Transport Protocols: TCP and UDP

DNS and How does it work?

How Does the DNS Process Work?

• 

liquidweb.com/kb/how-to-demystify-the-dns-process/

DNS Security Overview

What is DNS, How it Works + Vulnerabilities

https://www.varonis.com/blog/what-is-dns/

How Does a hosts File Modification Work?

Reconfigure a machine to use domain for time sync

1) Open an elevated command prompt
2) Run commands:

w32tm /config /syncfromflags:DOMHIER /update
w32tm /config /syncfromflags:domhier /update /reliable:yes
w32tm /resync /nowait
net stop w32time
net start w32time

You can check the time source and state using:

w32tm /query /source
w32tm /monitor

Finding scripts in GPOs

https://vstepic.blogspot.com/search/label/AD

Check w32time services running status bulk machines

$servicename = “W32Time”

$list = get-content “C:\temp\Servers.txt”

foreach ($server in $list){

Get-Service $servicename -computername $server | select machinename, name, status -ErrorAction SilentlyContinue
}

HOWTO: Properly set and manage Azure AD Connect’s Export Deletion Threshold

HOWTO: Properly set and manage Azure AD Connect’s Export Deletion Threshold

An overview of Azure AD Connect’s PowerShell Modules and Cmdlets

An overview of Azure AD Connect’s PowerShell Modules and Cmdlets