Aperture Script Memos

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Creating users with CSV file on Windows Server 2019 AD

  • Create the CSV file with ";" as delimiter
  • Create an OU container in your Active Directory server and record the location
  • Create a PowerShell script in the same location as the CSV file is located
  • Use the following script

Run with PowerShell:

# Import Active Directory module and import CSV File to list
Import-Module Active Directory
$import_users = Import-Csv -Path .\Users.csv -Header "FirstName","LastName","Password" -Delimiter ";"
# Start a loop and send each line of the CSV file to create a user
$import_users | ForEach-Object{
New-ADUser `
    -Name $($_.FirstName + " " + $_.Lastname) `
    -GivenName $_.FirstName `
    -SurName $_.LastName `
    -DisplayName $($_.FirstName + " " + $_.Lastname) `
    -SamAccountName $($_.FirstName.Substring(0,3).ToLower() + $_$.LastName.Substring(0,3).ToLower()) `
    -UserPrincipalName $($_.FirstName.ToLower() + "." + $_.LastName.ToLower() + "@example.com") `
    -AccountPassword $(ConvertTo-SecureString $_.Password -AsPlainText -Force)`
    -Path "OU=ExampleUsers,DC=example,DC=com" `
    -Enabled $True `
}

Blocking open resolver and enabeling WSUS Service on Windows Server 2019 AD

  • Disable recursive queries
  • Use the following script

Run with PowerShell:

# Script for allowing internal hosts to send recursive queries to a public DNS server
# Adding internal network IP addresses to the client subnet
# Creating a scope to enable recursion and where to send queries
# Creating policy for recursion matching client subnet and recursion scope
Add-DnsServerClientSubnet -Name InternalNetworkIP -IPv4Subnet 1.2.3.4 /n -IPv6Subnet aaa:bbbb:ccc::/64
Add-DnsServerRecursionScope -Name InternalRecursionScope -EnableRecursion $true -Forwarder 8.8.8.8, 2001:4860:4860::8888
Add-DnsServerQueryResolutionPolicy -Name InternalQueryPolicy -Action ALLOW -ApplyOnRecursion -ClientSubnet "EQ,InternalNetworkIP" -RecursionScope InternalRecursionScope
# Confirm configuration by showing DNS recursion policy, DNS recursion scope, and our query policy.
Get-DnsServerClientSubnet
Get-DnsServerRecursion
Get-DnsServerRecursionScope
Get-DnsServerQueryResolutionPolicy

Creating a CSV file with names

  • Copy names from Canvas from People > Group > Group start page > Group People into TXT file with ISO 8859-4 encoding.
  • Run the following script.

Run with Python 3.6 and higher:

# Python 3.8 Test script to extract student groups to CSV file to be opened with Excel.
# Make sure Encoding is set to ISO 8859-4 for both this script and TXT file.
import sys
from itertools import islice

FILENAME = "Group1Names.txt"
FILENAME2 = "Group2Names.txt"
GROUPFILENAME = "Studentgroups.csv"
def CSVFile(Group, FILENAME, GROUPFILENAME):
    Students = ""
    with open(FILENAME, 'rt') as f:
      for line in islice(f,0,None, 4):
        Students += ';'+line
    with open(GROUPFILENAME, 'a') as f:
      f.write(Group + Students)

CSVFile('Grupp 1;\n',FILENAME,GROUPFILENAME)
CSVFile('Grupp 2;\n',FILENAME2,GROUPFILENAME)

Creating a short status list script from systemctl status on CentOS 8

Run with Python 3.6 and higher on CentOS 8:

#!/bin/python3

# Import needed modules
import os
import subprocess

# Get terminalsize
TERMINALSIZE = os.get_terminal_size()
COLUMNLENGHT = TERMINALSIZE.columns

def StatusFilter(SERVICE):
    # Function that sends the systemctl status command to shell.
    # Saves output as a string and divides the string into lines.
    # Extracts the "Active:" line from lines and returnes it.
    CMD = 'systemctl status ' + SERVICE
    output = subprocess.check_output([CMD], shell=True, universal_newlines=True)
    OUT = output.splitlines()
    for line in OUT:
        if 'Active:' in line:
            return line

def ServiceStatus(LIST):
    # Loop the a list of services and prints them neatly.
    for elem in LIST:
        S = elem + ': '
            print(S.rjust(15), StatusFilter(elem.lower()))

# Stores a list of services to check status of.
LIST = ['SSHD','NFtables']

# Spacing and other strings to print
SPACING = '\n' + '='*COLUMNLENGHT +'\n'
SPACING2 = '\n' + '-'*COLUMNLENGHT + '\n'
HEADING = 'Status of installed/configured services:'

# Calles function to loop through desired services to print status.
print(SPACING)
print(HEADING.center(int(COLUMNLENGHT - 20)))
print(SPACING2)
ServiceStatus(LIST)
print(SPACING)
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