While I have no idea what is the cause of your current problem, I can tell you that normally, on a OpenServer supported by Check Point (check HCL), everything works fine:
- Plain install with ISO
- CPUSE: Major Upgrade to vanilla GA, Major Upgrade with Blink, Jumbo HFA installation, all with direct download over CPUSE*
* Download over CPUSE directly from CP requires internet connection and a valid license / contract.
The reason to use blink image for upgrade (or appliance re-image) instead of vanilla + Jumbo HFA is:
- its faster, only one reboot instead of two.
- in case you have an existing gateway exposed to unsecure or critical networks (and you do not isolate it during the upgrade), than you do not have a timespan where an unpatched vanilla gateway is in service. Otherwise an example: R80.30 Jumbo HFA Txxx with critical security patches -> upgrade to R80.40 vanilla GA (without current security patches) -> update to Jumbo HFA Tyyy with critical security patches.
If both points aren't relevant for you, it does not matter if you use vanilla + jumbo or blink with integrated jumbo.
If you install an Open Server from scratch, you have to use vanilla ISO because CP does not provide a Blink ISO yet, only Blink tgz files which either need an appliance or an OpenServer with has already Gaia installed.
You said Open Server with unknown brand name, so I would suggest checking HCL or at least driver compatibility regarding NICs.
Just for interest, you said "it was not possible do directly downloading it from CPUSE": What was the error message?