mirror of
https://gitlab.com/shorewall/code.git
synced 2024-12-18 20:30:43 +01:00
Restore blacklst and blackout chains
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
2c441b5393
commit
f9960a0c94
@ -65,6 +65,7 @@ our @EXPORT = qw(
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dont_delete
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dont_delete
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dont_move
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dont_move
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get_action_logging
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get_action_logging
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add_interface_options
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%chain_table
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%chain_table
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%helpers
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%helpers
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@ -1496,7 +1497,7 @@ sub copy_rules( $$;$ ) {
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progress_message " $count rules from $chain1->{name} appended to $chain2->{name}" if $count;
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progress_message " $count rules from $chain1->{name} appended to $chain2->{name}" if $count;
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unless ( --$chain1->{references}{$name2} ) {
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unless ( $nojump || --$chain1->{references}{$name2} ) {
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delete $chain1->{references}{$name2};
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delete $chain1->{references}{$name2};
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delete_chain_and_references( $chain1 ) unless keys %{$chain1->{references}};
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delete_chain_and_references( $chain1 ) unless keys %{$chain1->{references}};
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}
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}
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@ -5801,6 +5802,91 @@ sub expand_rule( $$$$$$$$$$;$ )
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$diface;
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$diface;
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}
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}
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sub copy_options( $ ) {
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keys %{interface_zones( shift )} == 1;
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}
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sub add_interface_options( $ ) {
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my $blrules = shift;
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if ( $blrules ) {
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#
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# Insert all interface option rules into the rules chains
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#
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for my $zone1 ( off_firewall_zones ) {
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my @interfaces = keys %{zone_interfaces( $zone1 )};
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for my $zone2 ( all_zones ) {
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my $chainref = $filter_table->{rules_chain( $zone1, $zone2 )};
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if ( zone_type( $zone2 ) & (FIREWALL | VSERVER ) ) {
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if ( @interfaces == 1 && copy_options( $interfaces[0] ) ) {
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if ( my $chain1ref = $filter_table->{input_option_chain $interfaces[0]} ) {
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copy_rules $chain1ref, $chainref, 1;
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$chainref->{referenced} = 1;
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}
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} else {
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for my $interface ( @interfaces ) {
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if ( my $chain1ref = $filter_table->{forward_option_chain $interface} ) {
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add_ijump ( $chainref , j => $chain1ref->{name}, @interfaces > 1 ? imatch_source_dev( $interface ) : () );
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}
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}
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}
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} else {
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if ( @interfaces == 1 && copy_options( $interfaces[0] ) ) {
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if ( my $chain1ref = $filter_table->{forward_option_chain $interfaces[0]} ) {
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copy_rules $chain1ref, $chainref, 1;
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$chainref->{referenced} = 1;
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}
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} else {
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for my $interface ( @interfaces ) {
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if ( my $chain1ref = $filter_table->{forward_option_chain $interface} ) {
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add_ijump ( $chainref , j => $chain1ref->{name}, @interfaces > 1 ? imatch_source_dev( $interface ) : () );
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}
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}
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}
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}
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}
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}
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for my $zone1 ( firewall_zone, vserver_zones ) {
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for my $zone2 ( off_firewall_zones ) {
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my $chainref = $filter_table->{rules_chain( $zone1, $zone2 )};
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my @interfaces = keys %{zone_interfaces( $zone2 )};
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for my $interface ( @interfaces ) {
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if ( my $chain1ref = $filter_table->{output_option_chain $interface} ) {
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add_ijump ( $chainref , j => $chain1ref->{name}, @interfaces > 1 ? imatch_dest_dev( $interface ) : () );
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}
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}
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}
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}
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} else {
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#
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# Simply move the option chain rules to the interface chains
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#
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for my $interface ( grep $_ ne '%vserver%', all_interfaces ) {
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my $chainref;
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my $chain1ref;
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if ( ( $chainref = $filter_table->{input_option_chain $interface} ) && @{$chainref->{rules}} ) {
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move_rules $chainref, $chain1ref = $filter_table->{input_chain $interface};
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set_interface_option( $interface, 'use_input_chain', 1 );
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}
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if ( ( $chainref = $filter_table->{forward_option_chain $interface} ) && @{$chainref->{rules}} ) {
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move_rules $chainref, $chain1ref = $filter_table->{forward_chain $interface};
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set_interface_option( $interface, 'use_forward_chain' , 1 );
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}
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if ( ( $chainref = $filter_table->{output_option_chain $interface} ) && @{$chainref->{rules}} ) {
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move_rules $chainref, $chain1ref = $filter_table->{output_chain $interface};
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set_interface_option( $interface, 'use_output_chain' , 1 );
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}
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}
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}
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}
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#
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#
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# The following code generates the input to iptables-restore from the contents of the
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# The following code generates the input to iptables-restore from the contents of the
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# @rules arrays in the chain table entries.
