Portmaster is an application firewall that does the heavy lifting for you. Restore privacy and take back control over all your computer’s network activity.
Portmaster integrates into network stack using nfqueue on Linux.
This is free and open source software.
Key Features
- Monitor all network activity – discover everything that is happening on your computer. Expose every connection your applications make and detect evil ones. Finally get the power to act accordingly.
- Full control: block anything.
- Automatically block trackers and malware.
- Set global and per‑app settings – make your own rules. Completely cut off applications from the Internet. Or block all p2p connections except for certain apps. Or never connect to specific countries. Portmaster has you covered.
- Secure DNS (Doh/DoT):
- Define allowed network scopes: Localhost, LAN, Internet, P2P, Inbound.
- Easy rules based on internet entities: Domain, IP, country and more.
- Filter lists block common malware, ad, tracker domains etc.
- Cross-platform support – runs under Linux and Windows.
Website: github.com/safing/portmaster
Support:
Developer: Safing ICS Technologies GmbH
License: GNU General Public License v3.0
Portmaster is written in Go, C and TypeScript. Learn Go with our recommended free books and free tutorials. Learn C with our recommended free books and free tutorials. Learn TypeScript with our recommended free books and free tutorials.
Related Software
| Firewalls | |
|---|---|
| OpenSnitch | Interactive application firewall |
| nftables | Provides a new in-kernel packet classification framework |
| Firewalld | Dynamically managed firewall with support for network/firewall zones |
| Portmaster | Application firewall that does the heavy lifting |
| iptables | Configure the Linux 2.4.x and later packet filtering ruleset |
| ufw | Uncomplicated Firewall. This is software for managing a netfilter firewall |
| Shorewall | High-level tool for configuring Netfilter |
| gufw | Easy, intuitive, way to manage your Linux firewall |
| Vuurmuur | Uncomplicated Firewall, manage a netfilter firewall |
| awall | Firewall configuration tool, providing various benefits over plain iptables |
| Foomuuri | Multizone bidirectional nftables firewall |
| bgpipe | BGP reverse proxy and firewall |
Read our verdict in the software roundup.
 Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |
Hi. You need to amend the link to the Portmaster repository as it actually directs back to LinuxLinks.
Thank you.
Thanks Gio, the link had an erroneous space which I have removed.