Posts by category

• Category: .NET
  • Using Google Service Accounts in C#: Secure API Access Explained
  • Using MySQL Database for Blazor Server Web App
  • Running Blazor Server Web App on Linux and Apache
  • Run your App as Unix Daemon in Ubuntu
  • Run a .NET Core C# Console App on Ubuntu
  • Blazor Server – Basics Part 12 – Create a Native Blazor UI Toggle Button Component
  • Blazor Server – Basics Part 11 – Create a Native Blazor UI Toggle Switch Component
  • Blazor Server – Basics Part 10 – MS SQL Server Access and Data Binding
  • Blazor Server – Basics Part 9 – Responsive Tags and Chips
  • Blazor Server – Basics Part 8 – JavaScript interoperability (JS interop)
  • C# Events and Delegates
  • Blazor Server – Basics Part 7 – C# Events, Delegates and the EventCallback Class
  • Blazor Server – Basics Part 6 – Query the on-premise Active Directory
  • Blazor Server – Basics Part 5 – Authentication and Authorization
  • Blazor Server – Basics Part 4 – Program.cs File
  • Blazor Server – Basics Part 3 – Custom Layout
  • Blazor Server – Basics Part 2
  • Blazor Server – Basics Part 1
  • Code Signing in Visual Studio
  • Using Google’s OAuth 2.0 API for an ASP.NET Core Web App
  • Azure AD – App Registrations vs. Enterprise Applications
  • Create an ASP.NET Core Web App using Azure AD Authentication
  • Create an ASP.NET Web Application (.NET Framework – Web Forms or MVC) using Azure AD Authentication
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Core Web App (Model-View-Controller) by using OAuth 2.0 & OpenID Connect – Part 7
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Web Application (.NET Framework – MVC) by using OAuth 2.0 & OpenID Connect – Part 6
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Core Web Application (MVC) using WS-FED – Part 5
  • The current .NET SDK does not support targeting .NET Core.
  • Microsoft SQL Server LocalDB
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Web Application (.NET Framework – Web Forms) using WS-FED – Part 4
  • A fatal error occurred while creating a TLS client credential. The internal error state is 10013
  • Global Assembly Cache (GAC) and .NET Framework Insights
  • Load a custom Assembly in SQL Server Integration Services (SSIS) Script Task that is not or cannot be stored in the GAC
  • Accessing Azure Storage Account File Shares from C# Applications
  • Create a C# Console App (.NET Framework) to export Mail Attachments from an Exchange Mailbox
  • .NET – How the Runtime Locates Assemblies
  • Microsoft Windows SDK
• Category: AD CS
  • How to use a SubCA Certificate issued by our internal AD CS PKI for the Squid Forward Proxy to generate dynamic Host Certificates
  • How to request a Certificate from an internal PKI (AD CS) by using the Certreq Command without relying on the Web Enrollment service
  • Set up Checkmk on SUSE Linux Enterprise Server (SLES)
  • Automatically enroll Client Computer Certificates by using a GPO
  • Set up a 2-tier PKI in Active Directory Certificate Services (AD CS) – Part 4
  • Set up a 2-tier PKI in Active Directory Certificate Services (AD CS) – Part 3
  • Set up a 2-tier PKI in Active Directory Certificate Services (AD CS) – Part 2
  • Set up a 2-tier PKI in Active Directory Certificate Services (AD CS) – Part 1
  • Set up a Key Recovery Server for the Microsoft certification authority (CA)
  • Configure certificate auto-enrollment
  • PetitPotam NTLM Relay Attack – Mitigating NTLM Relay Attacks on Active Directory Certificate Services (AD CS)
• Category: AD DS
  • Active Directory Cheat Sheet essential Commands
  • How to enable Remote Desktop by using Group Policies
  • The Utilman.exe Hack combined with Windows Safe Mode to bypass XDR Solutions like CrowdStrike’s Falcon Sensor or Microsoft Defender for Servers
  • Set up Microsoft Entra Connect
  • Set up Split-Brain DNS in Active Directory
  • What is Multicast DNS (mDNS) and how does it work?
  • Impact of DNS Primary Suffix and DNS Suffix Search List on the DNS Name Resolution
  • Set up Windows DNS dynamic Updates
  • Set up Microsoft Defender for Identity
  • What is Microsoft Entra Workload ID?
  • What is Microsoft Entra Verified ID?
  • What is Microsoft Entra Permissions Management?
  • What is Microsoft Entra External ID (Azure AD External Identities)?
  • What is Microsoft Entra ID Governance?
  • What is Microsoft Entra ID?
