use Encode;
my $hostfw_conf_filename = "/etc/pve/local/host.fw";
-my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
+my $pvefw_conf_dir = "/etc/pve/firewall";
+my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
# dynamically include PVE::QemuServer and PVE::OpenVZ
# to avoid dependency problems
$have_pve_manager = 1;
};
+my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+
+my $max_alias_name_length = 64;
+my $max_ipset_name_length = 64;
+my $max_group_name_length = 20;
+
PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
sub pve_verify_ipv4_or_cidr {
my ($cidr, $noerr) = @_;
die "value does not look like a valid IP address or CIDR network\n";
}
+PVE::JSONSchema::register_format('IPv4orCIDRorAlias', \&pve_verify_ipv4_or_cidr_or_alias);
+sub pve_verify_ipv4_or_cidr_or_alias {
+ my ($cidr, $noerr) = @_;
+
+ return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
+
+ if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
+ return $cidr if Net::IP->new($cidr);
+ return undef if $noerr;
+ die Net::IP::Error() . "\n";
+ }
+ return undef if $noerr;
+ die "value does not look like a valid IP address or CIDR network\n";
+}
+
PVE::JSONSchema::register_standard_option('ipset-name', {
description => "IP set name.",
type => 'string',
- pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
+ pattern => $ipset_name_pattern,
minLength => 2,
- maxLength => 20,
+ maxLength => $max_ipset_name_length,
});
PVE::JSONSchema::register_standard_option('pve-fw-alias', {
description => "Alias name.",
type => 'string',
- pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
+ pattern => $ip_alias_pattern,
minLength => 2,
- maxLength => 20,
+ maxLength => $max_alias_name_length,
});
PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
optional => 1,
});
-my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
-my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
-
PVE::JSONSchema::register_standard_option('pve-security-group-name', {
description => "Security Group name.",
type => 'string',
pattern => $security_group_name_pattern,
minLength => 2,
- maxLength => 20,
+ maxLength => $max_group_name_length,
});
my $feature_ipset_nomatch = 0;
my $pve_fw_macro_descr;
my $pve_fw_preferred_macro_names = {};
-my $pve_std_chains = {
+my $pve_std_chains = {};
+$pve_std_chains->{4} = {
'PVEFW-SET-ACCEPT-MARK' => [
"-j MARK --set-mark 1",
],
return $__local_network;
}
+# ipset names are limited to 31 characters, and we use '_swap'
+# suffix for atomic update, for example PVEFW-${VMID}-${ipset_name}_swap
+
+my $max_iptables_ipset_name_length = 31 - length("_swap");
+
+sub compute_ipset_chain_name {
+ my ($vmid, $ipset_name) = @_;
+
+ $vmid = 0 if !defined($vmid);
+
+ my $id = "$vmid-${ipset_name}";
+
+
+ if ((length($id) + 6) > $max_iptables_ipset_name_length) {
+ $id = PVE::Tools::fnv31a_hex($id);
+ }
+
+ return "PVEFW-$id";
+}
+
+sub compute_ipfilter_ipset_name {
+ my ($iface) = @_;
+
+ return "ipfilter-$iface";
+}
+
sub parse_address_list {
my ($str) = @_;
- return if $str =~ m/^(\+)(\S+)$/; # ipset ref
- return if $str =~ m/^${ip_alias_pattern}$/;
+ if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
+ die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
+ return;
+ }
+
+ if ($str =~ m/^${ip_alias_pattern}$/) {
+ die "alias name too long\n" if length($str) > $max_alias_name_length;
+ return;
+ }
my $count = 0;
my $iprange = 0;
+ my $ipversion = undef;
+
foreach my $elem (split(/,/, $str)) {
$count++;
if (!Net::IP->new($elem)) {
die "invalid IP address: $err\n";
}
$iprange = 1 if $elem =~ m/-/;
+ $ipversion = Net::IP::ip_get_version($elem); #fixme : don't work with range
}
die "you can use a range in a list\n" if $iprange && $count > 1;
+ return $ipversion;
}
sub parse_port_name_number_or_range {
return $portstr;
}
-PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
-sub pve_fw_verify_v4addr_spec {
+PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
+sub pve_fw_verify_addr_spec {
my ($list) = @_;
parse_address_list($list);
},
iface => get_standard_option('pve-iface', { optional => 1 }),
source => {
- type => 'string', format => 'pve-fw-v4addr-spec',
