5 Ways to Secure Windows Server: Maximum Dedicated Server Protection

1. Windows Network Protection

The very first layer of protection for any dedicated Windows server is network protection. This is where most vulnerability gaps appear. We mean poor firewall configuration, unnecessarily open ports, and IP access vulnerability gaps across your network infrastructure.

It’s vital for a Windows dedicated server to control precicely all entry points via a well-protected layer that reduces your attack surface and immediately blocks unauthorized attempts before they hit the OS.

1.1 Firewall Configuration

To safeguard Windows servers from unauthorized access and malicious traffic, it is essential to enable and configure the Windows Firewall, which can significantly reduce the attack surface by limiting traffic to necessary pathways. So, when configuring the Windows Firewall, it is crucial to define inbound and outbound rules separately, ensuring that only the necessary ports are open to minimize exposure.

Set Up Local Firewall Rules:

1. Open the Control Panel → System and Security → Windows Defender Firewall.
2. Click on Advanced Settings → Inbound Rules → New Rule → Port or Program.
3. Now specify only the allowed ports (leave common ports like 3389 * 80 open).
4. Then apply the firewall rule to the Domain, Private, and Public profiles to save.
5. Go to Outbound Rules and create open only the ports that your server requires.

While you’re at it, you can also create rules for controlling the remote access and RDP access to your server, especially if third-party programs are involved. In addition, you can also restrict IP addresses through the Windows Firewall to further strengthen your protection.

Note: Beyond the local firewall rules, clients with exceptionally sensitive data must concider hardware firewall and an account lockout policy to further strengthen their protection.

1.2 IP and Access Restrictions

IP address whitelisting is a recommended practice for firewall rules, allowing only specific IP addresses to access open ports, which helps to mitigate brute-force attacks and unauthorized access attempts. This is one of the most frequently exposed areas by attackers, who scan your exposed services and target the weakest entry points, such as RDP access, especially on terminal servers.

Here’s how to restrict RDP access by IP addresses:

1. Go to the Advanced Settings of Windows Defender Firewall.
2. Choose Inbound Rules and locate “Remote Desktop (TCP-In)“.
3. Go to Properties, then Scope, and select “These IP Addresses“.
4. You can now add only trusted IP addresses to connect over RDP.

To secure Remote Desktop Protocol (RDP), it is recommended to change the default port from 3389 to a custom port and restrict access to specific IP addresses to minimize exposure to attacks. If you want to tighten this even further, you can limit and select only specific users who can access permissions.

You can even remove user account entries from the remote desktop and keep only local accounts or domain users in control. Also, to ensure data confidentiality and integrity across the network, you can implement IPsec for encrypting network traffic between servers.

Quick Tip: Implementing multifactor authentication (MFA) for RDP access adds an additional layer of security, making it harder for unauthorized users to gain access even if they have the correct password.

2. Access & User Account Control

Another targeted area of your Windows security layer is the administrator’s account, especially on systems like domain controllers that manage authentication across the network. Attackers target sensitive data through anything from poorly secured user accounts to weak permissions control. With even a single compromised login, all local accounts and the operating system can be targeted at once.

Let’s go through the steps and establish the admin and guest account status:

2.1 Administrator Account Control

The local administrator account is one of the most vulnerable points after Windows server installation. It is one of the first places in server hardening, since, unlike the default user accounts, admin accounts have the capability to control every aspect of a web server.

To enhance security, it is recommended to rename the default Administrator account in Windows Server to make it less recognizable and to create a new administrative account with a strong password policy.

Here’s how to limit a local account:

1. Open the Control Panel and navigate to Administrative Tools.
2. Choose Computer Management and go to Users and Groups.
3. Next, select Users and right-click the Administrator Account.
4. Select “Rename” and then type in a non-obvious admin name.

Another recommendation is to use the administrator account only for administrative tasks. Service accounts should be created for applications and services, rather than using user accounts, to prevent service disruptions if user passwords change or accounts are deleted.

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2.2 User Accounts & Permissions

When it comes to user accounts and permissions, control must be tight. You need to limit the access, assign roles carefully, and review permissions often.

All your user accounts should be created with strong passwords that are at least 16 characters long, incorporating uppercase and lowercase letters, numbers, and special characters to mitigate the risk of unauthorized access. Also, regularly auditing user accounts and permissions is essential to ensure that only authorized users have access to critical resources, thereby enhancing overall security.

Here are a few steps you should undertake:

• Review your Windows server user accounts
• Disable unused user accounts on the server
• Create groups with strict permission access
• Add all the users to these groups accordingly

In addition, you can enable notifications about changes from other users. You can control when to get notified, in case changes are made on your Windows server.

Limiting access especially important when you intend to perform remote administration. So, make sure remote access is configured correctly and pre-define exactly what the local account uses.

