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# ask-questionsw
worried-planet-2191
02/07/2022, 3:41 PMThis message was deleted.
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future-teacher-7046
02/07/2022, 3:44 PM
What error are you seeing exactly? Typically if there are CORS issues, you wouldn't even be able to see the auth form at all
q
quick-orange-44935
02/07/2022, 3:45 PM Copy code
Access to fetch at '<https://growthbook-api>.<DOMAIN>/auth/firsttime' from origin '<https://growthbook-ui>.<DOMAIN>' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.f
future-teacher-7046
02/07/2022, 3:47 PM
Hmm. I don't think GrowthBook does any redirects from the API side. Is that coming from somewhere else like traefik?
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quick-orange-44935
02/07/2022, 4:32 PMit is possible that using traefik ingress for
growthbook-apiquick-orange-44935
02/07/2022, 4:33 PMis there a recommended way to support https traffic? do the servers support https traffic over port 443?
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future-teacher-7046
02/07/2022, 4:46 PM
Self-hosted GrowthBook does not use Google OAuth for logging in. It stores users locally within MongoDB. So there's no redirect happening at all on the GrowthBook side.
As far as https, the containers themselves only support http, so you would need to do SSL termination at the proxy or load balancer level
future-teacher-7046
02/07/2022, 4:48 PM
From your error, it looks like the OPTIONS request is returning a 301 redirect (or similar). Can you see where it's trying to redirect to? That might give a clue as to where it's coming from
q
quick-orange-44935
02/07/2022, 9:52 PMyup, this was due to traefik triggering oauth redirect
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