+ type => 'string', format => 'pve-fw-addr-spec',
optional => 1,
},
dest => {
- type => 'string', format => 'pve-fw-v4addr-spec',
+ type => 'string', format => 'pve-fw-addr-spec',
optional => 1,
},
proto => {
my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
my $allow_groups = $rule_env eq 'group' ? 0 : 1;
+ my $ipversion = undef;
my $allow_iface = $rule_env_iface_lookup->{$rule_env};
die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
if (my $value = $rule->{$name}) {
if ($value =~ m/^\+/) {
- if ($value =~ m/^\+(${security_group_name_pattern})$/) {
+ if ($value =~ m/^\+(${ipset_name_pattern})$/) {
&$add_error($name, "no such ipset '$1'")
if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
} else {
- &$add_error($name, "invalid security group name '$value'");
+ &$add_error($name, "invalid ipset name '$value'");
}
} elsif ($value =~ m/^${ip_alias_pattern}$/){
my $alias = lc($value);
}
if ($rule->{source}) {
- eval { parse_address_list($rule->{source}); };
+ eval { $ipversion = parse_address_list($rule->{source}); };
&$add_error('source', $@) if $@;
&$check_ipset_or_alias_property('source');
}
if ($rule->{dest}) {
- eval { parse_address_list($rule->{dest}); };
+ eval { $ipversion = parse_address_list($rule->{dest}); };
&$add_error('dest', $@) if $@;
&$check_ipset_or_alias_property('dest');
}
}
$rule->{errors} = $errors if $error_count;
+ $rule->{ipversion} = $ipversion if $ipversion;
return $rule;
}
return $rule;
}
+sub rules_modify_permissions {
+ my ($rule_env) = @_;
+
+ if ($rule_env eq 'host') {
+ return {
+ check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
+ };
+ } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
+ return {
+ check => ['perm', '/', [ 'Sys.Modify' ]],
+ };
+ } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
+ return {
+ check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
+ }
+ }
+
+ return undef;
+}
+
+sub rules_audit_permissions {
+ my ($rule_env) = @_;
+
+ if ($rule_env eq 'host') {
+ return {
+ check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
+ };
+ } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
+ return {
+ check => ['perm', '/', [ 'Sys.Audit' ]],
+ };
+ } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
+ return {
+ check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
+ }
+ }
+
+ return undef;
+}
+
# core functions
my $bridge_firewall_enabled = 0;
if ($source) {
if ($source =~ m/^\+/) {
- if ($source =~ m/^\+(${security_group_name_pattern})$/) {
+ if ($source =~ m/^\+(${ipset_name_pattern})$/) {
my $name = $1;
if ($fw_conf && $fw_conf->{ipset}->{$name}) {
- die "implement me";
+ my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
+ push @cmd, "-m set --match-set ${ipset_chain} src";
} elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
- push @cmd, "-m set --match-set PVEFW-$1 src";
+ my $ipset_chain = compute_ipset_chain_name(0, $name);
+ push @cmd, "-m set --match-set ${ipset_chain} src";
} else {
die "no such ipset '$name'\n";
}
if ($dest) {
if ($dest =~ m/^\+/) {
- if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
+ if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
my $name = $1;
if ($fw_conf && $fw_conf->{ipset}->{$name}) {
- die "implement me";
+ my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
+ push @cmd, "-m set --match-set ${ipset_chain} dst";
} elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
- push @cmd, "-m set --match-set PVEFW-$1 dst";
+ my $ipset_chain = compute_ipset_chain_name(0, $name);
+ push @cmd, "-m set --match-set ${ipset_chain} dst";
} else {
die "no such ipset '$name'\n";
}
ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
}
- ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j PVEFW-blacklist");
+ my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
+ ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
}
if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
}
sub ruleset_create_vm_chain {
- my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
+ my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
ruleset_create_chain($ruleset, $chain);
my $accept = generate_nfqueue($options);
if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
