Access control to applications is commonly managed through authentication and authorization at the application level, ensuring users must provide credentials before gaining entry. However, this approach alone may not be sufficient. Even unauthorized users can often still reach login pages, unnecessarily exposing application infrastructure to potential threats. For applications that do not allow self-registration, this exposure poses avoidable risks. Many critical systems require restricted access and operate on dedicated infrastructures, emphasizing the need for stronger network-level controls. Limiting visibility and access at the network layer, alongside application-level security, enhances protection by reducing attack surfaces and preventing unnecessary exposure of sensitive resources.

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