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Common BitLocker errors

Par : Surender Kumar

In my previous post, I explained how to enable BitLocker with PowerShell and how to unlock, suspend, resume, and disable BitLocker with PowerShell. You might face various errors while using BitLocker drive encryption. Since most errors are fixed using Group Policy settings, it is worth mentioning that all the BitLocker-related settings are available under the following Group Policy path:

The post Common BitLocker errors first appeared on 4sysops.
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Unlock, suspend, resume, and disable BitLocker with PowerShell

Par : Surender Kumar

In my last post, I outlined how you can enable BitLocker with PowerShell and manage key protectors. Today, I will cover BitLocker management with PowerShell. In particular, I will describe how you can unlock, suspend, resume, and disable BitLocker with PowerShell.

The post Unlock, suspend, resume, and disable BitLocker with PowerShell first appeared on 4sysops.
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Enable BitLocker with PowerShell

Par : Surender Kumar

BitLocker is a volume encryption technology that was first introduced in Windows Vista and Windows Server 2008. Like other Microsoft products, it also suffers from certain glitches, but many people around the globe rely on BitLocker Drive Encryption (BDE) to protect their data at rest.

The post Enable BitLocker with PowerShell first appeared on 4sysops.
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Directory Services Restore Mode: DSRM password reset, recover Active Directory

Par : Surender Kumar

Have you ever received the following error message when you tried to sign in on a domain controller? We can't sign you in with this credential because your domain isn't available. Scary, huh? With the help of Active Directory's Directory Services Restore Mode (DSRM), you can recover Active Directory by booting up in safe mode to restore a working configuration of your Active Directory. I hope you still know your DSRM password. If not, I show you how to reset the DSRSM password in this article.

The post Directory Services Restore Mode: DSRM password reset, recover Active Directory first appeared on 4sysops.
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Join Server Core to an Active Directory (AD) domain

Par : Surender Kumar

When you install Windows Server Core in your environment, there is no GUI or desktop experience to manage it. Admins who switch to Server Core from the desktop experience often face a slight learning curve. In this article, I will show you how to join a Server Core machine to an Active Directory (AD) domain with SConfig, PowerShell, or the command prompt.

The post Join Server Core to an Active Directory (AD) domain first appeared on 4sysops.
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Enable two-factor authentication for SSH in Linux

Par : Surender Kumar

In this article, you will learn how to enable two-factor authentication for SSH in Linux. Secure Shell (or SSH) is primarily used by admins to securely access and manage remote computers, particularly those running Linux. It supports two very common forms of authentication: password authentication and public key authentication. It is always recommended to use public key authentication for SSH access since it is more secure. However, if you still depend on password authentication, it is highly recommended to enable two-factor authentication.

The post Enable two-factor authentication for SSH in Linux first appeared on 4sysops.
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Increase the Outlook attachment size limit

Par : Surender Kumar

Did you ever try to attach a file larger than 20 MB in Outlook? If so, you probably received this error message: The file you're attaching is bigger than the server allows. Try putting the file in a shared location and sending a link instead. In this post, you will learn how tot increase the Outlook attachment size limit.

The post Increase the Outlook attachment size limit first appeared on 4sysops.
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Fix Settings app crashes in Windows 10 and Windows 11

Par : Surender Kumar

In this post, you will learn how to fix Settings app crashes in Windows 10 and 11. You can also use this guide if the Settings app won't even open.

The post Fix Settings app crashes in Windows 10 and Windows 11 first appeared on 4sysops.
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How to change Remote Desktop port (RDP port) using PowerShell

Par : Surender Kumar

The Remote Desktop port (RDP port) 3389 in Windows is a popular target for hackers. Thus, it might make sense to change the RDP port. This article describes how to change Remote Desktop with PowerShell.

The post How to change Remote Desktop port (RDP port) using PowerShell first appeared on 4sysops.
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Netsh winsock reset: If the internet is not working

Par : Surender Kumar

If the internet is not working on a Windows PC where everything related to networking is properly configured, the command netsh winsock reset might save your day. Furthermore, this command will also help you fix the Windows Sockets registry entries required for network connectivity are missing error that is shown when you run Windows network diagnostics.

The post Netsh winsock reset: If the internet is not working first appeared on 4sysops.
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Convert VCF to CSV without third-party service

Par : Surender Kumar

vCard, also known as VCF (Virtual Contact File), is a common format for digital business cards supported by many email clients. In this article, I will explain how you can easily convert a VCF to CSV format (or vice versa) without using any third-party service and then show how you can import the contacts to Outlook.

The post Convert VCF to CSV without third-party service first appeared on 4sysops.
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Configure DMARC for SPF and DKIM

Par : Surender Kumar

Domain-based Message Authentication Reporting and Conformance (DMARC) is a validation system that ties both SPF and DKIM together to further strengthen the email authentication system in your domain. In addition, DMARC supports reporting, an important feature that SPF and DKIM lack.

The post Configure DMARC for SPF and DKIM first appeared on 4sysops.
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DKIM vs. SPF

Par : Surender Kumar

In my last post, I explained how to configure DKIM. Today, I will cover the difference between DKIM and SPF. You might be wondering why you need DKIM if you already have SPF implemented, considering that post methods are used to authenticate the sender of an email. Make sure you read my previous posts on DKIM and SPF first.

The post DKIM vs. SPF first appeared on 4sysops.
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How to configure DKIM

Par : Surender Kumar

In my previous post, you learned about the sender policy framework (SPF) and its importance in your domain. In today's post, I will explain how to configure DKIM.

The post How to configure DKIM first appeared on 4sysops.
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How to create an SPF Record: Prevent email spoofing

Par : Surender Kumar

The Sender Policy Framework (SPF) is a technique that prevents email spoofing. In this article, you will learn the importance of the SPF record and how to correctly configure it in your domain's DNS so that emails sent from your domain are not marked as spam by the recipient.

The post How to create an SPF Record: Prevent email spoofing first appeared on 4sysops.
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IIS shared configuration

Par : Surender Kumar

Since version 7, Internet Information Services (IIS) has offered a built-in feature known as IIS Shared Configuration, which uses the idea of storing the applicationHost.config, administration.config, and configEncKey.key (encryption key) files used by IIS in a network share. You can then configure multiple web servers to utilize these configuration files, and any change to the IIS configuration seamlessly propagates to other servers without any additional tool or administrative effort. 

The post IIS shared configuration first appeared on 4sysops.
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Troubleshoot HTTP Error 403.14 – Forbidden in IIS

Par : Surender Kumar

In a previous post, you learned how to troubleshoot 401 – Unauthorized: Access is denied due to invalid credentials. In this post, we will cover how to troubleshoot HTTP Error 403.14 – Forbidden in Internet Information Services (IIS).

The post Troubleshoot HTTP Error 403.14 – Forbidden in IIS first appeared on 4sysops.
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How to fix HTTP Error 503 – The service is unavailable

Par : Surender Kumar

In a previous post, you learned how to troubleshoot HTTP Error 500 – Internal server error. In this post, we will look into how to fix HTTP Error 503 – The service is unavailable.

The post How to fix HTTP Error 503 – The service is unavailable first appeared on 4sysops.
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Debugging an IIS 500 – Internal server error

Par : Surender Kumar

If your Internet Information Services (IIS) produces a 500 – Internal server error, your website is in serious trouble. Debugging an IIS 500 – Internal server error can take some time, so you'd better be prepared for the worst-case scenario. You don't want to research how to deal with this error under time pressure.

The post Debugging an IIS 500 – Internal server error first appeared on 4sysops.
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