}
+ if ($ipfilter_ipset) {
+ ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
+ }
ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
}
}
my $chain = "venet0-$vmid-$direction";
- ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
+ ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
my $tapchain = "$iface-$direction";
- ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
+ my $ipfilter_name = compute_ipfilter_ipset_name($netid);
+ my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
+ if $vmfw_conf->{ipset}->{$ipfilter_name};
- ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
+ # create chain with mac and ip filter
+ ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
- ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
+ if ($options->{enable}) {
+ ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
- # implement policy
- my $policy;
+ ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
- if ($direction eq 'OUT') {
- $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
- } else {
+ # implement policy
+ my $policy;
+
+ if ($direction eq 'OUT') {
+ $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
+ } else {
$policy = $options->{policy_in} || 'DROP'; # allow nothing by default
- }
+ }
- my $accept = generate_nfqueue($options);
- my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
- ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
+ my $accept = generate_nfqueue($options);
+ my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
+ ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
+ } else {
+ my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
+ ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
+ }
# plug the tap chain to bridge chain
if ($direction eq 'IN') {
}
# allow standard traffic for management ipset (includes cluster network)
- my $mngmntsrc = "-m set --match-set PVEFW-management src";
+ my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
+ my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action"); # PVE API
ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
sub parse_fw_rule {
my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
- chomp $line;
-
my $orig_line = $line;
my $rule = {};
$opt = lc($1);
$value = $2;
} else {
- chomp $line;
die "can't parse option '$line'\n"
}
$opt = lc($1);
$value = int($2);
} else {
- chomp $line;
die "can't parse option '$line'\n"
}
$opt = lc($1);
$value = uc($3);
} else {
- chomp $line;
die "can't parse option '$line'\n"
}
return ($opt, $value);
}
+sub resolve_alias {
+ my ($clusterfw_conf, $fw_conf, $cidr) = @_;
+
+ if ($cidr !~ m/^\d/) {
+ my $alias = lc($cidr);
+ my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
+ $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
+ return $e->{cidr} if $e;
+
+ die "no such alias '$cidr'\n";
+ }
+
+ return $cidr;
+}
+
sub parse_alias {
my ($line) = @_;
return undef;
}
-sub parse_vm_fw_rules {
- my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
-
- my $res = {
- rules => [],
- options => {},
- aliases => {},
- };
-
- my $section;
-
- while (defined(my $line = <$fh>)) {
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
-
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
-
- if ($line =~ m/^\[(\S+)\]\s*$/i) {
- $section = lc($1);
- warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
- next;
- }
- if (!$section) {
- warn "$prefix: skip line - no section";
- next;
- }
-
- next if !$res->{$section}; # skip undefined section
-
- if ($section eq 'options') {
- eval {
- my ($opt, $value) = parse_vmfw_option($line);
- $res->{options}->{$opt} = $value;
- };
- warn "$prefix: $@" if $@;
- next;
- }
-
- if ($section eq 'aliases') {
- eval {
- my $data = parse_alias($line);
- $res->{aliases}->{lc($data->{name})} = $data;
- };
- warn "$prefix: $@" if $@;
- next;
- }
-
- my $rule;
- eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
- }
-
- push @{$res->{$section}}, $rule;
- }
-
- return $res;
-}
-
-sub parse_host_fw_rules {
- my ($filename, $fh, $cluster_conf, $verbose) = @_;
-
- my $res = { rules => [], options => {}};
-
- my $section;
-
- while (defined(my $line = <$fh>)) {
