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How To Stop the Self-Signed Cert warning when connecting to vCenter

By Vladan SEGET | Last Updated: January 27, 2016

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This is a usual situation. You connect to vCenter with self-signed certificate installed and you get this warning on your web browser, that the security certificate presented by this website was not issued by a trusted certificate authority. It's normal as the certificate isn't really trusted by nobody, but you. And it's you who gets this message. It's possible to Stop the Self-Signed Cert warning when connecting to vCenter quite easily (if you know how to do that). That's why this post.

This walk through is valid for Internet explorer. For Firefox it's a bit easier as you just have to follow the link called I Understand the risk and add a Security Exception. But IE users might be interested.

Let's get started. Basically when you first connect to vCenter server you'll see your web browser complaining about problem with this website's security certificate. It's a web page like this. Click the Continue to this website link (not recommended).

 Stop the Self-Signed Cert warning when connecting to vCenter

When you do this you get this view where you can click on a link Download trusted root CA certificates.

Click the download trusted root CA certificates

Click the link and go to your download folder where you'll find a file called download without an extension. Click save. You'll find the file in the Download folder, and it's name is Download too….

Ho to Stop the Self-Signed Cert warning when connecting to vCenter

Next step is quite unattended. You'll have to change the extension and rename the file to download.zip in order to be able to extract the files (yes there are more than 1 file inside this file) from it…

Ho to Stop the Self-Signed Cert warning when connecting to vCenter

So far so good. Now we need to extract the files out of the compressed file. Do a right click and select Extract All. You'll see that there are 2 files inside of the newly created folder called certs….

Ho to Stop the Self-Signed Cert warning when connecting to vCenter

If you look closer, one of the files is with extension .0 and the other one with .r0

What we need is the .0

We'll rename the file to .cer

Ho to Stop the Self-Signed Cert warning when connecting to vCenter

That's it. Now it gets an icon which is recognized by your (Windows) machine…

Ho to Stop the Self-Signed Cert warning when connecting to vCenter

Now you'll need a cert manager console. Let's open cmd with admin priviledges. (I assume that you know how to do that, depending on which system you're working, if it's joined to a domain and if the user has local admin rights on that system.

certmgr.msc is the command

How-to Stop the Self-Signed Cert warning when connecting to vCenter

And it will open this console.. Do a right click on the sub-folder Certificates in the Trusted Root Certification Authorities > Import

How-to Stop the Self-Signed Cert warning when connecting to vCenter

You'll see an assistant like this..

.How-to Stop the Self-Signed Cert warning when connecting to vCenter

Go and browse for the certificate…

How-to Stop the Self-Signed Cert warning when connecting to vCenter

The Trusted Root certification authorities certificate store is pre selected. Click the next button to import the certificate.

How to Stop the Self-Signed Cert warning when connecting to vCenter

And the final confirmation looks like this…

How to Stop the Self-Signed Cert warning when connecting to vCenter

You can verify within the console that the certificate (called CA) is there…

How to Stop the Self-Signed Cert warning when connecting to vCenter

And now when you close and start again your browser, you don't see a warning… -:)

How to Stop the Self-Signed Cert warning when connecting to vCenter

As you could see, the procedure is quite simple to follow. I hope you have enjoyed it…

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| Filed Under: How To Tagged With: How To Stop the Self-Signed Cert warning when connecting to vCenter, Self-Signed Cert warning when connecting to vCenter

About Vladan SEGET

This website is maintained by Vladan SEGET. Vladan is as an Independent consultant, professional blogger, vExpert x16, Veeam Vanguard x9, VCAP-DCA/DCD, ESX Virtualization site has started as a simple bookmarking site, but quickly found a large following of readers and subscribers.

Connect on: Facebook. Feel free to network via Twitter @vladan.

Comments

  1. Chinthu says

    January 27, 2016 at 8:12 pm

    I guess this works only for vCenter Server Appliance, not for the Windows vCenter Server. For the Windows vCenter Server, you won’t get the “Download Truster Root CA Certificate” link. Is there any other workaround for the Window vCenter Server?

    • Vladan SEGET says

      January 27, 2016 at 8:27 pm

      No, I just reproduced it in my lab where I run Windows based vCenter server…

  2. Stephen says

    February 2, 2016 at 10:20 pm

    This is specific to version 6.x+ correct? I don’t see a download link for the certificates with 5.5 Update 3

    • Vladan SEGET says

      February 3, 2016 at 6:58 am

      Yes. My environment is 6.x and I haven’t tested on 5.5 u3. If you’re saying that the link isn’t there, then it’s true…

  3. Miguel Rayo says

    February 10, 2016 at 1:06 pm

    My environment is 5.1.
    I get certificate from vCenter Server (Windows) at C:\ProgramData\VMware\SSL\ca_certificates.crt

  4. Luciano Patrao says

    February 15, 2016 at 3:41 pm

    Hi Vlandan,

    I have 5.5 and 6.x, only in the 6.x we have the option “Download Truster Root CA Certificate” link.

    For 5.x we can find the same .0 file in C:\ProgramData\VMware\SSL, after renamed to .cer we can import also and works.

    Luciano Patrao

    • Vladan SEGET says

      February 15, 2016 at 3:56 pm

      Thanks for the comment Luciano….
      Cheers,
      Vladan

  5. Tayfun Deger says

    February 29, 2016 at 10:13 pm

    Thank you very much Vladan!

  6. Paul Braren says

    April 15, 2017 at 3:03 am

    Great article! One change I noticed recently with VCSA 6.5.0a is that the download.zip now extracts to subdirectories, here’s my example filename, imported into Windows 10 just fine:
    download/certs/win/926c2d7b.0.crt

  7. Simon says

    May 15, 2017 at 3:23 am

    Great article! I was going to use cert manager but this was much easier… thanks 🙂

  8. Hahn says

    May 22, 2019 at 9:51 am

    Hello, Vladan. This will be my first time leaving a reply on your web site albeit being your regular reader. I appreciate your kind and nice guiding for many VMware world people.

    I followed every details from your guide for this topic in my own lab environment of 6.5 VCSA.

    However, it showed the usual warning message with all the browsers.

    I am not sure it might have changed something in 6.5 VCSA.

    Anyone having same issue?

    • Vladan SEGET says

      May 22, 2019 at 9:57 am

      Hi Hahn, thanks for reading my blog. It’s possible as vCSA 6.5 has regular updates and upgrades since this original article. I haven’t tested with the latest upgrade though. Usually, when you put a cert into the root authority cert store, the pop-up should disappear. But certs are pain -:).

      • Hahn says

        May 22, 2019 at 10:10 am

        Hello, Vladan. Surprisingly fast replay. :->

        It was my bad. I kept trying to access the vcenter with the IP address, not the FQDN!!

        It was fine, working as expected.

        I changed the old CA signed certificate with new one in the View environment for my client yesterday.

        Then, I had the same failure with accessing the IP address!!

        “It’s the FQDN, stupid!!” will be my jingle for the time being.

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