Note: It is a best practice to disable unused user accounts and the local guest account to reduce potential attack vectors on Windows Servers.

2.3 Enforce Strong Authentication

Strong authentication is the final layer of protection when it comes to user accounts, administration, and access. Attackers target accounts with simple credentials, blank passwords, or weak policies tied to the LAN manager authentication level. Without strict controls, a single compromised user account can lead to full system access.

Here’s a step-by-step guide to establishing strong authentication:

1. Go to the Local Security Policy → Account Policies → Password Policy.
2. Choose a strong password with a minimum of 14+ characters within it.
3. Enable complexity requirements to further strengthen all your passwords.
4. Then, navigate back to the Security Options from the previous section.
5. Set LAN manager authentication level to send NTLMv2 responses only.
6. Finally, restrict the console logon access to trusted administrators only.

This way, you eliminate brute force attacks.

See Also: How to Migrate A Windows Server

3. Secure Data, Backups, and Encryption

The prime target for malicious attacks is your file system. Beyond intentional attacks, there is always the possibility of data loss or corruption, which is a guaranteed way to disrupt your server operations. To combat this effectively, you need to first encrypt your data, then establish strict control over access, and finally design local/cloud backups and a disaster recovery plan.

3.1 Encrypt Data and Drives

To enhance server security, it’s advisable to enable and configure BitLocker drive encryption for the entire system drive, as well as any additional drives containing data.

Here’s a step-by-step guide to enable, configure, and deploy BitLocker drive:

1. Open the Control Panel and go to System and Security.
2. Choose BitLocker Drive Encryption and locate the drive.
3. Click on “Turn on BitLocker” and choose how to unlock.
4. Then, save the recovery key to a secure external location.
5. Avoid storing the recovery key on the same server instance.
6. Select “full drive encryption” to maximize your protection.

Also, when using web apps/services/remote connections, always use secure protocols such as TLS, HTTPS, and SSH to encrypt data in transit.

Note: For more fine-grained data protection, consider utilizing the Encrypting File System (EFS) to encrypt individual files on Windows Servers.

3.2 File Storage and Access

Another potential exposure gap is the file server, containing sensitive data, which can be exposed to unauthorized users. That’s why it’s essential to reduce your server’s exposure by implementing strict file and storage access across your Windows server file system.

First, you need to restrict access, control permissions, and monitor activity across all shared resources. Strong Windows server security depends on limiting who can view, modify, or transfer data in the OS.

Here’s how to secure file storage and access:

1. Open Computer Management and go to Shared Folders, then Shares.
2. Next, review all the active file sharing paths and remove unused shares.
3. Right-click a folder, then open Properties, then head to the Security tab.
4. Assign permissions to groups instead of individual user account entries.
5. Grant only required access and restricted write access to sensitive data.
6. Open the Sharing tab and configure the Advanced Sharing permissions.
7. The next step is to limit your access to specific authenticated users only.
8. Stop anonymous access in Local Security Policy under Security Options.
9. Also, disable unused terminal services to reduce unnecessary exposure.
10. Now, enable auditing and monitor activity in the security log and log files.

Note: Unused services, applications, and protocols should be removed or disabled to minimize potential entry points for attackers in Windows Server environments.

3.3 Backup & Recovery Plan

Even with strong security layers, access control, and all the prevention methods, a disaster can still be possible; you need a reliable backup and a strong recovery plan.

Follow the 3-2-1 Backup Rule: maintain 3 copies of data (the original and two backups), store them on 2 different media types, and keep 1 copy offsite to protect against physical threats. We strongly advise against keeping your backups on the Windows server. Always use external devices, or concider using cloud backups to store your most important backups.

Automate and schedule backups according to business needs, ensuring critical data is backed up more frequently than non-critical data.

Finally, create a Disaster Recovery Plan that outlines steps to quickly restore critical data and services in case of an attack, data loss, or physical damage to the server.

Disaster Recovery Plan Example:

A disaster recovery plan should include backup operators, with simple and straightforward steps:

#1 Data Corruption: In case of a data loss or corrupted data, you need to have immediate access to one of the external backups. The go-to here is having a cloud backup or external storage.

#2 Server Crash: In case of a server crash, you need to have a read-to-go Windows distribution that you can immediately reinstall and deploy everything from your external backup.

#3 Unauthorized Access: Quickly reset all credentials immediately using console logon or automatic administrative logon, and use Windows Server Update Services to eliminate them.

#4 Failed System Update: In case of a failed system update and “bricked” OS, you need to restore the system from your backup to an operational state and identify the problem.

#5 Hardware Failure: Contact your physical security team, replace damaged hardware, and restore anything lost from your backup to return your dedicated Windows server to operational state.

Important: Regularly test backup restoration processes to ensure that backups are valid and can be restored when needed.

