However, in situations with load balancers and having hardened some of the AD FS servers, it may be tricky to get results from the right AD FS server.
This functionality can be easily assessed. When AD FS servers are improperly hardened, the functionality of the AD FS farm stops and/or monitoring of the AD FS servers stops. Needless to say, you deleted any *.pfx files you used to import these certificates from the hard disk, right? Possible negative impact (What could go wrong?) The private keys for the token encryption and token signing certificates provide additional levels of trust, depending on the configuration. In the end, the private key for the service communications certificate is trusted by all relying parties. They offer security translation, and as such can be abused to create claim tokens that misrepresent information towards cloud applications. Reasons whyĪctive Directory Federation Services (AD FS) servers are typically placed on the internal network, close to Active Directory Domain Controllers. It changes the default behavior of products and services to make them more resilient to unauthorized changes and compromise. Hardening provides additional layers to defense in depth approaches. However, as management of AD FS on Server Core installations is PowerShell-only, we also include information for AD FS Servers running Windows Server 2016with Desktop Experience (Full). This blogpost assumes you’re running AD FS Servers as domain-joined Windows Server 2016 Server Core installations.
This way, we lower their attack surfaces. In this part of the series, we’ll harden the AD FS Server installations, by disabling unnecessary services running on it. In this series, labeled Hardening Hybrid Identity, we’re looking at hardening these implementations, using recommended practices. Most Microsoft-based Hybrid Identity implementations use Active Directory Federation Services (AD FS) Servers, Web Application Proxies and Azure AD Connect installations.
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