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# @rules arrays in the chain table entries.
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@ -200,6 +200,144 @@ sub add_rule_pair( $$$$ ) {
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add_jump( $chainref , $target, 0, $predicate );
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add_jump( $chainref , $target, 0, $predicate );
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}
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}
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sub setup_blacklist() {
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my $zones = find_zones_by_option 'blacklist', 'in';
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my $zones1 = find_zones_by_option 'blacklist', 'out';
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my $chainref;
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my $chainref1;
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my ( $level, $disposition ) = @config{'BLACKLIST_LOGLEVEL', 'BLACKLIST_DISPOSITION' };
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my $audit = $disposition =~ /^A_/;
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my $target = $disposition eq 'REJECT' ? 'reject' : $disposition;
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my $orig_target = $target;
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#
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# We go ahead and generate the blacklist chains and jump to them, even if they turn out to be empty. That is necessary
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# for 'refresh' to work properly.
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#
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if ( @$zones || @$zones1 ) {
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$chainref = dont_delete new_standard_chain 'blacklst' if @$zones;
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$chainref1 = dont_delete new_standard_chain 'blackout' if @$zones1;
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if ( supplied $level ) {
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$target = ensure_blacklog_chain ( $target, $disposition, $level, $audit );
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} elsif ( $audit ) {
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require_capability 'AUDIT_TARGET', "BLACKLIST_DISPOSITION=$disposition", 's';
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$target = verify_audit( $disposition );
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}
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}
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BLACKLIST:
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{
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if ( my $fn = open_file 'blacklist' ) {
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my $first_entry = 1;
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first_entry "$doing $fn...";
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while ( read_a_line ) {
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if ( $first_entry ) {
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unless ( @$zones || @$zones1 ) {
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warning_message qq(The entries in $fn have been ignored because there are no 'blacklist' zones);
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close_file;
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last BLACKLIST;
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}
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$first_entry = 0;
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}
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my ( $networks, $protocol, $ports, $options ) = split_line 'blacklist file', { networks => 0, proto => 1, port => 2, options => 3 };
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if ( $options eq '-' ) {
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$options = 'src';
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} elsif ( $options eq 'audit' ) {
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$options = 'audit,src';
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}
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my ( $to, $from, $whitelist, $auditone ) = ( 0, 0, 0, 0 );
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my @options = split_list $options, 'option';
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for ( @options ) {
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$whitelist++ if $_ eq 'whitelist';
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$auditone++ if $_ eq 'audit';
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}
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warning_message "Duplicate 'whitelist' option ignored" if $whitelist > 1;
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my $tgt = $whitelist ? 'RETURN' : $target;
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if ( $auditone ) {
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fatal_error "'audit' not allowed in whitelist entries" if $whitelist;
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if ( $audit ) {
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warning_message "Superfluous 'audit' option ignored";
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} else {
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warning_message "Duplicate 'audit' option ignored" if $auditone > 1;
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$tgt = verify_audit( 'A_' . $target, $orig_target, $target );
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}
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}
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for ( @options ) {
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if ( $_ =~ /^(?:src|from)$/ ) {
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if ( $from++ ) {
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warning_message "Duplicate 'src' ignored";
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} else {
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if ( @$zones ) {
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expand_rule(
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$chainref ,
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NO_RESTRICT ,
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do_proto( $protocol , $ports, '' ) ,
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$networks,
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'',
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'' ,
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$tgt ,
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'' ,
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$tgt ,
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'' );
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} else {
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warning_message '"src" entry ignored because there are no "blacklist in" zones';
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}
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}
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} elsif ( $_ =~ /^(?:dst|to)$/ ) {
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if ( $to++ ) {
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warning_message "Duplicate 'dst' ignored";
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} else {
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if ( @$zones1 ) {
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expand_rule(
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$chainref1 ,
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NO_RESTRICT ,
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do_proto( $protocol , $ports, '' ) ,
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'',
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$networks,
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'' ,
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$tgt ,
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'' ,
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$tgt ,
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'' );
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} else {
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warning_message '"dst" entry ignored because there are no "blacklist out" zones';
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}
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}
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} else {
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fatal_error "Invalid blacklist option($_)" unless $_ eq 'whitelist' || $_ eq 'audit';
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}
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}
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progress_message " \"$currentline\" added to blacklist";
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}
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warning_message q(There are interfaces or zones with the 'blacklist' option but the 'blacklist' file is empty) if $first_entry && @$zones;
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} elsif ( @$zones || @$zones1 ) {
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warning_message q(There are interfaces or zones with the 'blacklist' option, but the 'blacklist' file is either missing or has zero size);
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}
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}
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}
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#
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#
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# Remove instances of 'blacklist' from the passed file.
