IN THE FIELD GUIDE
safing
safing.io
Portmaster is a free and open-source application that manages all network connections on a computer to enhance privacy and security. It monitors network activity, blocks trackers and ads system-wide, and allows customizable rules per application or globally.
THE PRODUCT, BEYOND THE PITCH
Editorially reviewed · Sources checked Sep 16, 2026
A good fit for
- Users who want detailed control over their computer's network connections and enhanced privacy.
Know the limitations
- Currently supports only Windows and Linux platforms; Mac and mobile support are planned but not yet available.
- SPN primarily protects IP address exposure but does not prevent other tracking methods like fingerprinting or authentication.
What you can do
- Enhancing privacy and security by monitoring and controlling all network connections on a computer.
Features
- Monitor all network activity in real time and block unwanted connections individually or by rule.
- Block ads and trackers at the DNS level across all applications, not just browsers, with customizable rules.
- Set global and per-application rules to cut off internet access, block connection types, or restrict connections by country.
- Routes all DNS queries over DNS-over-TLS to secure DNS by default.
- Blocks incoming connections, filters trackers and malware hosts by default using trusted filter lists.
Integrations
Not confirmed yet.
Platforms & data export
- Available for Windows and Linux distributions including Debian/Ubuntu and Fedora.
THE COST FOR YOUR TEAM
Go beyond the starting price.
Published plan prices for your team size and usage. Results update as you type. Taxes, currency conversion and unlisted add-ons are excluded, and anything the source did not state is called out rather than guessed.
Known monthly subtotal
$0.00/month
1 of 1 tools could not be priced with these inputs, so this is not the full cost.
| Tool / plan | Monthly | Per year | What this assumes |
|---|---|---|---|
| No pricing recorded yet. Check the official site, or ask the owner to add it. | |||
A practical workflow
- Enable SPN to route all internet connections through it, with the option to create exceptions for specific apps or processes.
- SPN routes every connection individually, so multiple connections from the same app get different IP addresses.
- Users can safely log in to sites via SPN as HTTPS encrypts connection content before SPN applies onion encryption.
Based on the sources below. Editorial review does not imply hands-on product testing.
Alternatives to explore
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