Utover grunnleggende IAM, er det viktig å forstå roller (antatt identiteter), rettighettyper og evaluering (hvordan tillatelser bestemmes), og mønstre som tverrkonttilgang og serviceroller for sikker, godt utformet AWS-tilgangsadministrasjon.
Roller i detalj — hvem antar hva
A ROLE has TWO key policies:
TRUST POLICY → WHO can assume the role (which principals: a service, account, user)
PERMISSION POLICIES → WHAT the role can do once assumed
Use cases:
→ SERVICE roles — an EC2/Lambda assumes a role to access AWS (no embedded keys)
→ CROSS-ACCOUNT — account B's role trusts account A → A's users assume it (controlled access)
→ FEDERATION/SSO — external identities assume roles (temporary credentials)
→ Roles give TEMPORARY credentials (auto-rotated) — far safer than long-lived keys.