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
-
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
-
- if ($line =~ m/^\[(\S+)\]\s*$/i) {
- $section = lc($1);
- warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
- next;
- }
- if (!$section) {
- warn "$prefix: skip line - no section";
- next;
- }
-
- next if !$res->{$section}; # skip undefined section
-
- if ($section eq 'options') {
- eval {
- my ($opt, $value) = parse_hostfw_option($line);
- $res->{options}->{$opt} = $value;
- };
- warn "$prefix: $@" if $@;
- next;
- }
-
- my $rule;
- eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, 'host', $verbose); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
- }
-
- push @{$res->{$section}}, $rule;
- }
-
- return $res;
-}
-
-sub parse_cluster_fw_rules {
- my ($filename, $fh, $verbose) = @_;
+sub generic_fw_config_parser {
+ my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
my $section;
my $group;
- my $res = {
- rules => [],
- options => {},
- aliases => {},
- groups => {},
- group_comments => {},
- ipset => {} ,
- ipset_comments => {},
- };
+ my $res = $empty_conf;
while (defined(my $line = <$fh>)) {
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
+ chomp $line;
+
my $linenr = $fh->input_line_number();
my $prefix = "$filename (line $linenr)";
- if ($line =~ m/^\[options\]$/i) {
+ if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
$section = 'options';
next;
}
- if ($line =~ m/^\[aliases\]$/i) {
+ if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
$section = 'aliases';
next;
}
- if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
+ if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
$section = 'groups';
$group = lc($1);
my $comment = $2;
+ eval {
+ die "security group name too long\n" if length($group) > $max_group_name_length;
+ die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
+ };
+ if (my $err = $@) {
+ ($section, $group, $comment) = undef;
+ warn "$prefix: $err";
+ next;
+ }
+
$res->{$section}->{$group} = [];
$res->{group_comments}->{$group} = decode('utf8', $comment)
if $comment;
next;
}
- if ($line =~ m/^\[rules\]$/i) {
+ if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
$section = 'rules';
next;
}
- if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
+ if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
$section = 'ipset';
$group = lc($1);
my $comment = $2;
+ eval {
+ die "ipset name too long\n" if length($group) > $max_ipset_name_length;
+ die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
+ };
+ if (my $err = $@) {
+ ($section, $group, $comment) = undef;
+ warn "$prefix: $err";
+ next;
+ }
+
$res->{$section}->{$group} = [];
$res->{ipset_comments}->{$group} = decode('utf8', $comment)
if $comment;
if ($section eq 'options') {
eval {
- my ($opt, $value) = parse_clusterfw_option($line);
+ my ($opt, $value);
+ if ($rule_env eq 'cluster') {
+ ($opt, $value) = parse_clusterfw_option($line);
+ } elsif ($rule_env eq 'host') {
+ ($opt, $value) = parse_hostfw_option($line);
+ } else {
+ ($opt, $value) = parse_vmfw_option($line);
+ }
$res->{options}->{$opt} = $value;
};
warn "$prefix: $@" if $@;
warn "$prefix: $@" if $@;
} elsif ($section eq 'rules') {
my $rule;
- eval { $rule = parse_fw_rule($prefix, $line, $res, undef, 'cluster', $verbose); };
+ eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
if (my $err = $@) {
warn "$prefix: $err";
next;
push @{$res->{$section}}, $rule;
} elsif ($section eq 'groups') {
my $rule;
- eval { $rule = parse_fw_rule($prefix, $line, $res, undef, 'group', $verbose); };
+ eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
if (my $err = $@) {
warn "$prefix: $err";
next;
$line =~ m/^(\!)?\s*(\S+)\s*$/;
my $nomatch = $1;
my $cidr = $2;
+ my $errors;
- if($cidr !~ m/^${ip_alias_pattern}$/) {
- $cidr =~ s|/32$||;
+ if ($nomatch && !$feature_ipset_nomatch) {
+ $errors->{nomatch} = "nomatch not supported by kernel";
+ }
- eval { pve_verify_ipv4_or_cidr($cidr); };
- if (my $err = $@) {
- warn "$prefix: $cidr - $err";
- next;
+ eval {
+ if ($cidr =~ m/^${ip_alias_pattern}$/) {
+ resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
+ } else {
+ $cidr =~ s|/32$||;
