shorewall_code/Shorewall/Macros/macro.NTPbrd

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#
# Shorewall version 4 - NTPbrd Macro
#
# /usr/share/shorewall/macro.NTPbrd
#
# This macro handles NTP traffic (ntpd) including replies to Broadcast
# NTP traffic.
#
# It is recommended only to use this where the source host is trusted -
# otherwise it opens up a large hole in your firewall because
# Netfilter doesn't track connections for broadcast traffic.
#
###############################################################################
?FORMAT 2
###############################################################################
#ACTION SOURCE DEST PROTO DEST SOURCE ORIGIN RATE USER/
# PORT(S) PORT(S) DEST LIMIT GROUP
PARAM - - udp 123
PARAM - - udp 1024: 123