PacketShield vs Portmaster
PacketShield vs Portmaster
Portmaster by Safing is an open-source application firewall for Windows and Linux with filter lists, DNS protection and optional paid extras. PacketShield is narrower on purpose: a quick view of which apps are online and one-click blocking of apps and domains.
Try PacketShield free| Feature | PacketShield | Portmaster |
|---|---|---|
| Platforms | Windows 10/11 and Linux | Windows and Linux |
| Block apps and domains | Yes | Yes |
| Community filter lists | No | Yes |
| Open source | No | Yes |
| Learning curve | Low — one screen, one click | More settings to explore |
| Pricing model | Free during public beta, no subscription | Free core + optional paid plans |
Information about other products is general and may change; check each vendor for current details.
Choose Portmaster if…
- You want open source and community-maintained block lists.
- You want extras such as a privacy network, available in paid plans.
Choose PacketShield if…
- You want the fastest path from "what is this app doing?" to "blocked".
- You prefer fewer settings and a compact, modern interface.
Frequently asked questions
Is PacketShield simpler than Portmaster?
Yes, by design. PacketShield shows live apps and domains and blocks them in one click; Portmaster offers more knobs, lists and network features.
Can I use PacketShield on Linux like Portmaster?
Yes. PacketShield runs as a systemd service on Linux using iptables and cgroups for per-app rules.
Should I run both at the same time?
No. Two application firewalls filtering the same traffic make troubleshooting hard; pick one.