+ pve_verify_ipv4_or_cidr_or_alias($cidr);
}
+ };
+ if (my $err = $@) {
+ chomp $err;
+ $errors->{cidr} = $err;
}
my $entry = { cidr => $cidr };
$entry->{nomatch} = 1 if $nomatch;
$entry->{comment} = $comment if $comment;
+ $entry->{errors} = $errors if $errors;
+
+ if ($verbose && $errors) {
+ warn "$prefix - errors in ipset '$group': $line\n";
+ foreach my $p (keys %{$errors}) {
+ warn " $p: $errors->{$p}\n";
+ }
+ }
push @{$res->{$section}->{$group}}, $entry;
+ } else {
+ warn "$prefix: skip line - unknown section\n";
+ next;
}
}
return $res;
}
+sub parse_hostfw_config {
+ my ($filename, $fh, $cluster_conf, $verbose) = @_;
+
+ my $empty_conf = { rules => [], options => {}};
+
+ return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
+}
+
+sub parse_vmfw_config {
+ my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
+
+ my $empty_conf = {
+ rules => [],
+ options => {},
+ aliases => {},
+ ipset => {} ,
+ ipset_comments => {},
+ };
+
+ return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
+}
+
+sub parse_clusterfw_config {
+ my ($filename, $fh, $verbose) = @_;
+
+ my $section;
+ my $group;
+
+ my $empty_conf = {
+ rules => [],
+ options => {},
+ aliases => {},
+ groups => {},
+ group_comments => {},
+ ipset => {} ,
+ ipset_comments => {},
+ };
+
+ return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
+}
+
sub run_locked {
my ($code, @param) = @_;
my $vmfw_conf = {};
- $dir = "/etc/pve/firewall" if !defined($dir);
+ $dir = $pvefw_conf_dir if !defined($dir);
my $filename = "$dir/$vmid.fw";
if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
+ $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
+ $vmfw_conf->{vmid} = $vmid;
}
return $vmfw_conf;
return $raw;
};
-my $format_ipset = sub {
- my ($options) = @_;
-
+my $format_ipsets = sub {
+ my ($fw_conf) = @_;
+
my $raw = '';
- my $nethash = {};
- foreach my $entry (@$options) {
- $nethash->{$entry->{cidr}} = $entry;
- }
+ foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
+ if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
+ my $utf8comment = encode('utf8', $comment);
+ $raw .= "[IPSET $ipset] # $utf8comment\n\n";
+ } else {
+ $raw .= "[IPSET $ipset]\n\n";
+ }
+ my $options = $fw_conf->{ipset}->{$ipset};
- foreach my $cidr (sort keys %$nethash) {
- my $entry = $nethash->{$cidr};
- my $line = $entry->{nomatch} ? '!' : '';
- $line .= $entry->{cidr};
- $line .= " # " . encode('utf8', $entry->{comment})
- if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
- $raw .= "$line\n";
+ my $nethash = {};
+ foreach my $entry (@$options) {
+ $nethash->{$entry->{cidr}} = $entry;
+ }
+
+ foreach my $cidr (sort keys %$nethash) {
+ my $entry = $nethash->{$cidr};
+ my $line = $entry->{nomatch} ? '!' : '';
+ $line .= $entry->{cidr};
+ $line .= " # " . encode('utf8', $entry->{comment})
+ if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
+ $raw .= "$line\n";
+ }
+
+ $raw .= "\n";
}
return $raw;
my $raw = '';
my $options = $vmfw_conf->{options};
- $raw .= &$format_options($options) if scalar(keys %$options);
+ $raw .= &$format_options($options) if $options && scalar(keys %$options);
my $aliases = $vmfw_conf->{aliases};
- $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
+ $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
+
+ $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
my $rules = $vmfw_conf->{rules} || [];
- if (scalar(@$rules)) {
+ if ($rules && scalar(@$rules)) {
$raw .= "[RULES]\n\n";
$raw .= &$format_rules($rules, 1);
$raw .= "\n";
}
- my $filename = "/etc/pve/firewall/$vmid.fw";
+ mkdir $pvefw_conf_dir;
+
+ my $filename = "$pvefw_conf_dir/$vmid.fw";
PVE::Tools::file_set_contents($filename, $raw);
}
}
sub generate_std_chains {
- my ($ruleset, $options) = @_;
+ my ($ruleset, $options, $ipversion) = @_;
+
+ my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
my $loglevel = get_option_log_level($options, 'smurf_log_level');
- # same as shorewall smurflog.
- my $chain = 'PVEFW-smurflog';
- $pve_std_chains->{$chain} = [];
+ my $chain;
- push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
- push @{$pve_std_chains->{$chain}}, "-j DROP";
+ if ($ipversion == 4) {
+ # same as shorewall smurflog.
