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Setup HTTPS for OIDC endpoint with Authentik and Keycloak for vCenter Server or VCF Identity Federation

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If you have been following my recent adventures in playing with both Authentik and Keycloak as an OAuth/OIDC Identity Provider (IdP) for use with vCenter Server or VMware Cloud Foundation (VCF) Identity Federation, you can take it one step further and authenticate with a Yubico YubiKey or Apple Face ID for additional security.

In my original setup, the OIDC endpoint provided by both Authentik and Keycloak was using HTTP and works perfectly fine with both vCenter Server and SDDC Manager for a VCF-based environment. With that said, if you have a requirement to serve the OIDC endpoint over HTTPS, which is a requirement for using WebAuthn (e.g. YubiKey, Face Id, etc), then some additional configurations are required on both the identity provider as well on the vCenter Server side depending on the type of TLS certificate you are using.

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Passwordless login to vCenter Server or VMware Cloud Foundation (VCF) using Apple Face ID or Yubico YubiKey

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After spending some time playing with a couple of self-hosted Identity Providers solutions like Authentik and Keycloak for use with vCenter Server Identity Federation, I was curious about their Multi-Factor Authentication (MFA) support. Specifically, I was interested in their WebAuthn capabilities, which should allow me to use the popular Yubico YubiKey for passwordless authentication into my VMware environment. 😊


It is also important to mention, today vCenter Server Identity Federation officially supports the following IdPs listed below, all of which have support for the YubiKey (linked below is the official Yubico documentation for each IdP from Yubico's website):

If you are already consuming one of these IdPs, you already have the ability to to use a YubiKey or other supported WebAuthn device for passwordless login! For VMware Cloud Foundation (VCF) customers, Identity Federation is also supported with the same IdPs as it relies on the VCF Management Domain vCenter Server, so this would allow you to login to SDDC Manager using YubiKey as an example.

I have never used a YubiKey before, so this was going to be a new adventure for me as well as playing with the WebAuthn protocol which is also new for me. I really like the UX of Authentik, which provides a seamless experience and with built-in support for SCIM, the choice was easy for the IdP I would choose for this experiment.

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vCenter Server Identity Federation with Authentik Identity Provider

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While answering a recent question on the VMware Reddit Community, I came to learn about Authentik, an open source identity provider (IdP), which is pretty feature rich and best of all, you can self-host the Authentik IdP solution.

While Authentik is not one of the officially supported Identity Providers for vCenter Server Identity Federation such as Okta, Microsoft Entra ID, Microsoft ADFS or PingFederate, I was curious if it would to allow me to easily play with the Identity Federation feature in vCenter Server? 🤔

Hint: It works! 😁

Disclaimer: Authentik is currently not an officially supported vCenter Server IdP as mentioned earlier, please use at your own risk.

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