Does Cloudflare support SignalR?

Yes, Cloudflare supports ASP.NET SignalR.

SignalR negotiates what transport method to use: long polling or WebSockets. 

Customers using Cloudflare Railgun should note that when SignalIR negotiates using:

  • WebSockets, Railgun is bypassed.
  • Long polling, the request goes over Railgun but, if such request is idle for 60 seconds, Railgun times out and returns a 527 error.

Read more about Cloudflare's support of WebSockets.

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