  • Set up and deploy BgInfo from Sysinternals in your Network
  • Mastering Azure File Sync
  • Enroll Windows Computer into Microsoft Intune
  • AWS – IAM vs. IAM Identity Center vs. Directory Service
  • Office 365 Cross-Tenant Mailbox Migration (Corporate Merger Scenario)
  • Domain Controller Protection via BitLocker Drive Encryption
  • Windows Local Administrators Group Membership on Azure AD joined Devices
  • ZeroConfigExchange & ZeroConfigExchangeOnce
  • Prevent Members from Domain Users Group to Logon by default to any Domain joined Computers
  • Prevent Branch Office Domain Controllers from registering generic DNS Records and Netmask Ordering
  • Restore deleted Microsoft 365 Hybrid User
  • DFS Domain-based Namespace Folders are missing after replacing Domain Controllers
  • Force rebuild Active Directory Replication Topology across Site Links
  • Upgrade Windows Server 2016 Domain Controllers and AD Schema to Windows Server 2019 | Raise Active Directory domain and forest functional levels
• Category: AD FS
  • Set up Windows Hello for Business Hybrid Azure AD joined Devices
  • Disable Mandatory Windows Hello for Business Prompt on Azure AD joined Devices
  • How SAML 2.0 works
  • How OAuth 2.0 and OpenID Connect works
  • Modern Authentication Office 365
  • Set up Active Directory Federation Services (AD FS 5.0) – Identity Protocols used in AD FS – Part 8
  • Analyse AD FS SAML Claims with Fiddler
  • Set up an AD FS Federation Trust between two Organizations
  • Configure SAML SSO for Atlassian Confluence on-premises with ADFS
  • Set up Active Directory Federation Services (AD FS 5.0) – Certificate Requirements – Part 3
  • Set up Active Directory Federation Services (AD FS 5.0) – ADFS Reverse Proxy – Part 2
  • Set up Active Directory Federation Services (AD FS 5.0) – Internal ADFS Server – Part 1
• Category: Amazon Web Services (AWS)
  • AWS – Create a new Linux VM Instance and connect to using SSH
  • Google Cloud Organization vs. AWS Organizations vs. Microsoft Azure Management Groups
  • AWS VPC Routing
  • AWS AD Connector Directory – Domain Join
  • Set up AD Connector in AWS
  • Set up IPSec route-based S2S VPN between pfSense and AWS VPC
  • AWS Command Line Interface (AWS CLI)
  • AWS – Organizations and Control Tower
  • Installing or Updating the latest Version of the AWS CLI
• Category: Atlassian
  • SAML single sign-on for Atlassian Cloud with Azure AD
• Category: Azure Arc
  • Mastering Azure Monitor (Log Analytics) and Azure Resource Graph
  • Mastering Azure Update Manager – Part 4
  • Cheat Sheet Azure CLI and Azure PowerShell
  • How to onboard on-premise Server to Azure Arc by using a Site-to-Site IPSec VPN and Azure Arc Private Link Scope
  • Mastering Azure Update Manager – Part 3
  • Mastering Azure Update Manager – Part 2
  • Mastering Azure Update Manager – Part 1
  • How to rename Azure Arc-enabled Server
  • How to onboard on-premise Server (Azure Arc) and native Azure Server (VMs) to Microsoft Defender for Servers
  • How to set up Arc-enabled VMware vSphere
  • How to onboard on-premise Server to Azure Arc
• Category: Azure Monitor
  • Step-by-Step Guide: Monitor Scheduled Events for Azure Windows Virtual Machines
• Category: BGP
  • Build a Site-to-Site VPN between Azure and On-Prem by using pfSense on both Sites – No Azure VPN Gateway Required
  • Cross-Hub Connectivity in Google Cloud using HA VPN and NGFW Appliances
  • Step-by-Step Guide: Setting up Route Based S2S VPN between Azure and on-prem by using pfSense – Part 2
  • Step-by-Step Guide: Setting up Route Based S2S VPN between Azure and on-prem by using pfSense – Part 1
  • Mastering BGP between Juniper and Azure
  • Mastering BGP between Check Point and Azure
  • Mastering Azure Firewall Forced Tunneling Configuration
  • Set up an Azure Hub-Spoke Network Architecture by using Azure Firewall and S2S IPSec VPN Cross-premises Network Connection
  • Set up an IPSec route-based Site-to-Site VPN Tunnel between Azure and On-Premise (Home Network) where the VPN Gateway sits behind a NAT Router
  • Azure VNet Routing
  • Set up Dynamic Routing with FRR (Free Range Routing) in pfSense – OpenBGPD now Depricated
  • IPSec dynamic route-based S2S VPN Tunnel between two pfSense Appliances
• Category: Blazor Server
• Category: brief
  • Updating VMware Tools to 13.0.5 manually on Ubuntu 24.04 (Headless Build – without GUI)
  • pfSense and APIPA (169.254/16): Enabling Link-Local Transit Networks for IPsec VTI and BGP
  • Cheat Sheet Google Cloud gcloud CLI 
  • How to install Azure CLI on Linux
  • How to install Azure PowerShell on Linux
  • Install PowerShell Modules offline
  • Using Custom CSS in MediaWiki from Version 1.35 and newer
  • Preventing Powered-Off Virtual Machines from Auto-Starting in vSphere HA
  • Check TLS Version on VMware vCenter Server
  • How to check for new Updates on Windows Server without automatically installing them
  • Windows Cheat Sheet for essential Commands
  • Mastering icacls and takeown
  • How to elevate access to an Azure Subscription when you have assigned the Global Administrator Role in Microsoft Entra ID
  • Linux handles SSH and SFTP Port Specification different
  • The vMotion interface is not configured (or is misconfigured) on the Source Host
  • How to Retrieve a Previous Hostname in Windows: A Quick Guide
  • WordPress Draft Page not showing – There has been a critical error on this website.
  • .Bashrc vs .bash_profile (or just .profile)
  • Install VMWare Tools for pfSense in vSphere
  • VMware ESXi/vCenter change /etc/hosts by using the ESXCLI
  • Linux Execute Shell Scripts – Source script.sh vs ./script.sh vs exec ./script.sh vs. bash script.sh
  • What is PowerShell Dot Sourcing?
