Traefik, Authentik, Nextcloud and Collabora Office

[wwe]

@dnilgreb

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Failed to establish socket connection or socket connection closed unexpectedly.

this happens because your proxy auth forward requests from CODE to Authentik, which brakes the WOPI integration. Please review Collabora integration guide and pay attention at “communication triangle”

@dnilgreb

And I setup Nextcloud as an app with a Proxy Provider in Authentik.

I would not recommend proxy auth for NC (or at least you need extra work to bypass CODE requests). Authentik and NC both support openidconnect which is intended for external IdP integration.