11 Best FREE Firewall Software for Windows [2021 Update]

Details: Last Updated: 20 April 2021

Firewalls are software programs which are used to improve the security of computers. It protects a private network or LAN from unauthorized access. The purpose of having a firewall installed on your computer, phone, or tablet is to protect against malware threats that exist on the internet or other connected networks.

Following is a handpicked list of Top Free Firewall Software, with their popular features and website links. The list contains both open source(free) and commercial(paid) software.

Best Firewall Software for Windows (Open Source & Paid)

Name	Free Trial	Features	Link
GlassWire Firewall	✅	• You can see your current & past network activity • Detect malware and block badly behaving apps • You can easily get alert when a new app accesses the network	Learn More
Firewall Security Management	✅	• You can create custom firewall security system filters • Easily Automate your firewall security audits and reports • Monitor your firewall protection configuration changes	Learn More
ManageEngine Firewall Analyzer	✅	• Easily get notified about changes made on firewall configuration • User internet activity monitor • Network traffic and bandwidth monitoring	Learn More
ZoneAlarm	✅	• Zonealarm give protection against inbound and outbound cyber attacks • Zonealarm Block unwanted traffic • WiFi PC Protection	Learn More

1) GlassWire Firewall

GlassWire is a free network monitor and security tool using a built-in firewall. This firewall software can see your past and present network activity.

Features:

Offers add-on Internet security to your computer or server by visualizing all past and present networking data
Allows you to block the program in one click
It helps you to keep track of your daily, weekly, or monthly bandwidth usage.
This software provides multiple remote server monitoring

2) Firewall Security Management

Firewall Security Management is a tool that helps you to strengthen your network security. You can use this tool to obtain real-time visibility into any network having a firewall.

Features:

It allows you to create custom security filters.
This tool enables you to monitor network traffic, firewalls, devices, and applications.
You can optimize firewall configuration to avoid security breaches.
It provides reports with a built-in policy check.

3) ManageEngine Firewall Analyzer

ManageEngine Firewall Analyzer is a firewall management software. It helps you to detect security vulnerabilities in the firewall policies. It provides real-time visibility into network firewall security.

Features:

Manages firewall policy effectively
Ensures that the policy changes are managed
Monitors the VPN and internet activities of users
Continuously monitors and generates various compliance standards reports

4) ZoneAlarm

ZoneAlarm is a free firewall that helps you to protect your computer against cyber attracts. It blocks unwanted programs and network traffic access to the internet.

Features:

You can work invisibly.
It guards your personal data.
Provides a secure browsing experience.
Offers WiFi protection.
It allows you to search safely and give you alerts for dangerous sites.
You can safely download documents from the internet.

5) Comodo Free Firewall

Comodo is one of the best free firewall software that provides the technology solutions that secure and preserve that experience. The tool offers a fast and hassle-free online experience for users.

Features:

Offers fast and hassle-free online experience
Manages traffic on your PC
Helps you to block all types of internet attacks
DDP-based security keeps you informed and make your PCs safe
Secures all connections when you are online
Monitors in/out connections

Link: https://www.comodo.com/home/internet-security/firewall.php

6) AVS Firewall

AVS Firewall is used to protect your computer against hacker attacks. This firewall protection software helps you to secure your PC against malware, filter applications to prevent unauthorized intrusions.

Features:

Protect your PC registry every time any suspicious attempt to change the registry contents takes place.
Switch on the anti-banner feature and block unwanted flash advertisings, banners, and popups.
Offers feature of parent control making a whitelist of URLs and websites that you wants to view and work with
Allows you to create your own personalize firewall rules for each program and application
It will also enable you to view and control the traffic volume.
View alerts when any application tries to connect to the net from your PC.

7) Avast Endpoint Firewall

Avast Endpoint is a firewall protection tool that helps you to find out vulnerabilities in third-party applications. It also makes it easy to deploy patches from the Avast Business to your system.

