CentOS v.7 : Enabled/Disabled GUI at Boot-up

 CentOS v.7.0 : Enabled/Disabled GUI from Boot-up.

Enabled

1. systemctl get-default
2. systemctl set-default graphical.target
3. startx

Disabled

1. systemctl isolate graphical.target
2. systemctl set-default multi-user.target

Windows Server 2012 R2 : Azure AD Connect

 A. Ports requirements.

1. DNS = 53, TCP & UDP
2. Kerberos = 88, TCP & UDP
3. MS-RPC = 135, TCP
4. LDAP = 389, TCP & UDP
5. LDAP SSL = 636, TCP & UDP
6. SMB = 445, TCP
7. HTTPS = 443, TCP
8. WinRM = 5985, TCP
9. Azure Service Bus = 5671, TCP
10. Dynamic Port Range-RPC = 49152 ~ 65535, TCP (Random High RPC Port)

B. Minimum Hardware Requirements.

1. Objects < 10,000 = 1.6Ghz CPU, 4GB RAM, 70GB HDD.
2. Objects 10,000 ~ 50,000 = Same as above.
3. Objects 50,000 ~ 100,000 = 1.6Ghz CPU, 16GB RAM, 100GB HDD.
4. Objects 100,000 ~ 300,000 = 1.6Ghz CPU, 32GB RAM, 300GB HDD (required a full fledge SQL server).

C. Microsoft .NET Framework 4.5.1

D. Microsoft PowerShell 3.0 (PowerShell's Transcription Group Policy = Disabled).

E. Microsoft Windows Remote Management for ADFS = Enabled (required SSL certificate for ADFS).

Note: Microsoft recommended to install Azure AD Connect on domain joined server and not on a domain controller server.

But after some testing and installation trials, I found out that installation on a domain controller server is far much more easier to configure. Unsure will there be any security issues, but heck its only a test domain.

!!! HAPPY COMPUTING !!!