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Richard van der Hoff 2018-11-06 11:38:46 +00:00
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proposals/1708-well-known-for-federation.md
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@ -112,6 +112,21 @@ interact with caches?). On the other hand, we'll presumably be using an HTTP
client library to handle some of the caching stuff, and they might be useful
for something?
## Problems
It will take a while for `.well-known` to be supported across the ecosystem;
until it is, it will be difficult to deploy homeservers which rely on it for
their routing: if Alice is using a current homeserver implementation, and Bob
deploys a new implementation which relies on `.well-known` for routing, then
Alice will be unable to send messages to Bob. (This is the same problem we have with
[SNI](https://github.com/matrix-org/synapse/issues/1491#issuecomment-415153428).)
The main defence against this seems to be to release support for `.well-known`
as soom as possible, to maximise uptake in the ecosystem. It is likely that, as
we approach Matrix 1.0, there will be sufficient other new features (such as
new Room versions) that upgading will be necessary anyway.
## Security considerations
The `.well-known` file potentially broadens the attack surface for an attacker