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Handle essential IPv6-ICMP types when firewall is stopped

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Signed-off-by: Tom Eastep <teastep@shorewall.net>
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Tom Eastep 2020-02-06 15:21:51 -08:00
parent 5f50b70618
commit 4efac2fda1
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GPG Key ID: 96E6B3F2423A4D10
1 changed files with 20 additions and 6 deletions
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26
Shorewall/Perl/Shorewall/Misc.pm
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@ -2540,6 +2540,7 @@ sub compile_stop_firewall( $$$$ ) {
my $input = $filter_table->{INPUT};
my $output = $filter_table->{OUTPUT};
my $forward = $filter_table->{FORWARD};
my $absentminded = $config{ ADMINISABSENTMINDED };
emit <<'EOF';
#
@ -2547,7 +2548,7 @@ sub compile_stop_firewall( $$$$ ) {
#
stop_firewall() {
EOF
$output->{policy} = 'ACCEPT' if $config{ADMINISABSENTMINDED};
$output->{policy} = 'ACCEPT' if $absentminded;
if ( $family == F_IPV4 ) {
emit <<'EOF';
@ -2706,7 +2707,7 @@ EOF
#
create_docker_rules if $config{DOCKER};
if ( $config{ADMINISABSENTMINDED} ) {
if ( $absentminded ) {
add_ijump $filter_table ->{$_}, j => 'ACCEPT', state_imatch 'ESTABLISHED,RELATED' for qw/INPUT FORWARD/;
}
@ -2715,7 +2716,7 @@ EOF
add_ijump $input, j => 'ACCEPT', d => IPv6_LINKLOCAL;
add_ijump $input, j => 'ACCEPT', d => IPv6_MULTICAST;
unless ( $config{ADMINISABSENTMINDED} ) {
unless ( $absentminded ) {
add_ijump $output, j => 'ACCEPT', d => IPv6_LINKLOCAL;
add_ijump $output, j => 'ACCEPT', d => IPv6_MULTICAST;
}
@ -2729,12 +2730,25 @@ EOF
process_stoppedrules;
if ( $family == F_IPV6 ) {
my $chain = new_action_chain( 'filter', 'AllowICMPs' );
for my $type ( 1, 2, 3, 4, 130, 131, 132, 133, 134, 135, 136, 137, 141, 142, 143, 148, 149, 151, 152, 153 ) {
add_ijump( $chain, j => 'ACCEPT', p => IPv6_ICMP . " --icmpv6-type $type" );
}
for $chain ( $input, $output, $forward ) {
next if $chain eq $output && $absentminded;
add_ijump( $chain, j => 'AllowICMPs', p => IPv6_ICMP );
}
}
if ( have_capability 'IFACE_MATCH' ) {
add_ijump $input, j => 'ACCEPT', iface => '--dev-in --loopback';
add_ijump $output, j => 'ACCEPT', iface => '--dev-out --loopback' unless $config{ADMINISABSENTMINDED};
add_ijump $output, j => 'ACCEPT', iface => '--dev-out --loopback' unless $absentminded;
} else {
add_ijump $input, j => 'ACCEPT', i => loopback_interface;
add_ijump $output, j => 'ACCEPT', o => loopback_interface unless $config{ADMINISABSENTMINDED};
add_ijump $output, j => 'ACCEPT', o => loopback_interface unless $absentminded;
}
my $interfaces = find_interfaces_by_option 'dhcp';
@ -2744,7 +2758,7 @@ EOF
for my $interface ( @$interfaces ) {
add_ijump $input, j => 'ACCEPT', p => "udp --dport $ports", imatch_source_dev( $interface );
add_ijump $output, j => 'ACCEPT', p => "udp --dport $ports", imatch_dest_dev( $interface ) unless $config{ADMINISABSENTMINDED};
add_ijump $output, j => 'ACCEPT', p => "udp --dport $ports", imatch_dest_dev( $interface ) unless $absentminded;
#
# This might be a bridge
#