Answer by Nathan Basanese for How do I require login authentication to access the Vault UI console on port 8500?

8500 is the default port for Consul, not Vault.

Are you sure it's not Consul?

For reference, here are the default UIs for Consul and Vault, respectively:

Consul (Port 8500)

Vault (Port 8200)

Please add more details, because it looks like you're asking about Consul ACLs, not Vault UI access stuff.