If your firm routes traffic through a corporate proxy, PAC file, or firewall, a few domains need to be allowed (or bypassed) for Pirros to work. This article is the definitive list, written for the IT team that manages those rules.

When a required domain is blocked, the most common symptoms are:

Turning the proxy or PAC file off will usually confirm the cause, but it isn't a long-term fix. Adding the domains below is.

All of these are required. Note that auth.pirros.com, auth.pirros.io, and pirros-prod.us.auth0.com are three different services — all need to be allowed.

This one is easy to miss. The captcha only appears some of the time, so it rarely shows up in a normal test — but it's much more likely to appear on a proxied network, because every user shares the same outbound IP address. If the captcha is required but blocked, the sign-in form submits and lands back on the email screen, which produces the invite-link loop described above.

To check whether the captcha is the culprit, have an affected User open the invite link in Chrome or Edge and:

Once the domains are added, have the User close the browser tab and open the invite link again.

If your firm signs in to Pirros with single sign-on, your identity provider's domains also need to be reachable. These vary by firm. Common examples:

Pirros has two Revit plugins — Pirros in Revit (a docked panel) and the classic plugin — and they don't use exactly the same domains. Each plugin, and the automatic updater that keeps it current, contacts these domains from the lists above:

Certificate revocation checks: the automatic updater that comes with a 4.x installer checks the installer's digital signature before installing an update, including whether the signing certificate has been revoked. If the computer can't reach the certificate authority's revocation (CRL/OCSP) servers, the update isn't installed — so allow certificate revocation checks through your proxy or firewall. The updater that comes with a 3.x installer doesn't make this check.

The domains above cover signing in and using Pirros. If your firewall is blocking the plugin installer itself, see Revit Plugin: Download & Installation. Automatic plugin updates need the domains listed for the automatic updater above.

Reach out to our Support team through the chat in the bottom-right corner. Let us know which domains you've allowed and what the User sees, and we'll help you track down anything that's still blocked.