Announcing a new series!!!

I recently got some YubiKeys from HQ (thanks @Peter) and since they provide all-in-one smart card (PIV) and OTP (OATH) capabilities plus they work great with Centrify products. 

Here are the series links:

Part 1: Securing Windows Server Access and Privilege Escalation with Centrify, Active Directory and YubiKey

Part 2: Securing local and remote access to UNIX/Linux with Centrify, Active Directory and YubiKey

Part 3: Using SmartCard (or YubiKey) to secure Apps, Shared Secrets an Sessions with CIS and CPS

About the Series

This new series showcases our  MFA Everywhere initiative and we'll be posting a series of HOWTO labs to cover several scenarios:

Strong Authentication (PKI) Smart Card / Yubikey

• Leverage what you have:  Active Directory, Microsoft CA, Group Policies
• Enforcing Smart Card access to UNIX/Linux/Mac systems  (Windows systems support this natively)
• Use DirectAuthorize roles to limit access to strongly authenticated sessions

Strong Authentication for Windows Privilege Elevation

• Applications
• Desktops

We already covered Access and Privilege Elevation For UNIX/Linux using Centrify MFA here:  http://community.centrify.com/t5/Community-Tech-Blog/LABS-Setting-up-the-MFA-for-Servers-feature-of-Centrify-Server/ba-p/22457

Strong Authentication (Smartcard/Yubikey) & OATH OTP access

• IdP Portal Access
• OnPrem or SaaS Application Access
• Privilege Portal Access
• Privilege Password Manager  (Shared Account Password Manager)
• Privilege Session Manager (Jump Box)

 Here's a quick overview/demo

Lab - Base Setup

The base setup is the pre-requisite for all the Yubikey/SmartCard related labs.

What you'll need

• Active Directory with Certificate Services
• A domain joined member server with Centrify Server Suite 2016
  • .NET 3.x features enabled
  • Feature RSAT:  Active Directory, Group Policy Management and Certificate Services tools
• One or two UNIX/Linux systems with Centrify Standard Edition 2016  (5.3+)  (if testing UNIX/Linux)
• Access to Centrify Standard Edition installation files (evaluation or licensed)
• Yubikey PIV Manager  (download link)
• Yubikey 4, NANO or NEO
• You need working knowledge of Active Directory and Centrify Zones

 Tip:  To set up a base configuration, you can build on the Microsoft Test Lab Guide.

Create Test Users and AD Group

On the member server

1. Open Active Directory Users and Computers and navigate to your desired OU
2. Right click and select New > User  and follow the wizard until the user is created.
3. Right click the newly-created user and select properties.  In the general tab, update the Email to match the user principal name.
   e.g. user@corp.contoso.com and press OK.
4. Right click the OU and select New > Group and make it a Global/Security group.  Call it "Smart Card Users"
5. Right click the Group, select properties, go to the Members tab, press Add and add the user created in step 2.
6. On the member server, grant the group or user the ability to log on remotely. 
   Computer > Properties > Remote Settings > Remote Desktop > Select Users  > Add > [select user or group] press OK twice.

Certificate Services

Modify the Smart Card User template

1. Open the Certification Authority console  (Start > Search > Certification Authority)
   If you get an error, retarget the console to the appropriate server (e.g. DC1)
2. On the left pane, right click "Certificate Templates" and select Manage.  This will open the Certificate Templates console.
3. In the template list, right-click the SmartCard User template and select "Duplicate Template"
4. In the General tab, give the template a descriptive name.  I used "Smart card User V2"  (this is the display name, the actual template name is SmartcardUserV2)
5. Click on the Security tab, press Add, select the newly-created Smart Card Users group, check the Enroll and Autoenroll boxes, then press OK and close the Certificate Templates console.

Publish the Newly-Created Template

1. In the Certification Authorities console, on the left pane, right click "Certificate Templates" and select New > Certificate Template to Issue
2. Select the newly-created version of the Smart Card User template  (e.g. Smart Card User v2) and press OK.

Provision the Smart Card User Certificate into your Yubikey

1. Log on to your member system with the test user.
2. Open the Yubikey PIV manager tool with the Test User  (shift+right click > run as different user)
3. If you're using a VM, connect the Yubikey to your virtual machine.
   Note:  If you're using VMWare, you need to add the parameter below for the Yubikey to be available to your VM.

   usb.generic.allowHID = "TRUE"

   This step is performed by editing the .vmx file and editing it with your current text editor while the VM is off.
4. Initialize the Yubikey if brand new.  Do not forget the PIN.
   
5. In Yubikey PIV manager, press Certificates > Generate New Key and make sure you type the Certificate Template name (not the display name) and press OK.
6. Type the PIN when challenged, and select your existing CA.  In my case I use the non HTTP link and press OK
   
   
7. To test the smart card authentication, either lock your screen or logoff.  If you can unlock or login successfully, you should be ready for the next steps.
   

Lab Verification Video