Hi,

Il 01/04/20 18:14, Nathan Stratton Treadway ha scritto:
> On Thu, Mar 26, 2020 at 17:11:27 +0200, Samuli Seppänen wrote:
>> Il 26/03/20 15:47, Ralf Hildebrandt ha scritto:
>>> As you might have heard this covid19 thingy is forcing (our) users to
>>> work from home. 
>>>
>>> We're using openvpn (in the meantime we deployed three openvpn servers
>>> to handle the load adn have optimised the scripts to lower the overall
>>> latency upon execution), and recently we encountered massive problems with
>>> openvpn 2.4.8 on Windows 10. The bundled TAP32 Adapter is having
>>> issues (little yellow triangle with an exclamation mark in the device 
>>> manager).
>>
>> Can you send me (privately) C:\Windows\inf\setupapi.dev.log from one or
>> some of the affected computers? Or just the part of it which describes
>> the failed tap-windows6 installation (rather easy to find).
> 
> We've just hit what I assume is the same problem at our site. 
> Interestingly we have two "twin" Windows 10 machines (same model
> purchased at the same time), but OpenVPN installed fine on one and had
> the problem on the other.
> 
> (Specifically on the failed machine the TAP-Windows Adapter V9 entry in
> the Deveice manger has a Device Status of "Windows cannot verify the
> digital signature for the drivers required for this device. A recent
> hardware or software change might have installed a file that is signed
> incorrectly or damaged, or that might be malicious software from an
> unknown source. (Code 52)"..)
> 
> On both of these machines OpenVPN had never been installed before
> the recent installation.
> 
> I should be able to get the setupapi.dev.log  files from both of the
> machines if that would be helpful.

I looked at Ralf's logs and they show that - for whatever reason - the
tap-windows installer chose to install the Windows 7 version of
tap-windows6 on those Windows 10 instances. The Digital signer in the
device properties should show "Microsoft Windows Hardware
Compatibility Publisher" (=attestation signature), not "OpenVPN Inc"
(cross-signed).

Assuming 9.23.x works it "should be easy"(tm) to figure out what the
difference is. Or maybe something changed in Windows which causes this
misbehavior. Fully removing all traces of tap-windows6 from the system,
e.g. with Remote-Tapwindows.ps1:

<https://github.com/mattock/tap-windows-scripts>

Can you guys try if that full removal helps with this?

Samuli


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