Technical Requirements

Hardware, software, and networking requirements for running the Once portal in your district.

Hardware

Each instructor requires access to a laptop computer or iPad with a front-facing camera. The device must be connected to the internet.

We recommend that the computer has at minimum 4 GB RAM and Intel Core i3 processor or equivalent. There is no minimum storage requirement, since no files are stored on the computer as part of the Once program.

Software / Networking

Once is cloud-based and does not require any software to be downloaded or installed.

Once works on all major browsers, but we recommend using recent versions of Chrome and Safari for best results.

The Once portal is available at go.tryonce.com. This URL redirects to a page built on Google Firebase. If your network filters out Firebase or redirects more generally, you will need to make an exception for go.tryonce.com. You should also ensure that all tryonce.com subdomains are whitelisted, such as api.tryonce.com, curriculum.tryonce.com, and docs.tryonce.com. We add new subdomains from time to time, so the best approach is to whitelist https://*.tryonce.com.

The Once portal also utilizes the following services which should be whitelisted:

  1. HTTPS connections to:
    • https://*.sentry.io/* (for Sentry, our error reporting service)
    • https://*.launchdarkly.com/* (for LaunchDarkly, our settings configuration service)
    • https://*.amplitude.com/* (for Amplitude, our analytics service)
  2. *.stun.twilio.com must be reachable on TCP/UDP/3478 or TCP/443 (for Twilio, our authentication service).
  3. Additionally, your proxy server should handle these requirements if you’re using one.