+ $chain = 'PVEFW-smurflog';
+ $std_chains->{$chain} = [];
+
+ push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+ push @{$std_chains->{$chain}}, "-j DROP";
+ }
# same as shorewall logflags action.
$loglevel = get_option_log_level($options, 'tcp_flags_log_level');
$chain = 'PVEFW-logflags';
- $pve_std_chains->{$chain} = [];
+ $std_chains->{$chain} = [];
# fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
- push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
- push @{$pve_std_chains->{$chain}}, "-j DROP";
+ push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+ push @{$std_chains->{$chain}}, "-j DROP";
- foreach my $chain (keys %$pve_std_chains) {
+ foreach my $chain (keys %$std_chains) {
ruleset_create_chain($ruleset, $chain);
- foreach my $rule (@{$pve_std_chains->{$chain}}) {
+ foreach my $rule (@{$std_chains->{$chain}}) {
if (ref($rule)) {
ruleset_generate_rule($ruleset, $chain, $rule);
} else {
}
sub generate_ipset_chains {
- my ($ipset_ruleset, $fw_conf) = @_;
+ my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
foreach my $ipset (keys %{$fw_conf->{ipset}}) {
- generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
+ my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
+ generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
}
}
sub generate_ipset {
- my ($ipset_ruleset, $name, $options, $aliases) = @_;
+ my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
+
+ die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
my $hashsize = scalar(@$options);
if ($hashsize <= 64) {
$hashsize = round_powerof2($hashsize);
}
- push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
+ $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
# remove duplicates
my $nethash = {};
foreach my $entry (@$options) {
- my $cidr = $entry->{cidr};
- if ($cidr =~ m/^${ip_alias_pattern}$/) {
- my $alias = lc($cidr);
- if ($aliases->{$alias}) {
- $entry->{cidr} = $aliases->{$alias}->{cidr};
- $nethash->{$entry->{cidr}} = $entry;
- } else {
- warn "no such alias '$cidr'\n" if !$aliases->{$alias};
- }
- } else {
- $nethash->{$entry->{cidr}} = $entry;
- }
+ next if $entry->{errors}; # skip entries with errors
+ eval {
+ my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
+ $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
+ };
+ warn $@ if $@;
}
foreach my $cidr (sort keys %$nethash) {
my $cluster_conf = {};
if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
+ $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
}
return $cluster_conf;
my $raw = '';
my $options = $cluster_conf->{options};
- $raw .= &$format_options($options) if scalar(keys %$options);
+ $raw .= &$format_options($options) if $options && scalar(keys %$options);
my $aliases = $cluster_conf->{aliases};
- $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
-
- foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
- if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
- my $utf8comment = encode('utf8', $comment);
- $raw .= "[IPSET $ipset] # $utf8comment\n\n";
- } else {
- $raw .= "[IPSET $ipset]\n\n";
- }
- my $options = $cluster_conf->{ipset}->{$ipset};
- $raw .= &$format_ipset($options);
- $raw .= "\n";
- }
+ $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
+ $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
+
my $rules = $cluster_conf->{rules};
- if (scalar(@$rules)) {
+ if ($rules && scalar(@$rules)) {
$raw .= "[RULES]\n\n";
$raw .= &$format_rules($rules, 1);
$raw .= "\n";
}
- foreach my $group (sort keys %{$cluster_conf->{groups}}) {
- my $rules = $cluster_conf->{groups}->{$group};
- if (my $comment = $cluster_conf->{group_comments}->{$group}) {
- my $utf8comment = encode('utf8', $comment);
- $raw .= "[group $group] # $utf8comment\n\n";
- } else {
- $raw .= "[group $group]\n\n";
- }
+ if ($cluster_conf->{groups}) {
+ foreach my $group (sort keys %{$cluster_conf->{groups}}) {
+ my $rules = $cluster_conf->{groups}->{$group};
+ if (my $comment = $cluster_conf->{group_comments}->{$group}) {
+ my $utf8comment = encode('utf8', $comment);
+ $raw .= "[group $group] # $utf8comment\n\n";
+ } else {
+ $raw .= "[group $group]\n\n";
+ }
- $raw .= &$format_rules($rules, 0);
- $raw .= "\n";
+ $raw .= &$format_rules($rules, 0);
+ $raw .= "\n";
+ }
}