  • What’s the Difference in Linux between the Commands SU – vs. SU without the Dash
  • Using Match Directives in SSH (Secure Shell)
  • Changing SSH Port on SELinux – Error: Bind to port failed: Permission denied
  • Regenerate Self-Signed ESXi Host Certificates after changing Hostname
  • Linux LVM – Remove Volume Groups and Logical Volumes
  • Linux LVM – Rename Logical Volumes
  • Linux LVM – Create a new Volume Group and Logical Volumes
  • Best Practice for vCenter Server Version and ESXi Host Version
  • Cheat Sheet – File System Commands in Linux
  • Turn off read receipts in Microsoft Teams
  • YaST (Yet another Setup Tool) Line Distortion on PuTTY Clients
  • Extend ESXi Host Trial (Evaluation) License Expiration
  • Create Anchor (aka Jump) Links in WordPress
  • VMware vCenter Server Appliance – Failed to start file system check on /dev/disk…
  • How to disable Certificate Revocation Check for Windows SSTP VPN?
  • How to Run and Launch a Java JNLP File on Windows
  • Configure Expires HTTP Headers and Cache-Control on Apache
  • New subscription structure for Microsoft 365 in Europe
  • Open Snipping Tool by default when pressing the Print Screen (PrtSC) Key in Windows 10/11
  • Enable Python for Apache Websites
  • Export/Import PuTTY Settings and Sessions
  • Hot Potato vs Cold Potato Routing
  • The trust relationship between this workstation and the primary domain failed
  • OwnCloud Files not showing up in the Browser
  • Visual Studio Yellow Triangle NuGet Package Missing Dependencies
  • Linux Sudoers (sudo command) File
  • Determine Data Location from your Microsoft 365 Tenant
  • Control automatic external email forwarding in Microsoft 365
  • Cloud Computing – Hyperscaler
  • Convert pfSense into a Routing Only Platform
  • Secure WordPress with fail2ban
  • Remote Desktop Services (RDS) – Published RDP Icon is gone after publishing further Remote Apps later
  • pfSense 2.6.0 Upgrade results on Hyper-VMs in very slow network speed
  • MySQL – Access denied for user ‘root’@’localhost’
  • Azure AD Connect – Unable to validate credentials due to an unexpected error.
  • Teams PowerShell several Cmdlets doesn’t work – ErroUnable to cast object of type ‘System.Management.Automation.PSListModifier’ to type ‘System.String’
  • Upgrade Windows Server from Standard to Datacenter on the fly
  • Deleting Windows Folder recursive will failed with Access Denied
  • Licensing mode for the Remote Desktop Session Host is not configured.
  • Adjust a Date from Past or Future on Windows Server permanently
  • Enable External Users for booking and adding Exchange Room Calendars
  • Install Ubuntu as Hyper-V Generation 2 Virtual Machine
  • Bypass Exchange Room Mailbox Delegation for specific Users
  • pfSense Boot Loop after Power Outage
  • SSH Session Timeout – TCP Keepalive
  • Azure Stack Hub, HCI and Edge
  • Microsoft SQL Server – FCB::Open failed: Could not open file mastlog.ldf for file number 2. OS error: 5(Access is denied.)
  • Task Scheduler Task returns 0x1 for Batch File
  • Longest Prefix Match aka Maximum prefix length match
  • Exchange/Outlook Download Offline Address Book Error 0x80190194
  • Window 10 Activity History – How to View and Delete
  • Assign Microsoft 365 Licenses to a Group instead to each user by hand
  • MiB and GiB vs. MB and GB momory size notation – What’s the Difference?
  • Azure AD – Federated Domain vs. Managed Domain
  • Exchange Online – Plus Addressing
  • Exchange Classic Full Hybrid – Not all Mailbox Permissions fully supported and Automapping
  • pfSense – enable the Thermal Sensors to display the CPU Temperature on the Dashboard
  • Microsoft Teams exploratory License
  • Exchange Server 2019 – Database Copy Component (HighAvailability) State is offline
  • Bypass spam filtering in Exchange Online (Office 365) for specific Sender Domain
  • pfSense 2.5.0 Bug – Router Advertisements Server is active by default on internal LAN Interface – Multiple Errors like – Renaming of LAN Interface or setting up OpenVPN Server runs into an error regarding IPv6 Configuration
  • SCCM (System Center Configuration Manager) slow or stucking Console/GUI
  • Microsoft Teams Direct Routing – Call Forwarding – AudioCodes Mediant VE SBC with DTAG SIP Trunk – Message Manipulation – Change displayed number from forwarded Calls
  • Dell iDRAC RAC0225: Sending the test mail failed
  • ACL , ACE , DACL, SACL, MAC and RBAC
  • Let’s Encrypt certbot-auto depricated
  • Set and Change the PowerShell default Working Directory
  • Azurite emulator – emulating Azure Blob, Queue and Table services in your local environment
  • Asynchronous Programming in C#
  • Using a generic List with a custom data type in C#
  • Using an array with a custom data type in C#
  • Using List Tuples in C#
  • pfSense enable Logging for Firewall Rules to log internal Client IPs
  • msiexec – Uninstall broken Installations
  • RDS Remote Desktop Services HTML 5 Client Setup
  • Replace the self-signed Remote Desktop Certificate with an PKI Certificate from your internal CA
  • What is the WoW64 (Windows 32-bit on Windows 64-bit) Subsystem?
