In this scenario we have a protected card data environment with a couple servers in it. It doesn’t use any O365 services. We just use DUO for MFA to login to the server. The firewall in front of this CDE is completely locked down. If I don’t whitelis...

I checked and our ADFS Azure IP doesn’t match anything in the 40.126.0.0/19 subnet, so it’s not us. Do you guys have servers at Azure?

Our ADFS lives there. Interesting. But, I thought DUO did a directory sync of our AD creds to authenticate.

No, just trying to login to a server using multi-factor. If I don’t put in the 40.126.x.x range I never get the DUO Security screen for the Push, Call Me or Passcode. It just times out. We don’t use a proxy. I have a ticket open with Support, but the...

Unfortunately, my firewall can’t use an API hostname only IP addresses.