Alternatives to Outpost Firewall Pro for all platforms with any license

GlassWire

Visualize network activity in detail, get notified when new apps access the network, look out for malware, and block bad apps.

Freemium $ $ $ Windows Android Android Tablet
Built-in Firewall Graphical component Network Monitoring Push subscriptions Add a feature

112 Like
COMODO Internet Security

Comodo Internet Security is a free, very voluminous and multi-layered security application that keeps hackers out and personal information in. If you prefer a smaller...

Freemium $ $ $ Windows
Customizable Real-time protection Run file in a Sandbox Add a feature

231 Like
Comodo Free Firewall

Secure your system against internal attacks such as Trojan viruses / malicious software and external attacks by hackers. Safeguard your personal data through a simple...

Free Windows
No features added Add a feature

141 Like
Little Snitch

Little Snitch is a firewall application that monitors and controls outbound internet traffic.

Commercial $ $ $ Mac
No features added Add a feature

103 Like
Privatefirewall

This personal firewall and intrusion detection application provides comprehensive online security. It constantly monitors your PC for intrusion and reports any findings...

Free Windows
Network Monitoring Add a feature

23 Like
ZoneAlarm Free 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
No features added Add a feature

37 Like
Windows 10 Firewall Control

Protects your applications from undesirable network incoming and outgoing activity, controls applications internet access. Allows you to control personal information...

Freemium Windows
Portable Add a feature

30 Like
Windows Firewall Notifier

Windows Firewall Notifier (WFN) extends the default Windows embedded firewall behavior, allowing to visualize and handle incoming or outgoing connections.

Free Open Source Windows
No installation Outbound firewall Add a feature

15 Like
Netcut Defender

Arcai.com’s NetCut-Defender, –The only one tool can 100% guaranteed success protect you and your user away from arcai.com’s netcut cut (or alike) ARP SPOOFing.

Free Windows
No features added Add a feature

5 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...

Free Windows
No features added Add a feature

3 Like
- Discontinued The last update was released on July 29th, 2005.
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...

Free Windows
No features added Add a feature

15 Like
- Discontinued Last version, 6.0.0.74, was released on September 29, 2009. It can be still downloaded from Download.com.
CacheGuard-OS

CacheGuard OS is an Appliance oriented Operating System dedicated to Web traffic Security and Optimization.

Free Open Source Windows VirtualBox VMware vSphere Hypervisor Microsoft Hyper-V Server Proxmox Virtual Environment
No features added Add a feature

3 Like
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...

Free Windows
No features added Add a feature

1 Like
- Discontinued Website now longer exists to provide download. Program is still available on other sites.
Murus Firewall

Murus is a frontend for the OS X PF network firewall. From basic filtering to advanced proactive options, Murus allows to easily configure a complex network setup...

Freemium Mac
IP Address Blacklist Add a feature

5 Like
FortKnox Firewall

FortKnox Firewall is personal firewall solution that allows you to protect a PC against hacker attacks, trojans, spyware and internet threats. It has built-in Intrusion...

Commercial Windows
No features added Add a feature

2 Like