d-fens GmbH
Audit and Consulting of Information Systems and Business Processes
I am a senior auditor, consultant and architect at d-fens for business processes and information systems.
Recently I needed to check if a function was defined inside a script file. Reflection was my first thought, and PowerShell being a first class .NET citizen should be able to perform this. But as PowerShell is defined as an Abstract Syntax Tree (AST) it is even easier to achieve this. Inside the AST every block (BEGIN, PROCESS, END) is […]
There are several ways on how to create a PowerShell (script) module. And depending on your environment chances are high you are not the only developer contributing to a module. […]
Introduction This Graylog Output Plugin can send short messages (SMS) via the Clickatell Messaging Provider based on messages that are assigned to a specific stream in Graylog. It is based […]
Introduction This Graylog AlarmCallback Plugin can send short messages (SMS) via the Clickatell Messaging Provider based on alert conditions configured in Graylog. It is based on the new version 1 […]
Some time ago I mentioned an error and a possible workaround when using PowerShell with the Clickatell SOAP interface. As Clickatell now provides a REST based interface I thought it is time to quickly show you how to use this API instead. Description When sending SMS you certainly first have to enable the REST API in your developer central account. […]
This post describes how you can extend the Graylog2 AlertCondition mechanism to raise alerts based on the contents of a field (instead of just a message count or a field value). Introduction Currently Graylog2 only allows you to trigger AlarmCallbacks based on either MESSAGE_COUNT Here you define how many messages must be assigned to that stream before an alarm will […]
Introduction UPDATE 2015-02-26 The plugin now works with the Graylog v1 plugin API Following the article about Creating a Graylog2 Output Plugin this post will cover the steps needed to create a filter plugin for Graylog2. While the SCRIPT OUTPUT Plugin enabled a potential user to run scripts for post-processing of messages, the SCRIPT FILTER Plugin will be very creative […]
In this post I will quickly show you how to easily use drone.io and GitHub in combination with Docker to test your self developed Graylog2 plugins. Here is a brief […]
Introduction As described in my last post Sending Gelf messages to Graylog2 via PowerShell we were testing Graylog2 for log and meter collection. It soon became clear that the current […]
Recently I was testing Graylog2 as a store for metering data and had to bulk-load a larger amount of data into its database. My goal was to create synthetic and […]
Introduction While working on a project for one of our customers I had to perform some testing that involved one of the WSO2 product family members, namely the Complex Event […]
GENERAL This Microsoft PowerShell module contains Cmdlets to perform various base actions and utility/convenience functions against the Infoblox REST API (WAPI). You can download this module via GitHub at biz.dfch.PS.Ipam.Infoblox.Api or via NuGet with Install-Package biz.dfch.PS.Ipam.Infoblox.Api. DESCRIPTION This module uses Invoke-RestMethod internally. You can also use the functionality of the provided InfobloxApi.dll assembly that is more efficient. The current implementation […]
PowerShell makes it really easy to convert JSON into (PSCustom) objects with the means of ConvertFrom-Json. But manually verifying every property after conversion is particular tedious and annoying work. Recently I wrote about Using typeful JSON Deserialisation and Validation in PowerShell. However, sometimes this is just not feasible as you might not have a C# class describing your data. Scripting […]
As announced a couple of days ago we started pushing some of our PowerShell modules to GitHub and NuGet. And soon it became obvious that keeping all the scripts, signatures, versions and packages in sync was some tedious and error-prone work. This should definitely be automated, you might instantly think – and right you are! So here are some small […]
[Note] This is a rather old article from 2014. The world and PowerShell have changed. For an even easier way than presented here see the comment at the bottom of the article. In this post I present a quick refresher on how to make C# extension methods available to objects and classes in PowerShell sessions. C# allows you to extend […]
This is Microsoft PowerShell module is part of our Apache 2.0 based open source automation framework “Cumulus”. You will find all related posts via the “Cumulus” tag. You can use this module to perform operations against VMware vCenter infrastructure (the module makes use and abstracts VMware’s supplied PowerShell PowerCLI snapin). You can download the module on GitHub or on NuGet […]
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