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# Remove instances of 'blacklist' from the passed file.
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#
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#
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@ -665,6 +803,8 @@ sub add_common_rules ( $ ) {
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if ( $upgrade ) {
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if ( $upgrade ) {
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exit 0 unless convert_blacklist;
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exit 0 unless convert_blacklist;
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} else {
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setup_blacklist;
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}
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}
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$list = find_hosts_by_option 'nosmurfs';
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$list = find_hosts_by_option 'nosmurfs';
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@ -1346,9 +1486,9 @@ sub generate_matrix() {
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next if @zones <= 2 && ! $zoneref->{options}{complex};
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next if @zones <= 2 && ! $zoneref->{options}{complex};
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#
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#
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# Complex zone or we have more than one non-firewall zone -- create a zone forwarding chain
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# Complex zone or we have more than one non-firewall zone -- process_rules created a zone forwarding chain
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#
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#
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my $frwd_ref = new_standard_chain zone_forward_chain( $zone );
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my $frwd_ref = $filter_table->{zone_forward_chain( $zone )};
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add_ijump( $frwd_ref , j => 'MARK --set-mark ' . in_hex( $zoneref->{mark} ) . '/' . in_hex( $globals{ZONE_MASK} ) ) if $zoneref->{mark};
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add_ijump( $frwd_ref , j => 'MARK --set-mark ' . in_hex( $zoneref->{mark} ) . '/' . in_hex( $globals{ZONE_MASK} ) ) if $zoneref->{mark};
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@ -2490,135 +2490,69 @@ sub initiate_blacklist() {
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$blrules = 1;
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$blrules = 1;
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}
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}
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sub classic_blacklist() {
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my $fw = firewall_zone;
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my @zones = off_firewall_zones;
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my @vservers = vserver_zones;
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my @state = $config{BLACKLISTNEWONLY} ? $globals{UNTRACKED} ? state_imatch 'NEW,INVALID,UNTRACKED' : state_imatch 'NEW,INVALID' : ();
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#
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#
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# Convert a pre-4.4.25 blacklist to the 4.4.25 format and process it
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# First take care of classic blacklisting
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#
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#
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sub setup_blacklist() {
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for my $zone ( @zones ) {
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my $zones = find_zones_by_option 'blacklist', 'in';
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my $zoneref = find_zone( $zone );
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my $zones1 = find_zones_by_option 'blacklist', 'out';
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my $simple = @zones <= 2 && ! $zoneref->{options}{complex};
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my ( $level, $disposition ) = @config{'BLACKLIST_LOGLEVEL', 'BLACKLIST_DISPOSITION' };
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my $audit = $disposition =~ /^A_/;
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my $target = $disposition eq 'REJECT' ? 'reject' : $disposition;
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my $orig_target = $target;
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my @rules;
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if ( @$zones || @$zones1 ) {
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if ( $zoneref->{options}{in}{blacklist} ) {
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if ( supplied $level ) {
