Reverse SSH Tunnelling over SSL with the Raspberry Pi

In this blog I will go through the steps necessary to set-up an automatic reverse SSH tunnel between a client machine sitting in a restricted environment and a server that you control in your home/office/cloud. The reverse SSH tunnel will be encapsulated within a SSL tunnel over port 443 to evade network security appliances/firewalls.

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Random Password Generator in PowerShell

Here is a quick and dirty PowerShell script that you can use to generate pseudo-random passwords using dictionary words, numbers and special characters.

This kind of script is good for environments such as schools and universities where mass-enrolment is quite common before the start of the academic year.

You can incorporate the function in your own script or come up with something new.

Credit goes to for making the random word generator API available for public use.

The code is available on my GitHub page and is a good place to check for the latest iteration of code as well as some examples. Below is the code as of 14/06/2016

		Generate a random password
		Uses the random word API to generate random words. A random number and special character is then appended
	.PARAMETER numberOfPasswords
		Number of passwords to generate. Default is 1.
	.PARAMETER wordLength
		Word length. Default is 8.
	.PARAMETER allowedSpecialCharacters
		Special characters that are allowed to be appended to the password. Default is ! * and ?
		If defining your own, use the format:
		Generate-Password -allowedSpecialCharacters "!","?",",","/"
	.PARAMETER maximumNumber
		Default number to append to word will be between 0 and 999.
		PS C:\> Generate-Password
		This will generate a random 8 character word, append a number between 0 and 999 and finally append a special character.
		Additional information about the function.
function Generate-Password
		[Parameter(Mandatory = $false)]
		[int]$numberOfPasswords = 1,
		[Parameter(Mandatory = $false)]
		[int]$wordLength = 8,
		[Parameter(Mandatory = $false)]
		$allowedSpecialCharacters = @('!', '*', '?'),
		[Parameter(Mandatory = $false)]
		[int]$maximumNumber = 999
	for ($i = 1; $i -le $numberOfPasswords; $i++)
		$randomWord = Invoke-WebRequest -URI$wordLength
		$randomNumber = Get-Random -Maximum $maximumNumber
		$randomSpecialCharacter = $allowedSpecialCharacters | Get-Random
		Write-Output "$($randomWord.content)$randomNumber$randomSpecialCharacter"

Office 365 Quarantine Tool

If you find yourself using the Office 365 (Exchange Online) e-mail quarantine often then you probably know how frustrating and slow it can be to quickly find and release quarantined items. Often times you’ll find yourself waiting for a few minutes only to realise it’s not doing anything. Then you have to refresh the page and re-enter your search criteria. The fact you can’t even wildcard searches is also unforgivable (it’s 2016 Microsoft, why can we not wildcard search the subject and sender fields?!)

This annoyance coupled with my eagerness to play with PowerShell led me to develop a quick and dirty quarantine tool or viewer if you like. The tool is quite basic but it will let you do the following:

  • Wildcard search the subject and sender fields
  • Configure the number of results to return
  • Release a message based on message ID

2016-06-07 20_17_07-Office 365 Quarantine Tool v012016-06-07 20_19_19-Office 365 Quarantine Tool v01
If you want to have a play with the tool, it’s on my GitHub along with the source code if you feel like suggesting some improvements.