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macOS App Firewall for Apps, Domains, IPs & Ports - iNTM

Control Mac app connections with a local macOS app firewall. Create rules for apps, domains, IPs, and ports while investigating traffic in real time.

  • Control Mac app connections with a local macOS app firewall. Create rules for apps, domains, IPs, and ports while investigating traffic in real time.
  • Control which Mac apps can connect to the network, inspect connection attempts in real time, and create local firewall rules without sending traffic content to a cloud service.
  • Quick answer
  • What is a macOS app firewall?
  • A macOS app firewall lets you allow, block, or restrict network connections per application. A practical app firewall should show which app is connecting, where it connects, and which rule is applied so you can protect privacy without guessing.
  • Allow or block network access per Mac app
  • Create rules for domains, IP addresses, ports, and protocols
  • Review connection attempts before deciding what to allow
  • Keep firewall rules and connection metadata local
  • Firewall controls
  • App-level control with traffic context
  • Traditional firewall decisions are hard when you cannot see the app, endpoint, or pattern behind a connection. iNTM combines app firewall rules with live network monitoring so each rule has context.
  • Per-app firewall rules
  • Allow, block, or review connections by application instead of relying only on broad system-level network access.
  • Domain-based control
  • Restrict apps from reaching specific domains after you inspect their connection behavior.
  • IP and port rules
  • Create precise rules for remote IP addresses, ports, and protocols when domain rules are not enough.
  • Real-time connection review
  • Use live connection details to understand what an app is doing before you decide whether to allow or block it.
  • Workflow
  • From unknown connection to clear firewall rule
  • A useful Mac firewall should help you understand a connection first, then turn that decision into a local rule.
  • Inspect live app connections
  • See the application, remote endpoint, port, protocol, and timing behind each connection attempt.
  • Identify expected and unwanted traffic
  • Compare connection behavior with traffic history and per-app usage so normal activity is easier to separate from noise.
  • Create a targeted rule
  • Block or allow the specific app, domain, IP, or port instead of disabling an app's entire network access by accident.
  • Review rule impact over time
  • Use ongoing traffic monitoring to confirm that your firewall rule works without breaking expected workflows.
  • Comparison
  • Why pair a firewall with a network monitor?
  • Blocking is easier when you can see what you are blocking. iNTM connects firewall decisions with real app traffic evidence.
  • Rule target
  • Broad allow or block decisions can hide which connection mattered.
  • Rules can target apps, domains, IP addresses, ports, and protocols.
  • Decision context
  • A connection prompt or system setting often lacks traffic history.
  • Live connections, per-app usage, and historical traffic help explain what happened.
  • Daily workflow
  • Firewall tools can feel separate from monitoring and troubleshooting.
  • Monitoring, investigation, and control stay in one native macOS workflow.
  • Privacy posture
  • Cloud dashboards can be uncomfortable for sensitive network activity.
  • Rules and traffic metadata are processed locally; packet content is not uploaded.
  • Local control for sensitive network activity
  • Firewall decisions reveal a lot about your Mac activity. iNTM keeps rule evaluation and traffic metadata on your device wherever possible.
  • Firewall rules execute locally on your Mac.
  • No account is required for core firewall and monitoring features.
  • Connection logs and rule data stay in the local app sandbox.
  • Packet payloads, passwords, and visited content are not uploaded.
  • Related visibility
  • Start with traffic visibility, then control connections
  • Firewall rules are stronger when they come from real connection evidence. Pair this page with the network traffic monitor workflow.
  • macOS Network Traffic Monitor
  • See real-time bandwidth, per-app usage, endpoints, history, and suspicious traffic spikes.
  • View Traffic Use Case
  • Firewall and Privacy FAQ
  • Review common questions about local processing, licensing, firewall behavior, and support.
  • Read FAQ
  • macOS app firewall FAQ
  • Can iNTM block a specific Mac app from the internet?
  • Yes. iNTM is designed for app-level firewall control, so you can create rules around a specific application's network access.
  • Can I block by domain, IP address, or port?
  • Yes. iNTM supports local firewall rules for apps, domains, IP addresses, ports, and protocols.
  • How is this different from only using the built-in macOS firewall?
  • The built-in macOS firewall focuses on inbound access. iNTM adds app-focused monitoring, outbound connection visibility, and rule workflows for traffic you want to investigate and control.
  • Does iNTM show why a firewall rule matched?
  • iNTM connects firewall control with application, endpoint, port, protocol, timing, and traffic context so rules are easier to understand and adjust.
  • Will firewall rules be processed in the cloud?
  • No. Firewall rules execute locally on your Mac, and traffic content is not uploaded for rule evaluation.
  • Can I use firewall control together with network traffic monitoring?
  • Yes. That is the core workflow: monitor traffic, inspect app connections, then create a precise local firewall rule when needed.

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