Microsoft Exchange and Active Directory Blog
The Exchange Health Checker is an excellent tool to get a quick overview of the status of the Exchange Server. The PowerShell script provided by Microsoft is continuously updated and can generate a report in HTML format. For a fresh Exchange 2019 installation on a Windows Server 2022, the report looks like this, for example: ... Read more
In a previous article, I described where the AMSI log files of the Exchange server can be found. As the logs are stored locally on the Exchange server, the logs are of little use if nobody reads them and attacks are only detected when it is too late. However, the logs can also be easily ... Read more
Exchange transport rules can be used to perform certain actions when receiving or sending emails. For example, mails can be redirected, rejected or provided with a disclaimer using a transport rule. There are many ways to implement certain actions for mails using transport rules, but with many transport rules it can quickly become a little confusing and it is not always clear which ... Read more
The company Ookla, with the well-known site speedtest.net for testing internet speed, also offers tools for the command line. The tool itself can deliver the output in JSON format and is therefore very suitable for passing the data on to various other applications. This allows you to create a nice overview of the Internet connection speed. I have a ... Read more
A reader recently told me about a problem with the Sophos UTM web application firewall. Due to the Corona crisis, many of the employees have moved to the home office and have since been using more connections to the Exchange server, which are protected by the WAF of the Sophos UTM. So after there was a higher load on the UTM during the day ... Read more
On several Windows 2019 servers, I have already had the problem that the PowerShell module "Posh-SSH" only returns an error message when establishing an SSH connection. I had this problem with Windows Server 2019 and the Posh-SSH module in version 2.2. Here is a quick tip on how to fix the problem. The error message is as follows: ... Read more
Attractive dashboards can be created with many different applications, such as Kibana and Grafana. However, dashboards can also be created directly with PowerShell. Ironman Software offers the "Powershell Universal Dashboard" module for this purpose. The Community Edition can be used free of charge and has only a few restrictions compared to the Enterprise Edition. Here is an overview ... Read more
Jan Kappen has written a great HowTo on the subject of Grafana, InfluxDB and PowerShell. Jan describes the installation, configuration and use of Grafana and InfluxDB on his blog: Grafana, InfluxDB and Windows PowerShell - Part 1 Grafana, InfluxDB and Windows PowerShell - Part 2 Grafana, InfluxDB and Windows PowerShell - Part 3 Grafana, InfluxDB and Windows ... Read more
In the last article, I had already announced that I would also like to use PRTG to monitor the web server protection of the Sophos UTM. Unfortunately, PRTG only offers generic sensors for the UTM, which makes monitoring a little more difficult. I've made some progress with the Sophos RESTful API, but unfortunately RESTful ... Read more
After updating my WLAN controller, I stumbled across a small problem. The WLAN controller is monitored using PRTG and a PowerShell script. After updating the controller, the script only returns the following error message: The request was canceled: No protected SSL/TLS channel could be created.... In this case it is the ... Read more
