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2.2.3 Ensure Avahi Server is not enabled (Scored)
Profile Applicability
Level 1 - Server Level 1 - Workstation
Description
Avahi is a free zeroconf implementation, including a system for multicast DNS/DNS-SD service discovery. Avahi allows programs to publish and discover services and hosts running on a local network with no specific configuration. For example, a user can plug a computer into a network and Avahi automatically finds printers to print to, files to look at and people to talk to, as well as network services running on the machine.
Rationale
Automatic discovery of network services is not normally required for system functionality. It is recommended to disable the service to reduce the potential attach surface.
Audit
Run the following command to verify avahi-daemon is not enabled:
# systemctl is-enabled avahi-daemon disabled
Verify result is not “enabled”.
Remediation
Run the following command to disable avahi-daemon:
systemctl disable avahi-daemon