected machine to download all necessary updates from ESET. These updates are then transferred to the offline environment and distributed to client machines via a local web server or shared folder.

: Use the ESET Mirror tool on a machine with internet access to download all necessary updates. These files can then be transferred via a USB drive or network share to the offline machines.

3. Connection Timeout when using ESET PROTECT for distribution