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Keycloak - restrict access to certain applications (feddit.de)

submitted 1 year ago by [email protected] to c/[email protected]

4 comments fedilink hide all child comments

Hi, I have successfully set up Keycloak and use it for a few of the applications that I'm running (unfortunately not every app supports oauth2/oidc yet).

However there's one issue I haven't been able to resolve yet: I want to restrict access to certain applications (like portainer) to specific users (me).

I've already tried going to the portainer client > Authorization, added a role based policy and added the policy to the default permission, but other users that don't have this role can still log in. If I go to "Evaluate" it gives me the expected correct result for the different users

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[–] [email protected] 2 points 1 year ago

Keycloak claims to handle authorization, but the part that it handles goes only up to enumerating what accesses you have.

Checking those accesses and allowing or restricting the usage is up to your system.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

I’m no expert, but Keycloak is just doing authentication (does the user have a valid account?) for you. For authorisation (is the authenticated user allowed to access the site?) you could put Pomerium in front of your apps and authorise based on user groups for different paths.

Not sure about portainer though, that might be a bug?

[–] [email protected] 1 points 1 year ago

I have no experience with portainer, but some apps have an option to disable new user registration, and that's what I would recommend first. (I do use Keycloak myself too)

[–] [email protected] 1 points 1 year ago

I use specific groups within KeyCloak to define what applications I want a user to see. However, I am using Cloudflare Zero Trust and passing the group claim.