As a result of increasing projects, here is a little how to with the summary of my previous articles. The main points are:
- Azure AD Seamless Single Sign-On (PTA / PHS)
- SAML Authentication (Azure AD as IdP & Citrix Gateway as SP)
- Citrix Federated Authentication Service (FAS)
- Microsoft Azure Multi-Factor-Authentication with Conditional Access
Continue reading “SAML Authentication between Citrix & Microsoft with Azure MFA”
- Fully working Citrix Virtual Apps and Desktop Environment (StoreFront & DDC Minimum Version 7.9)
- Citrix ADC with successful base configuration & activated Enterprise or Platinum license (Minimum Version 12.1 Build 50+ for native workspace app, for browser Minimum Version 11.1)
- Configured Unified Gateway vServer
- Internal and external DNS entries for Unified Gateway vServer (e.g. citrix.deyda.net)
- Certificates for DNS entries (wildcard certificates are the easiest)
- Existing Azure Tenant with Azure-AD base configuration (Domain, AAD Sync) & activated Azure AD Premium license
- AD Connect version installed and configured (Minimum Version 1.1.644.0)
- Firewall release for *.msappproxy.net on port 443
- Domain administrator credentials for the domains that connected to Azure AD via AD Connect
- Installed Authenticator App on Test User Mobile Phone
The new current releases of Citrix Virtual Apps and Desktops, Workspace Environament Management & Citrix Provisioning are now available. They contains many new features compared to the last LTSR.
Continue reading “Citrix Virtual Apps and Desktops & WEM 2003 is released”
The scheduled update (ADV190023), regarding LDAP Signing and Channel Binding for new and existing domain controllers, scheduled for March 10, 2020, has been postponed to the second half of calendar year 2020. The March 2020 update will only provide additional auditing capabilities to identify and configure LDAP systems before they become inaccessible with the later update.
The later update results in no more connections to the domain controller, via unsigned / Clear Text LDAP on port 389. Then it is only possible to use either LDAPS via port 636 or Signed LDAP (StartTLS) on port 389.
Continue reading “ADV190023 – Enable LDAPS in Windows DC and Citrix ADC”
In the past months, I have had to deploy Microsoft Teams and OneDrive from the Office365 portfolio in Citrix environments, in addition to the standard office applications in numerous projects.
The standard installation, that the user can perform through the Office365 portal, is a user-based installation. In a Citrix environment, this is only recommended for desktop operating systems (pooled or personal desktop).
A user-based installation can be detected very quickly in the User Profile, since data is then located under AppData\Local\Microsoft\Teams.
This type of installation in a worker with server operating system has many disadvantages:
Continue reading “Install Teams & OneDrive in Citrix (Machine-Based)”
- No control over the installed version
- Several different versions possible on the same worker
- Complete data (~1 GB) is stored in the user profile
Citrix has released a critical vulnerability warning (CVE-2019-19781) in all Citrix ADC & Gateway systems one week before Christmas. Several working exploits have been released since Jan. 10, 2020 and are available to everyone.
Important ! The fix from Citrix with the Responder Policy does not work on systems with version 22.214.171.124/51.19, 50.31 and older. If this version is in use, please update to the latest 12.1 version.
The exploits allow remote code to be executed anonymously, allowing unauthenticated attackers to take over the various machines with root privileges.
Continue reading “Checklist for Citrix ADC CVE-2019-19781”