This version of update tool doesn't require ESET Gateway Security and supports mirroring protocol version 2 and 3. Their update URL must be different - filename of both versions is update.ver, the content is different.
- Download and install linux executable unrar-free (Debian package name is unrar-free; it should be compatible with other distributions as well though).
- Download the script below, modify the settings and test the script.
- Configure the webserver to access the mirror update directory at certain path.
- Add the script execution hourly to crontab (ex. 15 * * * * root /root/scripts/nodupdate.sh &> /dev/null).
- Configure NOD32 update server on client computers to use local mirror.
PHP version is more advanced and faster.