• Category: C#
  • Accessing Azure Storage Account Blobs from C# Applications
• Category: Cheat Sheets
  • Cheat Sheet NetApp ONTAP – Commands used in day-to-day operations
  • Cheat Sheet – User Management Commands in Linux
  • Cheat Sheet Windows Control Panel Tool Commands (*.cpl)
  • Linux Cheat Sheet for essential Commands
  • Cheat Sheet Vi & Vim Editor
• Category: Check Point
  • Step-by-Step Guide: Setting up a route-based S2S IPSec VPN Tunnel between Azure and On-Premise by using the Check Point GAiA Security Gateway for the on-premise VPN Device
  • Step-by-Step Guide: Setting Up Check Point GAiA as Security Gateway
• Category: Dell PowerEdge
  • Adding and Configuring a new ESXi Host in vSphere (vCenter server)
  • Set up and Configure a VMware ESXi Host – Part 2
  • Set up and Configure a VMware ESXi Host – Part 1
  • Update Firmware, UEFI and Device Drivers for Dell PowerEdge Servers by using the Dell iDRAC Lifecycle Controller
  • Update Firmware, UEFI and Device drivers for IBM x3650 M5 (5462) Server by using the Lenovo XClarity Essentials UpdateXpress
  • Update Firmware and UEFI for IBM x3650 M4 Server by using the Lenovo XClarity Essentials Bootable Media Creator
• Category: DevOps
  • Infrastructure as Code (IaC) – Part 6 – Terraform
  • Infrastructure as Code (IaC) – Part 5 – Azure Automanage Machine Configuration (formerly called Azure Policy Guest Configuration)
  • Infrastructure as Code (IaC) – Part 4 – Azure Automation State
  • Infrastructure as Code (IaC) – Part 3 – Desired State Configuration (DSC)
  • Infrastructure as Code (IaC) – Part 2 – Azure Resource Manager (ARM) templates
  • Infrastructure as Code (IaC) – Part 1
• Category: E-Mail
  • Set up Microsoft Defender for Office 365 
  • Email Authentication by using DMARC, DKIM and SPF
  • Set up DMARC (verification) for Postfix on Ubuntu
  • Set up DomainKeys Identified Mail (DKIM) for Exchange Online
  • Configure Postfix to block and reject Unsolicited Messages or Spam
  • Set up SPF and DKIM for Postfix on Ubuntu
  • How to reject Emails in Office 365 they fail DMARC
  • Set up DomainKeys Identified Mail (DKIM) on Exchange on-premise
  • Set up Exchange on-premise to relay outbound Emails to the Internet via Exchange Online Protection (EOP)
  • Enable TLS for Postfix on Ubuntu
  • Setup Postfix Mailserver with Dovecot and MySQL on Ubuntu 18.04.4 LTS Step by Step
• Category: Exchange
  • Offboarding Microsoft 365 Hybrid – Move to Cloud Only
  • Configure Free/Busy Cross Request (Exchange Online and Exchange on-premise) when both Organizations are Hybrid
  • Configuring federated sharing (free/busy calendar information) between Exchange Hybrid Organizations
  • Configuring federated sharing (free/busy calendar information) between on-premise Exchange Organizations
  • Removal of Exchange Certificate (New-,Renew-,Import-,Export-) Handling in Exchange Admin Center (EAC) Console
  • Outlook 2016/2019 Click to run – Adding multiple Office 365 E-Mail Profiles – Sorry, another account from your organization is already signed in on this computer
  • Renew Edge Subscription in Exchange Server after Cumulative Update
  • Appendix – Azure AD Connect Sync Errors Detected – Large Attribute – Extension thumbnailPhoto
  • Azure AD Connect Sync Errors Detected – Large Attribute – Extension thumbnailPhoto
  • Enable Hybrid Modern Authentication for on-premises Skype for Business and Exchange servers – Part 2 SFB
  • Enable Hybrid Modern Authentication for on-premises Skype for Business and Exchange servers – Part 1 Exchange Server
  • Microsoft 365 Admin Center – Annoying Warning and Status Messages you can ignore
  • Exchange Online – We are preparing a mailbox for the user – Accounts still have an on-premise Mailbox and ExchangeGUID is synced successfully to Office 365
  • error – The connection to the server could not be completed | MRS Proxy Server
  • Migration from onPremise to Office 365 – Part 4 -Troubleshoot Exchange Hybrid
  • Migration from onPremise to Office 365 – Step by Step – Part 3- Move Users from Exchange onPrem to Exchange Online
  • Migration from onPremise to Office 365 – Step by Step – Part 2- Exchange onPrem to Exchange Online (Exchange Hybrid Classic Full)
  • Migration from onPremise to Office 365 – Step by Step – Part 1 – Azure AD Connect
• Category: Failover Clustering
  • Mastering Hyper-V Clusters with iSCSI and Multipath I/O (CSV)
  • Mastering Hyper-V Clusters with Storage Spaces Direct (S2D)
  • How to set up and provision Storage to Hosts by the IBM Storwize V3700 Storage System
  • Replicate Virtual Machines between different Data Center by using Veeam Backup and Replication
  • Migrate Virtual Machines between different Hypervisors by using Veeam Backup and Replication Instant VM Recovery
  • Set up Azure Hyper-V Server 2022 for Nested Virtualization
  • Set up and Deploy a VMware ESXi Host Cluster and Datastore Cluster
  • Set Up iSCSI Virtual Disks as Shared Storage for an ESXi Host Cluster
  • How to Set up a Microsoft Hyper-V Cluster
  • Set up a Microsoft iSCSI Target Server
