Cloudflare Access allows your users to use LinkedIn as their identity provider (IdP).
Configuring LinkedIn as a Cloudflare Access IdP requires a LinkedIn account.
To configure LinkedIn as an IdP:
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Select Create App.
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Sign in to your LinkedIn account. The Create an app screen displays.
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Enter an App name for your application.
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Enter the URL for your business page.
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Select Upload a logo and go to your company logo image file.
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Select OK.
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(optional) Select the Share on LinkedIn option to announce that your clients can use LinkedIn to access your app.
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Select the Sign In with LinkedIn option.
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Select the API Terms of Use link to read the terms of use.
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If you agree to the terms, check the I have read and agree to these terms option.
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Select Create app.
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Go to your account Settings page.
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Select the Auth tab.
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Copy the Client ID and Client Secret.

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In Zero Trust, go to Settings > Authentication.
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Under Login methods, select Add new.
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Select LinkedIn as your IdP.
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In the App ID and Client secret fields, input the Client ID and Client secret values you’ve copied from the Application credentials tab in the LinkedIn Developer Portal.
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Select Save.
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In the LinkedIn Auth tab, scroll to OAuth 2.0 settings and select the pencil icon to edit the settings.
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Enter the following URL:
https://<your-team-name>.cloudflareaccess.com/cdn-cgi/access/callbackYou can find your team name in Zero Trust under Settings > Custom Pages.
 
To test that your connection is working, in Zero Trust, go to Authentication > Login methods and select Test next to LinkedIn.
{  "config": {    "client_id": "<your client id>",    "client_secret": "<your client secret>"  },  "type": "linkedin",  "name": "my example idp"}