Which ports need to be open on my network?

If you are using Threema behind a Firewall, please make sure that the following TCP ports are open:

  • 5222
  • 443

To make Threema Calls, port 3478 needs to be open for outgoing UDP traffic.

To reliably receive push notifications, the following TCP ports need to be open:

  • 5223 (Apple)
  • 5228-5230 (Google)
  • 443 (Microsoft)

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