• Category: Fax Server
  • Set up GFI FaxMaker with XCAPI and AudioCodes Mediant VE SBC with DTAG SIP Trunk
  • Set up AudioCodes Fax Server and Mediant VE SBC with DTAG SIP Trunk
• Category: FreeBSD
  • Deploying pfSense in Azure – A Step-by-Step Guide to Your Own Cloud Firewall
  • Deploying pfSense in Google Cloud – A Step-by-Step Guide to Your Own Cloud Firewall
  • Set up an NFS Server in Windows Server 2022
  • Enable X11 Forwarding with PuTTY and the Xming X Server for Windows
  • Linux Hard Link vs. Soft Link (Symlink, Symbolic Link)
  • Set up a Central Log Server with syslog-ng daemon on FreeBSD
• Category: General
  • Understanding Identity Mapping in NetApp ONTAP – Windows, UNIX, and Kerberos Users
  • Protecting On-Prem ONTAP with NetApp Console Backup and Recovery
  • Understanding NetApp ONTAP Logging – Exploring EMS Events and the ONTAP Event Log
  • Bringing ONTAP On-Prem into NetApp Console – Managing a vSphere ONTAP System from the Cloud
  • Offboarding NetApp Cloud Volumes ONTAP in Azure – A Clean Decommissioning Guide
  • File Locking in NetApp ONTAP: SMB, NFS and Troubleshooting Stale Locks
  • Hybrid Replication with SnapMirror: From On-Prem ONTAP to Azure Cloud Volumes ONTAP
  • Why VMware vMotion doesn’t break your Network: Understanding RARP and MAC Table Updates
  • Mastering Nested Junction Paths: Qtrees and Export Policies in NetApp Cloud Volumes ONTAP (CVO)
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 8 – Disaster Recovery
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 7 – AutoSupport & Active IQ (Digital Advisor)
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 6 – Upgrade Cloud Volumes ONTAP
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 5 – Backup and Recovery
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 4 – Antivirus VSCAN Configuration
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 3 – Configuring Data Services
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 2 – Deployment in Microsoft Azure
  • Deploying NetApp Cloud Volumes ONTAP (CVO) in Azure using NetApp Console (formerly BlueXP) – Part 1 – NetApp Onboarding
  • How to Migrate to Microsoft Entra’s New Unified MFA and SSPR Policies
  • Mastering Azure Load Balancer
  • Understanding pfSense IPsec Identifiers: When Public IPs Aren’t Enough
  • Mastering Windows Updates & Microsoft Updates – Part 3 – Controlling Automatic Updates in On-Prem and Cloud Environments
  • Mastering Azure DNS
  • Building a Centralized Egress and Hybrid Connectivity Hub with Network Connectivity Center (NCC), HA VPN, and a Router Appliance in Google Cloud
  • Mastering GCP Virtual Machines – Part 9 (Outbound Internet Access)
  • Mastering GCP Virtual Machines – Part 8 (Networking Best Practices)
  • Mastering GCP Virtual Machines – Part 7 (Backup and DR)
  • How to Check if the Firewall Is Active on Linux (Across Different Distributions)
  • Legacy Linux VMs and the udev NIC Trap: Why VMware Clones and OVF Exports Lose Networking
  • Mastering GCP Virtual Machines – Part 6 (Patching)
  • Mastering GCP Virtual Machines – Part 5 (Network Analyzing)
  • Mastering GCP Virtual Machines – Part 4 (Disk Encryption and Export)
  • Azure Automation – Virtual Machine Start/Stop Schedule
  • Using Azure Key Vault for Passwords in Azure Bastion
  • How to use the Serial Console and Special Administration Console (SAC) for VMware vSphere Windows Virtual Machines
  • Mastering Windows Updates & Microsoft Updates – Part 2
  • Mastering Windows Updates & Microsoft Updates – Part 1
  • Step-by-Step Guide Part 6: How to build your own NetApp ONTAP 9 LAB – NFSv4 Pitfalls
  • Step-by-Step Guide Part 5: How to build your own NetApp ONTAP 9 LAB – Root Squashing
  • Mastering GCP Virtual Machines – Part 3 (Connect to Windows VMs)
  • Mastering GCP Virtual Machines – Part 2 (Connect to Linux VMs)
  • Mastering GCP Virtual Machines – Part 1
  • Step-by-Step Guide: Setting up Classic VPN with Static Routes between Google Cloud and On-Prem by using Juniper vSRX3
  • Step-by-Step Guide: Setting up HA VPN with BGP between Google Cloud and On-Prem by using Juniper vSRX3
  • VMware vSphere boot loop when trying to boot from Windows Server 2025 ISO
  • Installing and running Windows 11 on VMware vSphere
  • Step-by-Step Guide: Setting up a route-based S2S IPSec VPN Tunnel between Azure and On-Premise by using the Juniper vSRX3 Appliance for the on-premise VPN Device
  • Step-by-Step Guide Part 4: How to build your own NetApp ONTAP 9 LAB – Day-to-Day Operations
  • Step-by-Step Guide Part 3: How to build your own NetApp ONTAP 9 LAB – Using NetApp ONTAP as iSCSI Storage for vSphere
  • Step-by-Step Guide Part 2: How to build your own NetApp ONTAP 9 LAB
  • Step-by-Step Guide Part 1: How to build your own NetApp ONTAP 9 LAB
  • Simple UDP Messaging in PowerShell or Ncat: Build your own Listener and Sender
  • Upgrade VMware Tools across vSphere by using the Offline Bundle
  • Register SQL Server Installation with Azure and using Azure Update Manager for Patching
  • What is the Azure Instance Metadata Service (IMDS)?
