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Duo Two-Factor Authentication for Delinea (Thycotic) Secret Server

Last Updated: August 23rd, 2023


Delinea has partnered with Duo Security to add two-factor authentication via Duo Push, phone call, or passcode to Secret Server.

Duo and Secret Server

Duo Security’s authentication platform secures access to the Delinea (formerly Thycotic) Secret Server web console.

Connectivity Requirements

This application communicates with Duo's service on SSL TCP port 443.

Firewall configurations that restrict outbound access to Duo's service with rules using destination IP addresses or IP address ranges aren't recommended, since these may change over time to maintain our service's high availability. If your organization requires IP-based rules, please review Duo Knowledge Base article 1337.

Effective June 30, 2023, Duo no longer supports TLS 1.0 or 1.1 connections or insecure TLS/SSL cipher suites. See Duo Knowledge Base article 7546 for additional guidance.

First Steps

  1. Sign up for a Duo account.
  2. Log in to the Duo Admin Panel and navigate to Applications.
  3. Click Protect an Application and locate Thycotic Secret Server in the applications list. Click Protect this Application to get your integration key, secret key, and API hostname. (See Getting Started for help.)

Treat your secret key like a password

The security of your Duo application is tied to the security of your secret key (skey). Secure it as you would any sensitive credential. Don't share it with unauthorized individuals or email it to anyone under any circumstances!

Configure Duo Security in Secret Server

Refer to Duo Security Authentication in the Secret Server Documentation on the Delinea site. Follow the directions to configure Duo 2FA for Secret Server logins.

Once you configure Duo for Secret Server logins, you can also configure Duo Push approval for secret access requests. See Duo Push Notifications in the Secret Server Documentation for instructions.

Users of IBM Security Secret Server should refer to the "Duo Security Authentication" instructions in the Secret Server Documentation.

Test Your Setup

Log in to Secret Server as a user configured for Duo. You should see additional logon options as described in the Secret Server Documentation.


Need some help? Try searching our Knowledge Base articles or Community discussions. For questions about the Duo integration, try contacting Delinea Support. For further assistance with Duo, contact Duo Support.

Network Diagram

Secret Server Network Diagram

  1. Secret Server connection initiated
  2. Primary authentication
  3. Secret Server connection established to Duo Security over TCP port 443
  4. Secondary authentication via Duo Security’s service
  5. Secret Server receives authentication response
  6. Secret Server session logged in