Download options:
--source <URL or absolute path>
Installation source: a mirror URL or an absolute path
to a directory containing top-level products.inf3 file.
Sample values:
http://autoinstall.plesk.com/
/root/parallels/
http://autoinstall-win.plesk.com/
C:\ParallelsInstaller\parallels
--download-retry-count <number>
Maximum number of retries for download operations.
Proxy server options:
--proxy-host <host> HTTP(S) proxy server domain name or IP address.
--proxy-port <port> Proxy server port number.
--proxy-user <user> Set username for authorization at the proxy server.
--proxy-password <password>
Set password for authorization at the proxy server.