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my $blackref = $filter_table->{blacklst};
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$target = 'blacklog';
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add_ijump ensure_rules_chain( rules_chain( $zone, $_ ) ) , j => $blackref , @state for firewall_zone, @vservers;
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} elsif ( $audit ) {
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$target = verify_audit( $disposition );
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if ( $simple ) {
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#
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# We won't create a zone forwarding chain for this zone so we must add blacklisting jumps to the rules chains
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#
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for my $zone1 ( @zones ) {
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my $ruleschain = rules_chain( $zone, $zone1 );
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my $ruleschainref = $filter_table->{$ruleschain};
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if ( ( $zone ne $zone1 || $ruleschainref->{referenced} ) && $ruleschainref->{policy} ne 'NONE' ) {
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add_ijump( ensure_rules_chain( $ruleschain ), j => $blackref, @state );
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}
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}
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my $fn = open_file 'blacklist';
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first_entry( \&initiate_blacklist );
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while ( read_a_line ) {
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my ( $networks, $protocol, $ports, $options ) = split_line 'blacklist file', { networks => 0, proto => 1, port => 2, options => 3 };
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if ( $options eq '-' ) {
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$options = 'src';
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} elsif ( $options eq 'audit' ) {
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$options = 'audit,src';
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}
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my ( $to, $from, $whitelist, $auditone ) = ( 0, 0, 0, 0 );
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my @options = split_list $options, 'option';
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for ( @options ) {
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$whitelist++ if $_ eq 'whitelist';
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$auditone++ if $_ eq 'audit';
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}
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warning_message "Duplicate 'whitelist' option ignored" if $whitelist > 1;
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my $tgt = $whitelist ? 'WHITELIST' : $target;
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if ( $auditone ) {
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fatal_error "'audit' not allowed in whitelist entries" if $whitelist;
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if ( $audit ) {
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warning_message "Superfluous 'audit' option ignored";
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} else {
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warning_message "Duplicate 'audit' option ignored" if $auditone > 1;
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}
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|
|
||||||
$tgt = verify_audit( 'A_' . $target, $orig_target, $target );
|
|
||||||
}
|
|
||||||
|
|
||||||
for ( @options ) {
|
|
||||||
if ( $_ =~ /^(?:src|from)$/ ) {
|
|
||||||
if ( $from++ ) {
|
|
||||||
warning_message "Duplicate 'src' ignored";
|
|
||||||
} else {
|
|
||||||
if ( @$zones ) {
|
|
||||||
push @rules, [ 'src', $tgt, $networks, $protocol, $ports ];
|
|
||||||
} else {
|
|
||||||
warning_message '"src" entry ignored because there are no "blacklist in" zones';
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} elsif ( $_ =~ /^(?:dst|to)$/ ) {
|
|
||||||
if ( $to++ ) {
|
|
||||||
warning_message "Duplicate 'dst' ignored";
|
|
||||||
} else {
|
|
||||||
if ( @$zones1 ) {
|
|
||||||
push @rules, [ 'dst', $tgt, $networks, $protocol, $ports ];
|
|
||||||
} else {
|
|
||||||
warning_message '"dst" entry ignored because there are no "blacklist out" zones';
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
fatal_error "Invalid blacklist option($_)" unless $_ eq 'whitelist' || $_ eq 'audit';
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
if ( @rules ) {
|
if ( $zoneref->{options}{out}{blacklist} ) {
|
||||||
for ( @rules ) {
|
my $blackref = $filter_table->{blackout};
|
||||||
my ( $srcdst, $tgt, $networks, $protocols, $ports ) = @$_;
|
add_ijump ensure_rules_chain( rules_chain( firewall_zone, $zone ) ) , j => $blackref , @state;
|
||||||
|
|
||||||
$tgt .= "\t\t";
|
