Create a report on local DNS lookups using PowerShell

When troubleshooting a system, you sometimes need to know what DNS lookups are being done. This will give you a good insight into traffic from the systems to the local network or internet. You can do this with DNS auditing on your Windows server or in your local Pihole server, but that's not always available 😉 This blog post will show you an easy way to create a report without extra tools.

Create a TCP/UDP port listener using PowerShell

One of our customers is securing his network, and firewall changes were made that needed to be tested. In this case, the new servers were not yet deployed in that specific network. But... We did want to test the connections before deploying the servers 🙂 In this blog post, I will show you how to create listening ports on a machine to test the connection from another network using netcat on Linux or portqry on Windows.

Get WHOIS information using PowerShell

For the last few days, I have been working on an issue involving getting an overview of the networks and public IP addresses. Because I was unsure if the public IP addresses in some logs were from that company, I had to look up a lot of IPs manually using Ripe/Whois sites. This blog post shows you how to get details for your Public IP or the address or domain name you specify.