macOS
TMA-MACOS15-4.1
Ensure Bonjour Advertising Services Is Disabled
LowLevel 2Automatedmacos
Description
Bonjour is an auto-discovery mechanism for TCP/IP devices which enumerates devices and services within a local subnet. DNS on macOS is integrated with Bonjour and should not be turned off, but the Bonjour advertising service can be disabled.
How it is checked
Audit method: Shell command
shell
/usr/bin/osascript -l JavaScript <<'EOS'
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.mDNSResponder').objectForKey('NoMulticastAdvertisements').js
EOS- Expected output
true
How it is fixed
Fix method: Guidance or infrastructure patch
Profile (preferred): com.apple.mDNSResponder NoMulticastAdvertisements. Terminal: sudo /usr/bin/defaults write /Library/Preferences/com.apple.mDNSResponder.plist NoMulticastAdvertisements -bool true.
Properties
- Operating systems
- macos-15
- Tags
- macosnetwork
- Reference
- CIS Apple macOS 15.0 Sequoia Benchmark v2.1.0 - 4.1 Ensure Bonjour Advertising Services Is Disabled
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
shell
tmaegis scan --target macos --level 2