for my $zone1 ( @zones, @vservers ) {
|
||||||
|
my $ruleschain = rules_chain( $zone1, $zone );
|
||||||
|
my $ruleschainref = $filter_table->{$ruleschain};
|
||||||
|
|
||||||
my $list = $srcdst eq 'src' ? $zones : $zones1;
|
if ( ( $zone ne $zone1 || $ruleschainref->{referenced} ) && $ruleschainref->{policy} ne 'NONE' ) {
|
||||||
|
add_ijump( ensure_rules_chain( $ruleschain ), j => $blackref, @state );
|
||||||
for my $zone ( @$list ) {
|
|
||||||
$currentline = $tgt;
|
|
||||||
|
|
||||||
if ( $srcdst eq 'src' ) {
|
|
||||||
if ( $networks ne '-' ) {
|
|
||||||
$currentline .= "$zone:$networks\tall\t\t";
|
|
||||||
} else {
|
|
||||||
$currentline .= "$zone\t\t\tall\t\t";
|
|
||||||
}
|
}
|
||||||
} else {
|
|
||||||
if ( $networks ne '-' ) {
|
|
||||||
$currentline .= "all\t\t\t$zone:$networks\t";
|
|
||||||
} else {
|
|
||||||
$currentline .= "all\t\t\t$zone\t\t\t";
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
$currentline .= "\t$protocols" if $protocols ne '-';
|
unless ( $simple ) {
|
||||||
$currentline .= "\t$ports" if $ports ne '-';
|
#
|
||||||
|
# Complex zone or we have more than one non-firewall zone -- create a zone forwarding chain
|
||||||
|
#
|
||||||
|
my $frwd_ref = new_standard_chain zone_forward_chain( $zone );
|
||||||
|
|
||||||
process_rule;
|
add_ijump( $frwd_ref , j => $filter_table->{blacklst}, @state ) if $zoneref->{options}{in}{blacklist};
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
} else {
|
|
||||||
warning_message q(There are interfaces or zones with the 'blacklist' option but the 'blacklist' file is empty or does not exist) unless @rules;
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
#
|
#
|
||||||
# Process the Rules File
|
# Process the Rules File
|
||||||
#
|
#
|
||||||
sub process_rules() {
|
sub process_rules() {
|
||||||
$section = 'BLACKLIST';
|
classic_blacklist;
|
||||||
|
|
||||||
setup_blacklist;
|
$section = 'BLACKLIST';
|
||||||
|
|
||||||
my $fn = open_file 'blrules';
|
my $fn = open_file 'blrules';
|
||||||
|
|
||||||
@ -2629,74 +2563,7 @@ sub process_rules() {
|
|||||||
|
|
||||||
$section = '';
|
$section = '';
|
||||||
|
|
||||||
if ( $blrules ) {
|
add_interface_options( $blrules || $filter_table->{blacklst} );
|
||||||
#
|
|
||||||
# Insert all interface option rules into the rules chains
|
|
||||||
#
|
|
||||||
for my $zone1 ( off_firewall_zones ) {
|
|
||||||
my @interfaces = keys %{zone_interfaces( $zone1 )};
|
|
||||||
|
|
||||||
for my $zone2 ( all_zones ) {
|
|
||||||
my $chainref = $filter_table->{rules_chain( $zone1, $zone2 )};
|
|
||||||
|
|
||||||
if ( zone_type( $zone2 ) & (FIREWALL | VSERVER ) ) {
|
|
||||||
if ( @interfaces == 1 ) {
|
|
||||||
if ( my $chain1ref = $filter_table->{input_option_chain $interfaces[0]} ) {
|
|
||||||
push @{$chainref->{rules}} , @{$chain1ref->{rules}};
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
for my $interface ( @interfaces ) {
|
|
||||||
if ( my $chain1ref = $filter_table->{forward_option_chain $interface} ) {
|
|
||||||
add_ijump ( $chainref , j => $chain1ref->{name}, @interfaces > 1 ? imatch_source_dev( $interface ) : () );
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
if ( @interfaces == 1 ) {
|
|
||||||
if ( my $chain1ref = $filter_table->{forward_option_chain $interfaces[0]} ) {
|
|
||||||
push @{$chainref->{rules}} , @{$chain1ref->{rules}};
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
for my $interface ( @interfaces ) {
|
|
||||||
if ( my $chain1ref = $filter_table->{forward_option_chain $interface} ) {
|
|
||||||
add_ijump ( $chainref , j => $chain1ref->{name}, @interfaces > 1 ? imatch_source_dev( $interface ) : () );
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
for my $zone1 ( firewall_zone, vserver_zones ) {
|
|
||||||
for my $zone2 ( off_firewall_zones ) {
|
|
||||||
my $chainref = $filter_table->{rules_chain( $zone1, $zone2 )};
|
|
||||||
my @interfaces = keys %{zone_interfaces( $zone2 )};
|
|
||||||
|
|
||||||
for my $interface ( @interfaces ) {
|
|
||||||
if ( my $chain1ref = $filter_table->{output_option_chain $interface} ) {
|
|
||||||
add_ijump ( $chainref , j => $chain1ref->{name}, @interfaces > 1 ? imatch_dest_dev( $interface ) : () );
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
#
|
|
||||||
# Simply copy the option chain rules into the interface chains
|
|
||||||
#
|
|
||||||
for my $interface ( grep $_ ne '%vserver%', all_interfaces ) {
|
|
||||||
if ( my $chainref = $filter_table->{input_option_chain $interface} ) {
|
|
||||||
push @{$filter_table->{input_chain $interface}->{rules}}, @{$chainref->{rules}};
|
|
||||||
}
|
|
||||||
|
|
||||||
if ( my $chainref = $filter_table->{forward_option_chain $interface} ) {
|
|
||||||
push @{$filter_table->{forward_chain $interface}->{rules}}, @{$chainref->{rules}};
|
|
||||||
}
|
|
||||||
|
|
||||||
if ( my $chainref = $filter_table->{output_option_chain $interface} ) {
|
|
||||||
push @{$filter_table->{output_chain $interface}->{rules}}, @{$chainref->{rules}};
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
$fn = open_file 'rules';
|
$fn = open_file 'rules';
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user