Simplewall is an excellent, open source, and straightforward firewall that you can use for Windows. I‘ve been using it for the past few years and will continue to do so. It uses the Windows Filtering Platform (WFP), and is separate from Windows Defender. If you use Defender and are looking for some extra firewall protection, this is a good tool to add.
Archiv: Firewalls (IT Systems)
simplewall
simplewall is a free and open source connection blocker app and firewall, developed by Henry++ for Windows.
The download has been tested by an editor here on a PC and a list of features has been compiled; see below. We‘ve also created some screenshots of simplewall to illustrate the user interface and show the overall usage and features of this connection blocking program.
F-Droid: NetGuard – A simple way to block access to the internet per application
Features:
– Simple to use
– No root required
– 100% open source
– No calling home
– no tracking or analytics
– No advertisements
– Actively developed and supported
– Android 5.1 and later supported
– IPv4/IPv6 TCP/UDP supported
– Tethering supported
– Optionally allow when screen on
– Optionally block when roaming
– Optionally block system applications
– Optionally notify when an application accesses the internet
– Optionally record network usage per application per address
– Material design theme with light and dark theme
F-Droid: InviZible Pro: Tor & Firewall, DNSCrypt & I2P
Core Features:
✔ Tor Network – Achieve full anonymity, bypass censorship, and access .onion sites securely
✔ DNSCrypt – Encrypt DNS queries to prevent ISP monitoring and manipulation
✔ I2P (Invisible Internet Project) – Secure and private decentralized networking
✔ Advanced Firewall – Restrict internet access per app and block unauthorized connections
✔ No Root Access Required – Works seamlessly on all devices without modifications
✔ Maintain complete privacy without a paid VPN – Stay anonymous for free
✔ Stealth Mode – Evade Deep Packet Inspection (DPI) and regional restrictions
✔ Free & Open Source – No ads, no tracking, no compromises
F-Droid: InviZible Pro: Tor & Firewall, DNSCrypt & I2P
Core Features:
✔ Tor Network – Achieve full anonymity, bypass censorship, and access .onion sites securely
✔ DNSCrypt – Encrypt DNS queries to prevent ISP monitoring and manipulation
✔ I2P (Invisible Internet Project) – Secure and private decentralized networking
✔ Advanced Firewall – Restrict internet access per app and block unauthorized connections
✔ No Root Access Required – Works seamlessly on all devices without modifications
✔ Maintain complete privacy without a paid VPN – Stay anonymous for free
✔ Stealth Mode – Evade Deep Packet Inspection (DPI) and regional restrictions
✔ Free & Open Source – No ads, no tracking, no compromises
F-Droid: Karma Firewall
Ever wondered why lots of apps that have no need for Internet access require Internet Permissions? Its usually either to display adverts or send your sensitive data back to servers in USA, China or Russia. Karma Firewall can block this traffic and protect your personal data. You do not need any technical skills to use, no complicated IP Addressing, Ports, Packet Filtering etc. Simply select the apps you want to block, and you are protected.
Karma Firewall is the safest, most trusted Android Firewall. Karma FW is completely different from all other VPN Firewalls. We intercept no allowed traffic. Karma FW requires NO Internet permissions. Without Internet permissions Karma FW CANNOT steal your data and send it anywhere.
F-Droid: InviZible Pro: Tor & Firewall, DNSCrypt & I2P
Core Features:
✔ Tor Network – Achieve full anonymity, bypass censorship, and access .onion sites securely
✔ DNSCrypt – Encrypt DNS queries to prevent ISP monitoring and manipulation
✔ I2P (Invisible Internet Project) – Secure and private decentralized networking
✔ Advanced Firewall – Restrict internet access per app and block unauthorized connections
✔ No Root Access Required – Works seamlessly on all devices without modifications
✔ Maintain complete privacy without a paid VPN – Stay anonymous for free
✔ Stealth Mode – Evade Deep Packet Inspection (DPI) and regional restrictions
✔ Free & Open Source – No ads, no tracking, no compromises
F-Droid: Karma Firewall
Ever wondered why lots of apps that have no need for Internet access require Internet Permissions? Its usually either to display adverts or send your sensitive data back to servers in USA, China or Russia. Karma Firewall can block this traffic and protect your personal data. You do not need any technical skills to use, no complicated IP Addressing, Ports, Packet Filtering etc. Simply select the apps you want to block, and you are protected.
Karma Firewall is the safest, most trusted Android Firewall. Karma FW is completely different from all other VPN Firewalls. We intercept no allowed traffic. Karma FW requires NO Internet permissions. Without Internet permissions Karma FW CANNOT steal your data and send it anywhere.