Alternatives to Guarddog for all platforms with any license

TinyWall

TinyWall is a free software to harden and control the advanced firewall built into Windows Vista, Windows 7 and Windows 8. TinyWall includes a combination of features...

Free Windows
Selective temporary blocking Add a feature

48 Like
Gufw

Gufw is an easy, intuitive way to manage your Linux firewall. It supports common tasks such as allowing or blocking pre-configured, common p2p, or individual ports...

Free Open Source Linux
Peer-To-Peer Add a feature

46 Like
OpenSnitch

OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.
- Discontinued
  The software isn't being developed anymore as you can read here: https://github.com/evilsocket/opensnitch/issues/259
Free Open Source Linux
Application Firewall Network Monitoring Add a feature

13 Like
ZoneAlarm Firewall

ZoneAlarm Free Firewall blocks hackers from infiltrating your home PC by hiding your computer from unsolicited network traffic. By detecting and preventing intrusions...

Freemium Windows
Parental Control Add a feature

38 Like
Firestarter

Firestarter is an Open Source visual firewall program. The software aims to combine ease of use with powerful features, therefore serving both Linux desktop users and...
- Discontinued
  Active development stopped in 2005.
Free Open Source Linux
No features added Add a feature

10 Like
PC Tools Firewall Plus

PC Tools Firewall Plus is a powerful free personal firewall for Windows® that protects your computer by preventing unauthorized users from gaining access to your...
- Discontinued
  Last version, 6.0.0.74, was released on September 29, 2009. It can be still downloaded from Download.com.
Free Windows
No features added Add a feature

15 Like
Filseclab Personal Firewall

Filseclab Personal Firewall Professional Edition is one of the most important software of Filseclab, it is very easy to use and also very powerful. It can provide more...
- Discontinued
  The last update was released on July 29th, 2005.
Free Windows
No features added Add a feature

3 Like
Core Force

CORE FORCE is a free comprehensive endpoint security solution for Windows 2000 and Windows XP systems. CORE FORCE provides inbound and outbound stateful packet...
- Discontinued
  Last modification date: 10/25/05. See https://www.coresecurity.com/grid/index-open-source-tools
Free Open Source Windows
No features added Add a feature

1 Like
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Wallix Pro Firewall

Wallix Pro Firewall prevents intruders from accessing your computer and that’s the main objective for a computer firewall. It automatically detects and blocks attacks...
- Discontinued
  Website now longer exists to provide download. Program is still available on other sites.
Free Windows
No features added Add a feature

1 Like
Sygate Personal Firewall

Sygate Personal Firewall is a bit old but good firewall for Windows. It uses very small amount of system resources and is quite robust. The project is now...
- Discontinued
  On October 10, 2005 Symantec Corporation acquired Sygate Technologies, so Sygate Personal Firewall has been replaced by an advanced "Smart Firewall," available in Symantec’s Norton Internet Security. Sygate Personal Firewall can still be downloaded from Tucows.
Free Windows
No features added Add a feature

5 Like