Ensure NFS Server Is Disabled

MediumLevel 1Automatedmacos

Description

macOS can act as an NFS fileserver. NFS sharing could be enabled to allow someone on another computer to mount shares and gain access to information from the user's computer. File sharing from a user endpoint has long been considered questionable, and Apple has removed that capability from the GUI.

How it is checked

Audit method: Shell command

shell

s=$(/sbin/nfsd status 2>/dev/null | /usr/bin/awk '/nfsd service/ { print $NF }') || exit 1
if [ "$s" = disabled ] && [ ! -e /etc/exports ]; then echo compliant; else echo "nfsd=${s:-unknown}; /etc/exports present or service enabled"; fi

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Terminal: sudo /bin/launchctl disable system/com.apple.nfsd ; sudo /bin/rm -rf /etc/exports.

Properties

Operating systems: macos-15
Tags: macosnetwork
Reference: CIS Apple macOS 15.0 Sequoia Benchmark v2.1.0 - 4.3 Ensure NFS Server 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