element-synapse/changelog.d/19270.doc
Andre Klärner 466994743a
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Document importance of public_baseurl for delegation and OIDC (#19270)
I just stumbled across the fact that my config used delegation as
recommended by the docs, and hosted Synapse on a subdomain. However my
config never had `public_baseurl` set and worked without issues, until I
just now tried to setup OIDC.

OIDC is initialized by the client instructing to open a URL on the
homeserver, and initially the correct URL is called, but Synapse does
not recognize it without `public_baseurl` being set correctly. After
changing this it immediately started working.

So in order to prevent anybody from making the same mistake, this adds a
small clarifying block in the OIDC docs.
2025-12-12 18:07:39 -06:00

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Document the importance of `public_baseurl` when configuring OpenID Connect authentication.