Alternatives to Guarddog

Comodo Free Firewall

Comodo Free Firewall is a free security application designed to protect your computer from online threats. It provides real-time protection against viruses, worms, Trojans, and other malicious threats. It monitors all incoming and outgoing network traffic and alerts users if any ...

TinyWall

TinyWall is a lightweight, easy to use firewall application for Windows that helps protect your computer from malicious traffic and unwanted applications. It also prevents applications from modifying critical system settings and creating hidden network connections. TinyWall runs ...

Gufw

Gufw is a free and open source graphical user interface for managing a Linux iptables firewall. It's designed to be easy to use and provides a user-friendly graphical interface for controlling and configuring firewall settings. It allows users to control incoming and outgoing con...

ZoneAlarm Free Firewall

ZoneAlarm Free Firewall is a comprehensive home and family security solution designed to protect users from online threats such as hackers, viruses, and other malicious software. It provides comprehensive security for all computers, laptops, and mobile devices that are connected ...

OpenSnitch

OpenSnitch is a free, open-source, and cross-platform application designed to help users protect their privacy and security on their devices. It uses a combination of port-based network filtering and application-level monitoring to protect users from malicious activities. OpenSni...

Firestarter

Firestarter is a powerful security and privacy application that helps protect your personal information from unauthorized access. It offers a variety of features designed to keep your data safe and secure, including data encryption, secure browsing, VPN connections, and a built-i...

Discontinued active development was stopped in 2005.

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PC Tools Firewall Plus

PC Tools Firewall Plus is a personal firewall application that provides users with powerful protection against unauthorized access, malicious attacks, and data theft. It has advanced features such as full network control, program control, port control, and much more. Firewall Plu...

The last discontinued version, 6.0.0.74, was released on September 29, 2009. It can still be downloaded from Download.com.

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Filseclab Personal Firewall

Filseclab Personal Firewall is a comprehensive, easy-to-use, and highly effective security application designed to protect your computer from malicious attacks, viruses, worms, and other online threats. It provides a powerful two-way firewall that monitors both incoming and outgo...

Discontinued The last update was published on July 29, 2005.

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Nufw

Nufw is an open-source application that helps organizations protect their networks and protect their users’ privacy. It is an extensible and customizable network firewall and user authentication system that provides a secure environment for users on the network. It allows adminis...

Wallix Pro Firewall

Wallix Pro Firewall is an advanced and comprehensive software solution designed to provide users with complete control over their network security. It is an all-in-one security solution that offers users the ability to protect their networks from both external and internal threat...

The discontinued web site no longer exists to provide downloads. The program is still available on other sites.

Guest

Core Force

Core Force is a comprehensive security and privacy application that helps protect users against identity theft, phishing, malicious software, and other online threats. It provides a variety of features, such as two-factor authentication, password protection, data encryption, and ...

Discontinued Last modified: 10/25/05. See https://www.coresecurity.com/grid/index-open-source-tools

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DefenseWall

DefenseWall is a security program designed to protect users from malicious and potentially dangerous websites, applications, and downloads. It uses real-time protection and heuristic scanning to detect and block malicious code, as well as secure your system from malicious website...

Sygate Personal Firewall

Sygate Personal Firewall is a comprehensive and powerful security and privacy application designed to protect your computer from unauthorized access, malicious attacks and data theft. It provides an advanced level of protection from malicious and unauthorized users, as well as fr...

Suspended on October 10, 2005, Symantec Corporation acquired Sygate Technologies, so Sygate Personal Firewall has been replaced by an advanced "Smart Firewall", available from Symantec's Norton Internet Security. Sygate Personal Firewall can still be downloaded from Tucows.

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FortKnox Firewall

FortKnox Firewall is an advanced security and privacy application designed to protect your computer and personal information from malicious threats and hackers. It is a powerful, feature-rich firewall that blocks incoming connections and data traffic from unknown sources and mali...

Armor2net personal firewall

Armor2net personal firewall is a comprehensive security application designed to protect your computer from malicious attacks. It helps to protect your system against external threats, such as unauthorized access, viruses and other malicious software, as well as internal threats, ...

Discontinued It appears that the official site is no longer available, but the software is still available through download sites.

Guest

SoftPerfect Personal Firewall

SoftPerfect Personal Firewall is a comprehensive security solution designed to protect your computer from external and internal threats. It provides a powerful and user-friendly interface that allows you to easily configure the firewall to protect your PC from malicious inbound a...

Discontinued The program is no longer available on the official website. The latest version, 1.4.1, released on August 1, 2008, can still be downloaded from Softpedia.

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InJoy Firewall

InJoy Firewall is an advanced security and privacy application developed by InJoy, Inc. It provides users with an effective way to protect their personal information and data from unauthorized access. The application has a wide array of features such as a user-friendly interface,...

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