Features:

Helps you to manage PCs, Macs, and servers from a single place
Schedule tasks in advance to make all devices control at all times
Prevent dangerous websites, set templates, and group devices
Most comprehensive reports of threats and malware
Invite other administrators and set personalized notifications

8) Mcafee Firewall

Macfree firewalls allow your PC and other devices and closely watch network traffic. It also allows you to capture malicious programs before they reach your computer.

Features:

Prevent various type of viruses, malware, and ransomware from infecting your computer and mobile devices
Helps you to secure our firewall and block hackers from accessing your home network
Helps you to store and manage all your online passwords in a single location
Keep sensitive files private by storing them on your system with 256-bit encryption

9) Azure Firewall

Azure Firewall provides network security to protect your network resources. It also offers a feature of threat intelligence-based filtering. It also allows preventing traffic from malicious domains and IP addresses.

Features:

Provides high availability and unrestricted cloud scalability
You can create, enforce and log application and network connectivity policies
Allows source and destination Network Address Translation
Support for hybrid connectivity through deployment behind ExpressRoute Gateways and VPN
Offers integrated with Azure Monitor for logging and analytics

10) Evorim

Evoriam is one of the best free firewall software that identifies threats and protects the privacy of your website. It is one of the best firewall for Windows 10 that controls every program on your computer by permit or denies access to the Internet.

Features:

Prevent your site invaders from gaining access to your computer
Regulate the access to the network and Internet according to a specific application
If a non-authorize program wants to access the internet, you will receive a notification immediately
Protects against tracking and monitoring of internet users with the help of cookies and other techniques.

Link: https://www.evorim.com/en/free-firewall

11) Tinywall

TinyWall is an advanced firewall built into modern Windows systems. The software also prevents malicious programs from modifying the settings of the Windows Firewall.

Features:

Multiple and easy ways to whitelist programs
Offers firewall tampering protection
Easily create exceptions with the auto-learn feature.
Password lockdown of settings
Support for temporary and timed firewall
Hosts file protection
Offers an option to restrict an application to the LAN
Helps you to the recognition of safe software and frauds

Link: https://tinywall.pados.hu/

12) Norton

Norton AntiVirus Plus is ideal for 1 PC or Mac for offers real-time threat protection against malware, spyware, phishing attacks, and other online threats. The software is designed to provide multiple layers of security for your PC or Mac, including firewall protection.

Features:

Real-time threat protection
Helps you to generate, store, and manage your passwords, credit or debit card information and other credentials
Helps you to monitor communications between your computer and other computers

Link: https://in.norton.com/downloads

13) Untangle

Untangle NG Firewall simplifies network security with a single, modular, software platform designed according to the need of your organization.

Features:

Simplified management of your dispersed networks from a single pane of glass
It is one of the best free firewall for Windows that allows you to manger your backups, auditing logs, licensing and renewals
Integration with endpoint security partners

Link: https://www.untangle.com/get-untangle/

FAQs

❓ What is a Firewall?

A Firewall is a security system designed for the network. A firewall is set on the boundaries of any system or network which monitors and controls network traffic. Firewalls are mostly used to protect the system or network from malware, worms, and viruses. Firewalls can also prevent content filtering and remote access.

❗ Why Use Firewall Software?

Firewall software provides protection from cyberattacks and secures your computer and network from unnecessary network traffic and malicious software. It also improves the security of your computer and protects your private network from malware threats and unauthorized access.

👉 How does a Firewall work?

A firewall monitors all the traffic and data that goes in and out of a system. It allows good data and blocks bad data from entering the computer. It uses the following three methods to control the network traffic:

Packet Filtering: which uses pre-determined security rules to create filters and discard the packets which are flagged by the filters.
Proxy Service: which is an application that acts as an intermediary between systems. It creates and runs a process on the firewall that mirrors a service as it runs on the end host.
Stateful Inspection: which is a modern method of firewall scanning. It holds significant attributes of each connection in a database of trusted information. Then it compares the information being transferred to the copy relevant to that transfer held in the database; if the comparison has a positive outcome, the information is allowed; otherwise, it is denied.