This is very useful in identifying apps that are constantly attempting to connect and disconnect. That command lists the entire firewall log up to this point in time, then lists any new entries as they are added (see image below). Has anyone else encountered this scenario, and perhaps more importantly, is there a known fix to getting the logging working as expected? (FWIW, it appears that all other log files are writing at least somewhat regularly. Once launched, type in the following command: tail -f /var/log/appfirewall.log. Similar scenarios have been articulated in the links below, but there appears to be no final resolution. I have enabled the built-in firewall on my MacBook (Sierra v10.12.1), but unfortunately the log files located in /var/log (appfirewall.log and alf.log) stay empty. I've attempted to review and adjust log settings, and despite these efforts I still see nothing being logged. What/who is it, and do I must have it or can I just block it.I do not reme. My issue is that the appfirewall.log file is created but never gets any data put into it. Among others that I recognize, I have the 'imagent' been allowed to pass true my firewall (allow incoming connection). In both cases, regardless of OS, I can enable no issue, and run the Sudo command to enable the details logs. I cross-referenced with another Mac of mine, and noticed that it also had a blank /var/log/appfirewall.log file, and it's last write date was exactly the same.Īfter a few online searches, I see that this may be an issue that has persisted for some users since MacOS 10.12.x (I'm currently on 10.13.6). Working on my Mac (OS X High Sierra) and my OS X VM (Mojave), and trying to enable the app firewall, as well as the PF firewall. To my dismay, the /var/log/appfirewall.log file is completely empty despite having a last modified date of October 22, 2017. ![]() ![]() If you don’t see the Devices list, click the Sidebar button in the Favorites bar. You can confirm firewall logging is enabled on your Mac OS X system by running the following commands in Terminal sequentially. In the Console app on your Mac, in the Devices list on the left, select the device you want to view log messages for (such as your Mac, iPhone, iPad, Apple Watch, or Apple TV). I've noticed some odd behavior on my Mac (firewall will sporadically turn itself off and on), and attempted to review the local firewall log as part of my troubleshooting efforts. The Mac OS X firewall log is located in Utilities -> Console in /var/log/appfirewall.log.
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