---
type: issue
id: "0060"
status: open
created: 2026-07-28
milestone: M1
priority: medium
area: security
projekt: gitops
gitlab_iid: "17"
related: []
---
# Federation allowlist or closed federation decision

> Adoptiert aus [gitops#17](https://git.lab/axion1337.chat/axion1337.chat-gitops/-/issues/17) (2026-08-18, ADR-0019). Kommentare und Verlauf bleiben dort; kanonisch ist ab jetzt diese Datei.

Decide: open federation with all public Matrix servers (current default, larger attack surface) vs. an explicit `federation_domain_whitelist`, vs. fully closed federation (`allow_public_rooms_without_join_rules: false`). Config lives in `apps/production/custom-configs/synapse-values.yaml`.

---
*Migriert aus Gitea `sorb/axion1337.chat-gitops#17` — dort erstellt am 2026-07-28 von sorb.*
<!-- gitea-migration: sorb/axion1337.chat-gitops#17 -->