This guide is for educational purposes. Using update mirrors without a valid license violates ESET’s EULA. We strongly recommend purchasing a legitimate license for full protection and cloud features.
Below is a curated list of that have been tested to work with ESET NOD32 versions 9 through 15. These do not require a license key but only download virus signature database updates (not program components).
A "mirror server" or alternative update server is a local or remote repository that downloads updates from ESET once and redistributes them to other machines. In corporate environments, administrators use this built-in feature to save internet bandwidth. However, some public servers host these files openly, allowing unlicensed users to change their update path to point to these free mirrors. Why Public Free Mirror Lists Frequently Fail
Article last tested: April 19, 2026 – all servers confirmed working.
http://mirror01.eset.com
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[HKEY_LOCAL_MACHINE\SOFTWARE\ESET\ESET Security\CurrentVersion\Plugins\01000400\Settings] "FailSafeServer"="http://update.eset.com/eset_eval/" "DefaultServer0"="http://um10.eset.com/eset_eval/" "DefaultServer1"="http://93.184.71.27/eset_eval/" "DefaultServer2"="http://um12.eset.com/eset_eval/" "DefaultServer3"="http://um13.eset.com/eset_eval/" "DefaultServerCount"=dword:00000004
To force newer versions of ESET NOD32 to accept third-party update servers, users often have to install "cracks," "patches," or registry modifications. These tools are frequently bundled with trojans, info-stealers, or cryptocurrency miners. Legitimate, Safe Alternatives to Free Mirror Servers