  • Step-by-Step Guide: Setting Up Juniper vSRX3 Appliance
  • Set up a Central Log Server with syslog-ng daemon on SUSE Linux Enterprise Server
  • resize2fs Superblock Checksum Error – What It Means and How to Fix It
  • VMware Public Patch Repository URLs were deprecated as of April 23, 2025
  • Mastering Azure Managed Identities
  • Mastering NFS Protocol Versions and analyze required Traffic
  • Introduction to Azure Service Principals – How to create and how to use them
  • Mastering Expert Partitioning on SUSE Linux Enterprise Server 15
  • Set up the Squid Proxy Server as a Transparent Proxy on SUSE Linux Enterprise
  • Azure Migrate – How to migrate on-premises VMware vSphere Virtual Machines to Azure (agent-based) – Part 5
  • Set up the Squid Proxy Server on SUSE Linux Enterprise
  • How to boot Linux from an Installation/Live CD to either repair a broken System or just to reset the Root Password
  • Set up an Azure Storage Account and Blob Storage for NFS Access by using a Private Endpoint
  • Set up an Azure Storage Account and Blob Storage for SFTP Access by using a Private Endpoint
  • Mastering Linux DM Multipathing and iSCSI Block Storage on Red Hat Enterprise Linux
  • Mastering Linux DM Multipathing and iSCSI Block Storage on SUSE Linux Enterprise Server
  • Back up VMware VMs with Azure Backup Server
  • How to install Checkmk Extension Packages (MKPs)
  • How to set up a Custom Certificate on the Dell PowerVault ME5024 Storage Array
  • Mastering iPerf on Linux and Windows
  • Mastering vSphere Lifecycle Management (vLCM)
  • How to mount SMB Shares on Linux
  • How to enable Microsoft Entra ID Authentication by manually publishing Users into the vCenter Identity Broker (vIDB) and not by SCIM
  • How to enable Microsoft Entra ID Authentication for vCenter Server by using the VMware Identity Service (Entra ID App)
  • How to enable Microsoft Entra ID Authentication for vCenter Server by using the on-premises SCIM App by Microsoft
  • Adding Windows Display Language for Windows Server without Internet Access
  • How to replace the ESXi Certificate with a Custom Certificate
  • How to renew/regenerate the vCenter Server Certificate
  • Analyzing VMware Storage Performance: From Latency to IOPS
  • How to change the vmxnet3 link speed of a Virtual Machine running in VMware vSphere
  • How to Create a Custom ESXi Boot ISO Image with VMware Flings USB Network Drivers injected
  • Advanced Cross vCenter Server vMotion (XVM) Capability
  • How to expand the Windows OS Partition when there is a Recovery Partition directly placed behind
  • How to update/upgrade vCenter Server (VCSA) by using the vCenter Server Appliance Management Interface (VAMI)
  • How to set up Dante SOCKS5 Proxy on SUSE Linux Enterprise Server
  • Using a Jump Host (Bastion Host) for SSH (Secure Shell)
  • Set up NIC Teaming in Windows Server
  • Mastering the mitmproxy (MITM interactive HTTPS Proxy) on Linux
  • Mastering Oracle Linux Updates and Repos
  • How to change VMware Disk Provisioning (Thick/Thin) afterwards
  • Veeam Backup & Replication – Permanent failover failed – Error: There is no oib with id
  • Troubleshooting Erros during the Execution of Java Applets using the Java Network Launch Protocol (JNLP)
  • How to elevate a Linux User Account with Sudo Rights
  • Mastering TShark (WireShark) in SUSE Linux Enterprise
  • Perform a clean Deinstallation of VMware Tools manually in Windows Guest OS
  • How to determine which Uplink (physical NIC) a Virtual Machine is using finally to send Uplink Traffic in vSphere
  • How to install Root Certificates on Linux
  • Azure Virtual Machines Stopped vs. Stopped (Deallocated)
  • Set up Microsoft Entra Application Proxy to publish Remote Desktop (RDS)
  • Mastering Microsoft Entra Application Proxy
  • Set up SUSE Linux Enterprise Server 12
  • Mastering Azure Application Gateway
  • Azure Migrate – How to migrate on-premises VMware vSphere Virtual Machines to Azure – Part 4
  • Azure Migrate – How to migrate on-premises VMware vSphere Virtual Machines to Azure – Part 3
  • Azure Migrate – How to migrate on-premises VMware vSphere Virtual Machines to Azure – Part 2
  • Azure Migrate – How to migrate on-premises VMware vSphere Virtual Machines to Azure – Part 1
  • Set up an Azure Storage Account and Blob Storage for SFTP Access
  • Set up Azure Site Recovery for On-Premise VMware Virtual Machines (Modernized) – Part 4
  • Set up Azure Site Recovery for On-Premise VMware Virtual Machines (Modernized) – Part 3
  • Set up Azure Site Recovery for On-Premise VMware Virtual Machines (Modernized) – Part 2
  • Set up Azure Site Recovery for On-Premise VMware Virtual Machines (Modernized) – Part 1
  • How to delete an Inaccessible Datastore in vSphere?
