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42 lines
975 B
Plaintext
42 lines
975 B
Plaintext
#
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# Shorewall version 4 - Drop TCPFlags Action
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#
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# /usr/share/shorewall/action.TCPFlags
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#
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# Accepts a single optional parameter:
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#
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# - = Do not Audit
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# audit = Audit dropped packets.
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#
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#################################################################################
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?FORMAT 2
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DEFAULTS DROP,-
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?BEGIN PERL;
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use strict;
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use Shorewall::Config qw(:DEFAULT F_IPV4 F_IPV6);
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use Shorewall::Chains;
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use Shorewall::Rules;
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my ( $action, $audit ) = get_action_params( 2 );
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my $chainref = get_action_chain;
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if ( supplied $audit ) {
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fatal_error "Invalid parameter ($audit) to action TCPFlags" if $audit ne 'audit';
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$action = "A_$action";
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}
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perl_action_tcp_helper( $action, '-p tcp --tcp-flags ALL FIN,URG,PSH' );
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perl_action_tcp_helper( $action, '-p tcp --tcp-flags SYN,RST SYN,RST' );
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perl_action_tcp_helper( $action, '-p tcp --tcp-flags SYN,FIN SYN,FIN' );
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perl_action_tcp_helper( $action, '-p tcp --syn --sport 0' );
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?END PERL;
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