ESET Endpoint Antivirus allows you to create copies of update files that can be used to update other workstations on the network. The use of a "mirror" – a copy of the update files in the LAN environment is convenient because the update files do not need to be downloaded from the vendor update server repeatedly by each workstation. Updates are downloaded to the local mirror server and then distributed to all workstations to avoid the risk of network traffic overload. Updating client workstations from a Mirror optimizes network load balance and saves Internet connection bandwidth.

Configuration options for the local Mirror server are located in Advanced setup under Update. To access this section press F5 to access Advanced setup, click Update > Profiles and select the Mirror tab.


To create a mirror on a client workstation, enable Create update mirror. Enabling this option activates other Mirror configuration options such as the way update files will be accessed and the update path to the mirrored files.

Access to update files

Provide update files via the internal HTTP server – If enabled, update files can be accessed through HTTP, no credentials are required.


Windows XP requires service pack 2 or later to use the HTTP server.

Methods to access the Mirror server are described in detail in Updating from the Mirror. There are two basic methods for accessing the Mirror – the folder with update files can be presented as a shared network folder, or clients can access the mirror located on an HTTP server.

The folder dedicated to storing update files for the Mirror is defined under Folder to store mirrored files. To choose a different folder click Clear to delete predefined folder C:\ProgramData\ESET\ESET Endpoint Antivirus\mirror and click Edit to browse for a folder on the local computer or shared network folder. If authorization for the specified folder is required, authentication data must be entered in the Username and Password fields. If the selected destination folder is located on a network disk running the Windows NT/2000/XP operating system, the username and password specified must have write privileges for the selected folder. The username and password should be entered in the format Domain/User or Workgroup/User. Please remember to supply the corresponding passwords.

Files – When configuring the Mirror you can specify the language versions of updates you want to download. Languages selected must be supported by the mirror server configured by the user.

icon_section HTTP server

Server port – By default, the Server port is set to 2221.

Authentication – Defines the method of authentication used for accessing update files. The following options are available: None, Basic and NTLM. Select Basic to use base64 encoding with basic username and password authentication. The NTLM option provides encoding using a safe encoding method. For authentication, the user created on the workstation sharing the update files is used. The default setting is None, which grants access to the update files with no need for authentication.

Append your Certificate chain file, or generate a self-signed certificate if you want to run HTTP server with HTTPS (SSL) support. The following certificate types are available: ASN, PEM and PFX. For additional security, you can use HTTPS protocol to download update files. It is almost impossible to track data transfers and login credentials using this protocol. The Private key type option is set to Integrated by default (and therefore the Private key file option is disabled by default). This means that the private key is a part of the selected certificate chain file.


icon_section Connect to LAN as

Local user type – The System account (default), Current user, and Specified user settings will be displayed in their corresponding drop-down menus. Username and Password settings are optional. See Connect to LAN as.

Select Disconnect from server after update to force a disconnection if a connection to the server remains active after updates have been downloaded.

icon_section Program component update

Automatically update components – Allows for the installation of new features and updates to existing features. An update can be performed automatically without user intervention, or you can choose to be notified. After a program component update has been installed, a computer restart may be required.

Update components now – Updates your program components to the latest version.