# # Shorewall 4 - NotSyn Action # # /usr/share/shorewall/action.NotSyn # # This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt] # # (c) 2011 - 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. # # NotSyn[([<action>|-[,{audit|-}])] # # Default action is DROP # ########################################################################################## FORMAT 2 DEFAULTS DROP,- BEGIN PERL; use Shorewall::IPAddrs; use Shorewall::Config; use Shorewall::Chains; my ( $action, $audit ) = get_action_params( 2 ); fatal_error "Invalid parameter ($audit) to action NotSyn" if supplied $audit && $audit ne 'audit'; fatal_error "Invalid parameter ($action) to action NotSyn" unless $action =~ /^(?:ACCEPT|DROP|REJECT)$/; my $chainref = get_action_chain; my ( $level, $tag ) = get_action_logging; my $target = require_audit ( $action , $audit ); log_rule_limit $level, $chainref, 'NotSyn' , $action, '', $tag, 'add', '-p 6 ! --syn ' if $level ne ''; add_jump $chainref , $target, 0, '-p 6 ! --syn '; allow_optimize( $chainref ); 1; END PERL;