  • Using USB Hard Disk Drives for Datastores in vSphere
  • Set up Red Hat Enterprise Linux 9.4 Server
  • How to deploy a vSphere Distributed Switch in vCenter
  • Set up a SFTP Server on SUSE Linux Enterprise Server
  • Mastering Network Configuration in SUSE Linux Enterprise Server
  • Mastering Linux NetworkManager and its nmcli
  • Register SUSE Linux Enterprise Server with SUSEConnect to the SUSE Customer Center (SCC)
  • Mastering the Firewall on SUSE Linux Enterprise Server
  • Enable Timestamps for Linux History Command
  • How to monitor Windows Clients in Checkmk
  • How to monitor VMware vSphere Environments in Checkmk
  • Restore/Register a VM or VM Template in vSphere
  • Deleting Azure Recovery Services Vault failed
  • Set up Azure Bastion
  • How to repair an Azure VM offline
  • How to run Azure VMs in Safe Mode – RDP Service not available in Safe Mode – Using the Serial Console and Special Administration Console (SAC) for Azure VMs
  • Veeam Backup and Replication v9.5 Installation on Windows Server 2022 – Error occurred during certificate processing
  • How to extend LVM Logical Volumes stored on extended Disk Partitions instead on whole initialized Disks by using Growpart
  • Enable the Enhanced vMotion Compatibility (EVC) Mode for a vSphere Clustertest
  • Upgrade the VMware vSphere Environment from Version 7 to 8 – Part 2 – Upgrade ESXi Hosts
  • Upgrade the VMware vSphere Environment from Version 7 to 8 – Part 1 – Upgrade vCenter Server Appliance
  • Set up VMware Server in VMM
  • Running System Center 2022 Virtual Machine Manager (SCVMM)
  • Set up System Center 2022 Virtual Machine Manager (SCVMM)
  • Set up an NFS Server on SUSE Linux Enterprise Server 15
  • How to reset a forgotten or not knowing Root Password for Linux by using the GRUB Boot Loader
  • vSphere Linux Virtual Machines – Extend Disks, LVM Logical Volumes and the File System
  • VMware Virtual Machine using dedicated EFI System Partition Disk boots directly into GRUB2 Command Shell instead of booting the OS
  • Export/Import Virtual Machines in VMware vSphere
  • How to provision Storage to Linux Hosts by the IBM Storwize V3700 Storage System
  • Restore On-Premise Virtual Machines to Microsoft Azure by using Veeam Backup and Replication
  • Set up SUSE Linux Enterprise Server 15
  • Set up a new WordPress Site at Kinsta
  • Set up a VMware vSphere Environment – Part 2
  • Set up a VMware vSphere Environment – Part 1
  • Virtual Local Area Networks (VLANs) – Basics about Network Segmentation, inter-VLAN Routing & VLAN ACLs
  • Microsoft Sentinel – a Cloud native SIEM Solution
  • Software Defined Data Center (SDDC) vs. Private Cloud
  • Explore the Microsoft Defender Family
  • Set up Microsoft Defender for Endpoint
  • Set up Microsoft Defender for Cloud
  • Set up and deploy BgInfo from Sysinternals by using Microsoft Intune
  • How to enroll already Microsoft Entra joined (former Azure AD joined) Devices to Microsoft Intune?
  • Microsoft Graph PowerShell
  • What is Azure Arc-enabled servers?
  • What is Microsoft Entra?
  • What is Microsoft Entra Global Secure Access (Private Access)?
  • What is Microsoft Entra Global Secure Access (Internet Access)?
  • Default outbound access for VMs in Azure will be retired on 30 September 2025 – How to transition to an explicit method of public connectivity
  • Change Display Name in Azure for Azure AD joined Computers
  • Azure Migrate – How to migrate on-premises Hyper-V Virtual Machines to Azure
  • Set up Redis Object Cache on Ubuntu for WordPress and the LiteSpeed Cache Plugin
  • How Azure AD Privileged Identity Management works?
  • Network Security Groups (NSG) vs. Application Security Groups (ASG)
  • Sysinternals and its PsExec Tool
  • Configuration Manager – Management Point Critical Error
  • Re-Create ConfigMgr SQL Server Indentification Certificate
  • Co-Management with Microsoft Endpoint Configuration Manager and Microsoft Intune
  • UDP hole punching, ICE, STUN & TURN
  • Set up WireGuard Site-to-Site VPN on pfSense
  • Set up WireGuard Point-to-Site VPN on pfSense
  • VNet Peering between different Azure Active Directory Tenants
  • Set up Google Cloud Directory Sync
  • IBM x3650 M4 – RAID5 HDDs fail with preserved cache retained
  • RDP to Azure Active Directory joined Windows 10 Computer
  • How to reveal hidden WLANs (Hidden SSID)
  • Google Cloud VPC Routing
  • Azure – Create a new Linux VM and connect to using SSH
  • Google Cloud – Connect to Linux VMs directly without Metadata or OS Login
  • Google Cloud – Connect to Linux VMs using SSH OS Login
  • Google Cloud – Create a new Linux VM Instance and Connect to using SSH Metadata
  • Google Cloud – Create and Connect to a new Windows VM Instance
  • Set up IPSec route-based S2S VPN between pfSense and Google Cloud VPC
  • Set up your Organization for Google Cloud Part II
  • Working Basics with the Google Cloud Platform (GCP)
  • Microsoft Azure Management Groups
  • Join Ubuntu to an Active Directory Domain using SSSD (System Security Services Daemon)
  • Google Cloud CLI (gcloud)
  • Google Cloud – Admin Console vs. GCP Console
  • Google Cloud Identity
  • Set up your Organization for Google Cloud
  • Create a new Device Collection in System Center Configuration Manger (SCCM) for Windows Server 2022
  • Manage Systemd Services with Systemctl on Ubuntu
  • Set up Ubuntu’s Built-In Firewall
