Cost / License
- Free
- Open Source
Platforms
- Linux
- Go (Programming Language)

Douane is described as 'Personal firewall that protects a user's privacy by allowing a user to control which applications can connect to the internet from their GNU/Linux computer' and is a Firewall in the security & privacy category. There are more than 25 alternatives to Douane for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Douane alternative is Portmaster, which is both free and Open Source. Other great apps like Douane are simplewall, Fort Firewall, NetLimiter and TinyWall.

As soon as you’re connected to the Internet, your apps can send whatever they want to wherever they want, unnoticed by you, because all of this happens invisibly under the hood.




Netfilter software comprises iptables, ipset, conntrack-tools, libnetfilter and more. It is the core of Linux firewalls and NAT. It consists of a set of hooks inside the Linux kernel and a number of utilities to manage callback functions.
Perfects the Windows Firewall offering additional security. Get the most out of your Windows firewall, create new security rules for your online applications, alerts you to anomalies with real-time protection.




Karma Firewall app lets you take control back of your phone and block internet traffic to and from specific apps. This is a simple yet powerful firewall with an easy to use intuitive GUI which allows you to protect your sensitive data.

Provides two-way firewall protection by blocking unauthorized network access, detecting intrusions, hiding devices from threats, stopping viruses, spyware, and data theft, offering real-time alerts, customizable rules, and simple setup with light system impact.



ZoneAlarm Firewall is the most popular iPhone alternative to Douane.
Firewalld provides a dynamically managed firewall with support for network/firewall zones that define the trust level of network connections or interfaces. It has support for IPv4, IPv6 firewall settings, ethernet bridges and IP sets.

Bouncer is an application to help you choose the correct firewall zone for wireless connections. When you connect to a new network, Bouncer will open a window prompting you for what kind of network (eg home, public, work) it is.

SpyShelter is an effective and easy-to-use security application that helps you to protect your system against known and unknown malware.



SterJo NetStalker is innovative and FREE security software able to detect all authorized and unauthorized connections to your computer and send you alert for each new connection.

All the functionalities of a modern Next-Gen firewall in few clicks: MultiWAN, Deep Packet Inspection, VPNs, Threat Protection.




