How to configure a mirror
ESET Endpoint Antivirus can be configured to store copies of virus signature update files and distribute updates to other workstations that are running ESET Endpoint Security or ESET Endpoint Antivirus.
Configuring ESET Endpoint Antivirus as a Mirror server to provide updates via an internal HTTP server
Press F5 to access Advanced setup and expand Update > Basic. Make sure the Update server is set to AUTOSELECT. Select Create update mirror and Provide update files via internal HTTP server from Advanced setup > Basic > Mirror.
Configuring a Mirror server to provide updates via a shared network folder
Create a shared folder on a local or network device. This folder must be readable by all users running ESET security solutions and writable from the local SYSTEM account. Activate Create update mirror under Advanced setup > Basic > Mirror. Browse and select the created shared folder.