shorewall_code/Shorewall/Actions/action.dropNotSyn

#
# Shorewall -- /usr/share/shorewall/action.dropNotSyn
#
# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
#
# (c) 2017 Tom Eastep (teastep@shorewall.net)
#
# Complete documentation is available at http://shorewall.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of Version 2 of the GNU General Public License
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# dropNotSyn[([audit])]
#
###############################################################################

DEFAULTS -

?if passed(@1)
    ?if @1 eq 'audit'
        ?require AUDIT_TARGET
	A_DROP {proto=6!syn}
    ?else
        ?error "Invalid argument (@1) to dropNotSyn"
    ?endif
?else
    DROP {proto=6!syn}
?endif