I had the same problem with Portainer 2.13.1 behind an Apache2 proxy. I solved it by running the image with the option enabling port 9000 which is Portainer's HTTP port. docker - Portainer: Client sent an HTTP request to an HTTPS server ...

Understanding the Context

Looking for a basic "how to schedule a container" via Portainer.. Tons of fantastic documentation, but nothing that really helps with how to perform a basic task like this. I believe I ca... I have Portainer CE 2.9.2 running in a docker container.

Key Insights

I'm starting it with the --sslcert and --sslkey options to specify my own certificate, but the browser keeps showing the built-in certificate, docker - Why is Portainer ignoring my certificate even though I have ... In my case I was running both Keycloak and Portainer in the same Kubernetes cluster and I hadn't configured CoreDNS to use my upstream DNS server correctly. Starting Portainer with --log-level=DEBUG revealed that Portainer was unable to resolve the Keycloak server while trying to swap the auth code for a token. portainer keycloak 20 oauth login "unauthorized" / "Unable to login via ... I am on Ubuntu 22 have just installed Docker and Portainer, when I try to access it via IP:9000, I get a timeout message: "New Portainer installation Your Portainer instance timed out for security purposes.

Final Thoughts