/usr/share/shorewall/macro.mDNS is in shorewall 4.5.21.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | #
# Shorewall version 4 - Multicast DNS Macro -- this macro assumes that only
# the DEST zone sends mDNS queries. If both zones send
# queries, use the mDNSbi macro.
#
# /usr/share/shorewall/macro.mDNS
#
# This macro handles multicast DNS traffic
#
###############################################################################
#ACTION SOURCE DEST PROTO DEST SOURCE RATE USER/
# PORT(S) PORT(S) LIMIT GROUP
PARAM - 224.0.0.251 udp 5353
PARAM - - udp 1024: 5353
PARAM - 224.0.0.251 2
PARAM DEST SOURCE:224.0.0.251 udp 5353
PARAM DEST SOURCE:224.0.0.251 2
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