SSL Decryption Certificate Issues
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SSL Decryption Certificate Issues

L1 Bithead

I have created the SSL decryption certificate and applied it using group policy. When testing I have several workstations that work with no issue but many others that recieve certificate errors. I cannot find any difference in the browser setup, the SSL certificate is in the workstation trusted root store where it should be. It looks like a 50/50 success rate. Windows 10 workstations, some on 1809 and some on 1903 with the same mixed results. I am at a loss, anybody had this issue?

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L1 Bithead

So I believe I amy have to solution figured out. In the certificate options there is a box for root certificate. None of the instructions I read referenced that, but after checking that and re-deploying the certificate my sucess rate is 100%.

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4 REPLIES 4

Cyber Elite
Cyber Elite

@Millette,

What browser are you using for these tests? Some browsers will not, by default, look at the machines certificate store and will use their own. 

IE is our primary browser but we also use Chrome.

L1 Bithead

So I believe I amy have to solution figured out. In the certificate options there is a box for root certificate. None of the instructions I read referenced that, but after checking that and re-deploying the certificate my sucess rate is 100%.

View solution in original post

@Millette,

Odd that the guide you were following left that out, as it's a requirement to get this to function correctly. If you allow the installation of Firefox you'll also need to utilize the ESR version or do a little bit of manual work for FireFox to trust your cert; by default FireFox will not read the Windows cert store.

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