I assume that you’re referring to the Admin Console. Since Openfire 4.8.0, this by default is only available on the local host, as a security precaution. This behavior can be configured during the initial setup, but also later. You can find various posts on this forum that explain how to change the behavior. See, for example, https://discourse.igniterealtime.org/t/guide-how-to-unlock-the-openfire-admin-console