config OSX firewall programmatically
Posted shael
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osx firewall configuration file is : /Library/Preferences/com.apple.alf.plist
the default plist and firewall programs are under:/usr/libexec/ApplicationFirewall
To configure the firewall to block all incoming traffic:
/usr/libexec/ApplicationFirewall/socketfilterfw --setblockall on
To see if block all is enabled:
/usr/libexec/ApplicationFirewall/socketfilterfw --getblockall
The output would be as follows, if successful:
Firewall is set to block all non-essential incoming connections
A couple of global options that can be set. Stealth Mode:
/usr/libexec/ApplicationFirewall/socketfilterfw --setstealthmode on
To check if stealth mode is enabled:
/usr/libexec/ApplicationFirewall/socketfilterfw --getstealthmode
To turn on firewall logging:
/usr/libexec/ApplicationFirewall/socketfilterfw --setloggingmode on
To control the verbosity of logs, using throttled, brief or detail:
/usr/libexec/ApplicationFirewall/socketfilterfw --setloggingopt: detail
To start the firewall:
/usr/libexec/ApplicationFirewall/socketfilterfw --setglobalstate on
To sanity check whether it’s started:
/usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate
To allow signed applications:
/usr/libexec/ApplicationFirewall/socketfilterfw --setallowsigned on
To check if you allow signed apps:
/usr/libexec/ApplicationFirewall/socketfilterfw --getallowsigned
To show the status of each filtered application:
/usr/libexec/ApplicationFirewall/socketfilterfw --listapps
To check if an app is blocked:
/usr/libexec/ApplicationFirewall/socketfilterfw –getappblocked /Applications/MyApp.app/Contents/MacOS/myapp
This shows the number of exceptions, explicitly allowed apps and signed exceptions as well as process names and allowed app statuses. There is also a list of TRUSTEDAPPS, which will initially be populated by Apple tools with sharing capabilities (e.g. httpd & smbd). If you are enabling the firewall using a script, first sign your applications that need to allow sharing but are not in the TRUSTEDAPPS section by using the -s option along with the application binary (not the .app bundle):
/usr/libexec/ApplicationFirewall/socketfilterfw -s /Applications/MyApp.app/Contents/MacOS/myapp
Once signed, verify the signature:
/usr/libexec/ApplicationFirewall/socketfilterfw -v /Applications/MyApp.app/Contents/MacOS/myapp
Once signed, trust the application using the –add option:
/usr/libexec/ApplicationFirewall/socketfilterfw --add /Applications/MyApp.app/Contents/MacOS/myapp
To see a list of trusted applications:
/usr/libexec/ApplicationFirewall/socketfilterfw -l
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