WARP macOS fails eyeballs check on single device

SSE and Zero trust WARP
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What is the name of the domain?

cloudflareportal.com

What is the error message?

Status: Unable to Connect Error reason: Connection blocked Error code: CF_HAPPY_EYEBALLS_MITM_FAILURE Error description: WARP is unable to reach its destination.Try rebooting your router or contact your administrator to make sure all third-party security tools allow WARP ingress IPs and ports. Learn more: Client errors · Cloudflare Zero Trust docs

What is the issue you’re encountering

Starting today, the WARP client on my M3 Ultra running macOS 15.5 fails to connect to the WARP service due to a failed eyeball check. Every other device on my network can connect to the service properly. In my Unifi dashboard I can even see the connection attempts to cloudflareportal.com, which I assume is the check, and it is allowed just fine. DNS, both local (Cloudflare DNS through Unifi) and direct return the same results.

What steps have you taken to resolve the issue?

Restarted computer and Unifi gateway. Attempted to use different DNS servers, checked WARP on different devices, including another macOS device. All worked correctly.

2

Strangely, this was also broken when tethering through my phone, but a reinstall seems to have fixed it. (I really wish there was a way to export and import my split tunnel settings, now I have to set them up again.)

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