4. Keep Your Windows Server Updated

After installing the Windows Server operating system, it is crucial to immediately update it with the latest patches to mitigate known vulnerabilities, which can be done through Microsoft or Windows Server Update Services (WSUS).

Keeping Windows up-to-date is one of the general security best practises, as outdated OS open many areas of vulnerability. From missing security patches to advanced security limitations, services like Microsoft SQL Server might be exposed to malicious attacks.

Here’s how to keep your Windows server up-to-date:

• Open Settings or the Control Panel and head to Windows Update.
• Click “Check for updates” and install all available security patches.
• Enable automatic updates to keep your Windows server protected.
• Configure Windows Server Update Services to manage all updates.
• Use System Center Configuration Manager for advanced updates.
• Schedule updates during maintenance windows to avoid downtime.
• Test updates in a test environment before deploying to production.
• Finally, restart the server instance after updates to apply changes.

You can also explore the Windows Task Scheduler to establish strict and automated Windows updates. Also, don’t forget that disabling legacy protocols like SMBv1 and TLS 1.0/1.1 is essential due to their known vulnerabilities.

Note: It is recommended to enable automatic notifications for patch availability and to test patches in a specific environment before deploying them to ensure compatibility and stability.

5. Windows Server Activity Monitoring

Visibility into what’s going on the Windows server is one of the most important aspects, and without it, you’re exposing your entire infrastructure to silent threats. Attacks often happen without triggering any of the obvious alerts, so monitoring everything is critical.

Tracking activity is key here. From network activity to log files monitoring and OS behavior, all of this can identify and mitigate all issues as they arise, before causing any significant service distruptions.

5.1 Windows Event Viewer

Through the Windows Event Viewer, you can get direct insights into what’s happening within a Windows server. It logs everything from authentication attempts to system changes and service activity. It could be used to monitor your system and provide valuable insights.

Track Login Attempts and Account Activity

1. Open the Event Viewer and go to Windows Logs.
2. Then, select Security and use the “Find” button.
3. Filter ID 4624 to check all the successful logins.
4. Filter ID 4625 to check the unsuccessful logins.

This provides you with immediate insights into all login events that took place. There are many filters you can use to narrow down your search to specific events.

Monitor Privilege Use and Admin Actions

1. In the Event Viewer’s Security logs, filter Event ID 4672.
2. Review actions performed by the administrator account.
3. Verify all the actions align with expected admin activity.

Detect Policy and Configuration Changes

1. Filter Event ID 4719 to track changes in security settings.
2. Monitor updates to group policy objects and permissions.
3. Identify any unauthorized modifications to system policies.
4. Investigate unexpected configuration changes immediately.

Review the System and Service Activity

• Go to Windows Logs, then choose the System section.
• Look for any service failures and/or unexpected restarts.
• Track issues affecting network service and OS stability.
• Identify errors linked to operating system performance.

Monitoring login attempts is useful to prevent intrusion and protect your server against brute force attacks, and dedicated intrusion prevention tools can help you view and review all log files and send alerts if suspicious activities are detected.

That’s how far the capabilities of the Windows Event Viewer stretch. Hence, to get your monitoring even further, you would need some specialized software.

5.2 Third-Party Software

Built-in tools cover basic monitoring, but they fall short when you need real-time alerts, correlation, and deeper visibility. Third-party solutions will help you track network traffic, analyze log files, and detect threats across your entire Windows server environment.

These tools improve server security by centralizing data, automating detection, and reducing response time. They are useful for preventing malicious attacks, identifying abnormal network connections, and strengthening overall network security.

So, enabling logging is essential for monitoring server activities, as it allows administrators to spot problems or breaches in a timely manner and reconstruct past events that led to issues.

Using centralized logging solutions, such as Security Information and Event Management (SIEM) systems, helps in detecting anomalies and ensuring real-time monitoring in many Windows Server environments. It’s a consideration for users who work in sensitive areas like finance or transactions.

Dedicated Windows Server at ServerMania

Securing your Windows server is possible with an infrastructure that supports network security, strict access control, reliable backup, and continuous monitoring.

Here at ServerMania, our Windows Dedicated Servers are designed to accommodate all the layers of protection with ease, while backed up by our AraCloud platform for backups. When these layers work together, you can reduce your attack surface significantly and keep your operations running safely.

The ServerMania Advantage:

• Highly customizable order panel for tailoring dedicated servers with custom CPU, RAM, Storage, Networking, and Software.
• Windows distributions, including Windows Server 2016, 2019, 2022, and 2025, offering Datacenter and Standard editions.
• Top-Tier Data Centers across North America, Canada, and Europe for fast connectivity and low latency for the clients
• 24/7 customer support answering questions and providing insights, backed by a Knowledge base to support every step.

See Also: How Much Does a Windows Server Cost

💬 If you’re curious to explore our services, book a free consultation to discuss your Windows server with an expert. We’re available right now.