diff --git a/Shorewall/action.RST b/Shorewall/action.RST new file mode 100644 index 000000000..10a8a5d99 --- /dev/null +++ b/Shorewall/action.RST @@ -0,0 +1,56 @@ +# +# Shorewall 4 - RST Action +# +# /usr/share/shorewall/action.RST +# +# 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. +# +# RST[([|-[,{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, 'RST' , $action, '', $tag, 'add', '-p 6 --tcp-flags RST RST ' if $level ne ''; +add_jump $chainref , $target, 0, '-p 6 --tcp-flags RST RST, '; + +allow_optimize( $chainref ); + +1; + +END PERL; diff --git a/Shorewall/actions.std b/Shorewall/actions.std index fcb7a30ae..d0996931a 100644 --- a/Shorewall/actions.std +++ b/Shorewall/actions.std @@ -41,4 +41,5 @@ DropSmurfs # Drop smurf packets Invalid # Handles packets in the INVALID conntrack state NotSyn # Handles TCP packets which do not have SYN=1 and ACK=0 Reject # Default Action for REJECT policy +RST # Handle packets with RST set TCPFlags # Handle bad flag combinations.