How to fix ADFS error "Please turn on TLS 1.0, TLS 1.1 and TLS 1.2 in Advanced settings"

Recently I was doing so many tests on my ADFS lab and at one point, I basically got lost on my config and I did not remember what I had done. So, I got stucked in an ugly situation that my ADFS portal was not opening and it was giving an error in regards with TLS of my ADFS. Since I managed to fix that issue, I thought it is better to share this info with you in case you got yourself in same situation as me and you need a way out.

Relationship between ‘SPN Duplication’ and ‘Domain Join’ process

As you might already know, “Service Principal Names” plays an important role in authentication process of Active Directory. If you haven’t watched my video on Kerberos, I suggest you have a look at that video because I explain Kerberos and use of SPNs in Active Directory. However, I will produce a separate video dedicated to SPN later on, so make sure to follow my YouTube channel for more videos. Anyways, in this article, I am going to briefly talk about one of the common problems of authentication and consequently “Secure Channel” which falls to the category of “Duplicated SPN”.

 

Monitor health of DFSR and SYSVOL in your Active Directory

https://jorgequestforknowledge.wordpress.com/2014/08/01/fixing-adsysvol-replication-and-reconnecting-a-disconnected-ad-domain-part-6/There are quite number of tasks in which an Active Directory administrator should always perform regularly during the day. These task can be varied from performing backups to troubleshooting serious problems of an Active Directory environment. Talking about tasks, some people tend to patrol through the different areas like ‘Event Viewer’ to find more information about the health of the infrastructure, some other people including me or maybe you, prefer to use other methods to do these same tasks with maximum efficiency. Some clear example of these methods are using SCOM or PowerShell scripting.

Why secure channel can break in Active Directory?

As everybody know, ‘Secure Channel’ in Active Directory is a key factor for initiating communication between domain controllers and clients. It’s crucial to understand what ‘Secure Channel’ is before jumping on troubleshooting the issues related to this concept. In this video firstly I explain briefly what secure channel is and how it is created. So if you always wanted to know how secure channel is created don’t miss the video.

 

Can 'Unauthenticated' tag on NIC result to a broken secure channel?

Couple of days ago I noticed a strange behavior on network adapter of dozens of clients in my environment. The users were not able to authenticate to their workstations, throwing secure channel error. When one of the helpdesk administrators informed me about this issue, I thought it might be a typical problem of operating system including incorrect DNS configuration or duplicate names, but this was strange because basically everything related to secure channel were in place. Computer accounts were enabled in ADUC, DNS records existed, logintimestamps were updated and etc. So I tried digging in the problem to see what I can find.

The auditor of auditors: 'LepideAuditor Suite'

Today, in modern days of technology, the concept of auditing has become one of the interesting facts in Information Technology (IT). Back in days, when I was probably playing with my SNES, the concept of auditing was so hard to follow with built-in applications and consoles, but today, you can find many applications which either covers a specific part of auditing or support a huge number of services and applications. Among them, it is rare to find a solution which covers a whole range of services and audits, but ‘LepideAuditor Suite’ is one of those rare. In this article we will talk about this application.