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71 lines
2.4 KiB
Plaintext
71 lines
2.4 KiB
Plaintext
#
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# Shorewall -- /usr/share/shorewall/action.Limit
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#
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# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
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#
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# (c) 2017 Tom Eastep (teastep@shorewall.net)
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#
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# Complete documentation is available at http://shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Limit(<recent-set>,<num-connections>,<timeout>)
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#
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###############################################################################
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DEFAULTS -,-,-
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?begin perl
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use strict;
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use Shorewall::Config;
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use Shorewall::Chains;
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my $chainref = get_action_chain;
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my @param = get_action_params(3);
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my ( $level, $tag ) = get_action_logging;
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@param = split( ',', $tag ), $tag = $param[0] unless supplied( join '', @param );
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fatal_error 'Limit rules must include <set name>,<max connections>,<interval> as the log tag or as parameters' unless @param == 3;
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my $set = $param[0];
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for ( @param[1,2] ) {
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fatal_error 'Max connections and interval in Limit rules must be numeric (' . join( ':', 'Limit', $level eq '' ? 'none' : $level, $tag ) . ')' unless /^\d+$/
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}
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my $count = $param[1] + 1;
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require_capability( 'RECENT_MATCH' , 'Limit rules' , '' );
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warning_message "The Limit action is deprecated in favor of per-IP rate limiting using the RATE LIMIT column";
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add_irule $chainref, recent => "--name $set --set";
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if ( $level ne '' ) {
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my $xchainref = new_chain 'filter' , "$chainref->{name}%";
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log_irule_limit( $level, $xchainref, '', 'DROP', [], $tag, 'add' , '' );
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add_ijump $xchainref, j => 'DROP';
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add_ijump $chainref, j => $xchainref, recent => "--name $set --update --seconds $param[2] --hitcount $count";
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} else {
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add_ijump $chainref, j => 'DROP', recent => "--update --name $set --seconds $param[2] --hitcount $count";
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}
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add_ijump $chainref, j => 'ACCEPT';
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1;
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?end perl
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