View & Watch Firewall Log on Mac OS

Check tutorial of How to View & Watch the Firewall Log in Mac OS X

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Users who have enabled the firewall in Mac OS X may find it helpful to view, read, and monitor associated logs with the system firewall. As you’d expect, the app’s firewall logs show which applications and processes have tried to connect to the Mac, including accepted and denied connections.

There are several ways to view and view the firewall in OS X, we’ll show you how to do this with a simple GUI app and with the command line.

Note that if you have Stealth Mode enabled or block every incoming connection attempt, your firewall log will likely look different, if not outright invalid for certain types of connections. Likewise, if you’ve disabled the firewall, you won’t see anything either, simply because there is no firewall to log connections. Additionally, if you are behind a hardware firewall like the one in a typical Wi-Fi router or network, your firewall log data will look different from a machine open to the wide world.

Read firewall logs with the console app in Mac OS X

The easiest way for most users to read and view the firewall logs in OS X is through the common log viewing application called Console:

  1. Press Command + Spacebar to bring up up Spotlight and type “Console”, then press Return on the Console app to launch the application (located in / Applications / Utilities / if you want to start it manually)
  2. In the Log List menu on the left, look under the “Files” section and click the triangle next to / var / log to open that log list
  3. Select “appfirewall.log” from the sidebar log list to load the firewall login in the right console panel

View the application's firewall log in Mac OS X with the Console app

A quick example of the console firewall logging activity might look something like this:

November 2 11:14:31 AM Retina-MacBook-Pro connection filterfw : kdc: Allow TCP LISTENING (in: 0 out: 2) Nov 5 2:58:33 PM Retina-MacBook-Pro socketfilterfw : launchd: Allow TCP LISTEN (in: 0 out: 1) November 5 14:58:33 Retina-MacBook-Pro socketfilterfw : launchd: Allow TCP LISTEN (in: 0 out: 1) Nov 5 15:57:52 Retina-MacBook-Pro socketfilterfw : launchd: Allow TCP LISTEN (in: 0 out: 2) Nov 9 4:43:41 PM Retina-MacBook-Pro socketfilterfw : iTunes: Allow TCP LISTENING (in: 0 out: 1) Nov 12 11:32:57 PM Retina-MacBook-Pro socketfilterfw : iTunes: Allow TCP LISTENING (in: 0 out: 1) Nov 18 11:37:49 Retina-MacBook-Pro socketfilterfw : iTunes: Allow TCP LISTENING (in: 0 out: 1) Nov 18 21:28:43 Retina-MacBook-Pro socketfilterfw : AppleFileServer: Allow TCP-CONNECT (in: 2 out: 0)

The firewall log displayed in Console is updated when new connections are made, allowed and denied.

View firewall logs from the command line

From the command line, you have several methods to read and view the firewall log in OS X. If you just want to view the existing log as it is and not when it is updated with new connection information, you can use cat or more in Terminal app:

more /var/log/appfirewall.log

You can then scroll through the log as usual with the arrow buttons and return. Exit More when you are done viewing the firewall log.

Reading the firewall logs in Mac OS X

To track a live updated version of the firewall log, use tail -f instead, like so:

tail -f /var/log/appfirewall.log

Using Tail if it is similar to viewing the firewall log from the console application in the GUI, except of course you are in OS X’s Terminal.

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How to View & Watch the Firewall Log in Mac OS X: FAQ

Tutorial Summary: How to View & Watch the Firewall Log in Mac OS X

In this guide, we told you about How to View & Watch the Firewall Log in Mac OS X; please read all steps so that you understand How to View & Watch the Firewall Log in Mac OS X in case if you need any assistance from us, then contact us.

How this tutorial helping you?

So in this guide, we discuss the How to View & Watch the Firewall Log in Mac OS X, which undoubtedly helps you.

What is actual time in which this method complete?

The time to complete the How to View & Watch the Firewall Log in Mac OS X tutorial is 10+ minutes.

What are the supported Device?

Apple

What are the supported Operating system?

mac OS


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