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VPN Client open tap device error on Mac Osx 10.4.3


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#1 roberto colonello

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Posted 13 February 2019 - 05:03 AM

I installed the last version of the barracuda client VPN for Mac Osx on my macbook pro 2018 but I receive this error when I start a connection:

 

Open Failed: no such file or directory

open tap device

 

Tap is configured on /dev/tun0, but I tried also from tun1 to tun3

 

I tried also the previous versions of the VPN, but I have still this error

 

thanks

 

Roberto



#2 Gavin Chappell

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Posted 13 February 2019 - 05:34 AM

I assume you mean macOS 10.14.3 (i.e. Mojave)?
 
This sounds like the relatively new security improvements where the operating system will not load a kernel extension until you authorise it to do so in the "Security and Privacy" preferences pane inside "System Preferences". Unfortunately, I believe the prompt to load the extension only appears for 30 minutes, and it may only appear the first time you try to load the extension - https://developer.apple.com/library/archive/technotes/tn2459/_index.htmlhas more information.
 
My suggestion would be to try launching the VPN connection again, and immediately after you do so, open the "Security and Privacy" pane; if the prompt appears then accept the prompt and everything should be fine. If macOS is not showing you the prompt a second time then there are complicated procedures for forcing the OS to prompt you again, which are already well documented via Google results.



#3 frenay

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Posted 19 March 2020 - 09:48 AM

Hi,

 

I have the same issue on Mojave.But in Security and Privacy, no message appears to authorize the extension. What to do ?

 

thank you.

Regards.



#4 Gavin Chappell

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Posted 19 March 2020 - 09:59 AM

Unfortunately, I believe the prompt to load the extension only appears for 30 minutes, and it may only appear the first time you try to load the extension

Sounds like you may have missed the prompt that appears, as it is time-limited.

 

There is a workaround, which involves having your Mac in Recovery mode, and manipulating or disabling the security checks. However since this may disable some security checks, please make sure you have a good understanding of what you're doing and don't do anything which may go against your company's IT policies. https://eclecticlight.co/2019/06/01/how-to-bypass-mojave-10-14-5s-new-kext-security/is the sort of information I'm talking about, however I would not recommend disabling this protection altogether.



#5 frenay

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Posted 19 March 2020 - 11:18 AM

thank you for your quickly answer. 

If i create a new profile/new user on the Mac or uninstall completly barrcuda vpn app and reinstall, the message will appear again to unblock?



#6 Gavin Chappell

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Posted 19 March 2020 - 11:23 AM

No - because it's a system-wide setting, my understanding is that you see this prompt exactly one time on a system. If you don't accept the prompt in the time limit then Apple won't show you the prompt again.



#7 frenay

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Posted 20 March 2020 - 10:00 AM

I tried this https://eclecticlight.co/2019/06/01/how-to-bypass-mojave-10-14-5s-new-kext-security/

 

It works!

 

Thank you.



#8 Finlay Morgan

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Posted 23 March 2020 - 03:53 AM

I tried this https://eclecticlight.co/2019/06/01/how-to-bypass-mojave-10-14-5s-new-kext-security/

 

It works!

 

Thank you.

 

I will also try this one if it works? Thank you!