  • Set up ownCloud on Ubuntu
  • Set up SSH private/public Key Pair without using Password Authentication on Linux
  • Installing SAP Data Intelligence on Azure Kubernetes Service – Part 3
  • Installing SAP Data Intelligence on Azure Kubernetes Service – Part 2
  • Installing SAP Data Intelligence on Azure Kubernetes Service – Part 1
  • Prefer IPv4 over IPv6 in Windows Networks
  • Wireless 802.11 RADIUS Authentication over Site-to-Site IPSec VPN Tunnel failed
  • Set up a SFTP Chroot Jail on Ubuntu
  • Active Directory Certificate Mapping – Implicit vs. Explicit
  • Set up a RADIUS Server on Windows Server 2019 for 802.1X Wireless Connections
  • Using HTTP Strict Transport Security (HSTS) with Apache2
  • Numbering the IPv4 and IPv6 WAN Link between ISP and Customer
  • Apache HTTP Server and .htaccess
  • Set up Fail2ban on Ubuntu 20.04.3 LTS
  • Nikto Web Server Scanner
  • Set up ModSecurity (Libmodsecurity | ModSecurity v3 project) for Apache on Ubuntu
  • Set up MediaWiki on Ubuntu 20.04.3 LTS
  • Move Home Directory to another dedicated Drive/Partition in Linux
  • Change Owner for Azure AD joined Windows 10 Devices
  • Non Converged vs. Converged vs. Hyperconverged Infrastructure
  • Set up a lean Branch Office Network without any Servers and DCs inside by using an IPSec S2S VPN Tunnel connected with the Headquarters Network
  • Microsoft 365 Groups vs. Microsoft Teams Team
  • Microsoft Bookings
  • Azure AD Connect Sync Architecture – Simplified
  • Azure Hybrid Cloud – Enable Azure AD Password Writeback and self-service Password Reset
  • Set up Windows Autopilot – Production Environment from external – Part 2
  • Set up Windows Autopilot – Part 1
  • Configure Hybrid Azure AD join for managed domains
  • Install Windows Subsystem for Linux (WSL)
  • Primary Refresh Token (PRT) in Azure and Microsoft 365
  • Providing SSO in Azure AD and Microsoft 365
  • List of Authentication Protocols
  • Set up Apache Superset on Ubuntu using Docker Compose
  • Redirect from HTTP to HTTPS using the IIS URL Rewrite module
  • Move-CsUser : HostedMigration fault: Error=(201), Description=(Cannot find user in Active Directory with the following SIP URI
  • Set up an internal LAN and Perimeter Network with public IPv6 Addresses and pfSense
  • Microsoft Teams Meeting – Start recording is greyed out
  • pfSense – webConfigurator default Certificate expiring
  • Set up a Perimeter Network with public IPv4 Addresses and pfSense
  • Call Forwarding Teams Direct Routing with AudioCodes Mediant VE SBC and DTAG SIP Trunk – from external to external – no audio
  • Office 365 / Exchange Online Block Sender Domain
  • pfSense | Site-to-Site IPSec VPN | Subnets on each Site are identical
  • Troubleshoot AudioCodes Configuration Wizard wrong settings for DTAG and Teams
  • Migration from onPremise to Office 365 – Step by Step – Part 6 – Route your onPrem SIP Trunk to Skype for Business and Teams (Hybrid Voice Connectivity | Direct Routing)
  • SQL Server Integration Services (SSIS) Basics – Script Task
  • SQL Server Integration Services (SSIS) Basics – Load Data from a MySQL Database into SQL Server
  • Manage Azure and Microsoft 365 services with PowerShell and CLI
  • Migration from onPremise to Office 365 – Step by Step – Part 5 – Skype for Business onPrem to Skype for Business Online and Teams
  • External Identities in Azure Active Directory
  • Set up pfSense as a Forward Proxy with Squid and configure access for Linux and Windows Clients
  • IPSec policy-based S2S VPN Tunnel between pfSense and an Azure VNet
  • Set up an Azure SQL Managed Instance and connect over a S2S IPSec VPN from onPrem network
  • Configuring a Syslog Server on pfSense with the syslog-ng Package
  • Deploy WordPress in Azure App Service (Web App) with staging slots for the production and development environment
  • Configure Windows Service Accounts and Permissions exemplary on SQL Server 2019
  • Local user accounts in Windows
  • Set up Group Managed Service Accounts (gMSA) vs. Standalone Managed Service Accounts (sMSA)
  • Move Azure AD Connect to another Server
  • Install Skype for Business Server 2019 Step by Step
  • SSO Single-Sign-On to your onPremise RDS Remote Desktop Services 2016/2019 Environment
  • Troubleshooting Skype for Business external sign-in issues and examine the client sign-in process
  • Set up OpenVPN (pfSense) Point-to-Site (P2S) with RADIUS/Active Directory Authentification
  • IPSec dynamic route-based S2S VPN Tunnel between pfSense and an Azure VNet
  • Skype for Business Call Forwarding and Unified Messaging with Exchange 2013 | Step by Step
  • Skype for Business Conferencing | Step by Step
  • Configure Skype for Business Enterprise Voice with a SIP-Trunk (DeutschlandLAN SIP Trunk) and the Office Master Gate from Ferrari electronic AG | Step by Step
  • SFTP / SSH Server unter Windows einrichten mit Cygwin | Step by Step
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  • Set up a Central Log Server with Rsyslog on Ubuntu
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  • HCW8064 – HCW has completed, but was not able to perform the OAuth error when running Hybrid Configuration
  • Set up AudioCodes Virtual Edition (VE) SBC in Azure for Microsoft Teams Direct Routing with DTAG’s SIP Trunk
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• Category: Microsoft Azure
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