If you've landed on sso-e695374e.sso.duosecurity.com, you're looking at a subdomain belonging to Duo Security, a major provider of multi-factor authentication now owned by Cisco. This specific URL acts as a redirect point for single sign-on (SSO) logins. It automatically forwards you to the central Duo authentication portal. That behavior is completely normal for this kind of service.
Unlike a typical public website, this page isn't meant to have an about section or contact details — it's a technical redirect, not a storefront. The fact that it blocks search engine crawlers is intentional and standard for login endpoints. The security here is solid: the connection is encrypted, the certificate is valid, and the site uses strong browser protections.
If your employer or a service you use sends you to this address, you can trust that it's part of the official Duo login flow. Just be sure the domain actually ends in duosecurity.com — that's the genuine parent. Any variation could be a phishing attempt. But for the real deal, this is safe.