#keycloak
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Keycloak Behind a Reverse Proxy: Fix 403 and Hostname Errors
Why Keycloak returns 403 behind a proxy, rejects redirect URIs, and issues tokens with the wrong issuer, and the exact options that resolve each case.
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Keycloak Memory Usage and Heap Sizing Explained
What actually consumes Keycloak memory, the documented 1250 MB baseline, the 70 percent heap rule, and how to turn login rates into node sizing.
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Keycloak vs authentik vs Authelia: What to Self-Host
A protocol, architecture and footprint comparison of three self-hosted identity servers, and the deployment shapes each one is actually built for.
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Keycloak Realms, Clients and Token Design Fundamentals
How Keycloak realms, clients, flows and token lifetimes fit together, plus the caching, session and clustering decisions that bite operators later on.