SymptomsParallels H-Sphere Control Panel can not pass PCI (payment card industry) scan because off the following Security warning found on port/service "mdns (5353/udp)":
ResolutionFilter incoming traffic to UDP port 5353 if desired.
# netstat -anp|grep 5353
udp 0 0 0.0.0.0:5353 0.0.0.0:* 2013/avahi-daemon:
udp 0 0 :::5353 :::* 2013/avahi-daemon:
avahi is the daemon which runs on client machines to perform Zeroconf service discovery on a network.
Parallels H-Sphere do not requires the service to be run, so it is required to completely disable it.
The following tools used to disable services:
# service avahi-daemon stop
# chkconfig avahi-daemon off
# chkconfig --del avahi-daemon