/usr/lib/firewalld/services
Edit: /usr/lib/firewalld/services/llmnr.xml (519B)
LLMNR
Link-Local Multicast Name Resolution (LLMNR) allows both IPv4 and IPv6
hosts to perform name resolution for hosts on the same local network. This
service matches incoming queries; it will allow this host to be resolved
by other hosts. In order to allow this host to resolve other hosts, use
the llmnr-client service.