"This browser doesn't support WebAuthn API" when accessing from VM host

cedarcode / webauthn-rails-demo-app

Rails app demonstrating a WebAuthn password-less login

https://webauthn.cedarcode.com

Apache License 2.0

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"This browser doesn't support WebAuthn API" when accessing from VM host #141

Closed tashian closed 6 months ago

tashian commented 6 months ago

I'm running this app inside a VM. When I access it via localhost from inside the VM, it works fine. When I access it from the host, using the VM's DNS name or IP, I get the "This browser doesn't support WebAuthn API" error, no matter which browser I use.

I've given my VM a DNS name, and I've set WEBAUTHN_ORIGIN=http://vm.dns.name:3000.
I've also set config.hosts << "vm.dns.name:3000"
I'm running with development rails env, and I'm binding to 0.0.0.0.

tashian commented 6 months ago

Ah. WebAuthn requires either localhost or https. I needed to set up a server certificate.