+ mkdir $pvefw_conf_dir;
PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
}
my $hostfw_conf = {};
if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
+ $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
}
return $hostfw_conf;
}
my $raw = '';
my $options = $hostfw_conf->{options};
- $raw .= &$format_options($options) if scalar(keys %$options);
+ $raw .= &$format_options($options) if $options && scalar(keys %$options);
my $rules = $hostfw_conf->{rules};
- if (scalar(@$rules)) {
+ if ($rules && scalar(@$rules)) {
$raw .= "[RULES]\n\n";
$raw .= &$format_rules($rules, 1);
$raw .= "\n";
$vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
}
+ my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
+ return ($ruleset, $ipset_ruleset);
+}
+
+sub compile_iptables_filter {
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
+
$cluster_conf->{ipset}->{venet0} = [];
+ my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
my $localnet;
if ($cluster_conf->{aliases}->{local_network}) {
push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
+ return ({}, {}) if !$cluster_conf->{options}->{enable};
+
my $ruleset = {};
ruleset_create_chain($ruleset, "PVEFW-INPUT");
ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
+
ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
- ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
+ ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
- generate_std_chains($ruleset, $hostfw_options);
+ generate_std_chains($ruleset, $hostfw_options, $ipversion);
my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
+ my $ipset_ruleset = {};
+
if ($hostfw_enable) {
eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
warn $@ if $@; # just to be sure - should not happen
}
- ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
+ ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
# generate firewall rules for QEMU VMs
foreach my $vmid (keys %{$vmdata->{qemu}}) {
my $conf = $vmdata->{qemu}->{$vmid};
my $vmfw_conf = $vmfw_configs->{$vmid};
return if !$vmfw_conf;
- return if !$vmfw_conf->{options}->{enable};
+
+ generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
foreach my $netid (keys %$conf) {
next if $netid !~ m/^net(\d+)$/;
my $vmfw_conf = $vmfw_configs->{$vmid};
return if !$vmfw_conf;
- return if !$vmfw_conf->{options}->{enable};
- if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
- my $ip = $conf->{ip_address}->{value};
- $ip =~ s/\s+/,/g;
- parse_address_list($ip); # make sure we have a valid $ip list
+ generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
- my @ips = split(',', $ip);
+ if ($vmfw_conf->{options}->{enable}) {
+ if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
+ my $ip = $conf->{ip_address}->{value};
+ $ip =~ s/\s+/,/g;
+ parse_address_list($ip); # make sure we have a valid $ip list
- foreach my $singleip (@ips) {
- my $venet0ipset = {};
- $venet0ipset->{cidr} = $singleip;
- push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
- }
+ my @ips = split(',', $ip);
+
+ foreach my $singleip (@ips) {
+ my $venet0ipset = {};
+ $venet0ipset->{cidr} = $singleip;
+ push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
+ }
- generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
- generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
+ generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
+ generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
+ }
}
if ($conf->{netif} && $conf->{netif}->{value}) {
my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
foreach my $netid (keys %$netif) {
my $d = $netif->{$netid};
-
+ my $bridge = $d->{bridge};
+ next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
my $macaddr = $d->{mac};
my $iface = $d->{host_ifname};
generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
}
- my $ipset_ruleset = {};
- generate_ipset_chains($ipset_ruleset, $cluster_conf);
+ generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
return ($ruleset, $ipset_ruleset);
}
}
foreach my $h (qw(INPUT OUTPUT FORWARD)) {
- if (!$hooks->{$h}) {
- $cmdlist .= "-A $h -j PVEFW-$h\n";
+ my $chain = "PVEFW-$h";
+ if ($ruleset->{$chain} && !$hooks->{$h}) {
+ $cmdlist .= "-A $h -j $chain\n";
}
}
$cmdlist .= "COMMIT\n";
iptables_restore_cmdlist($cmdlist);
+
+ my $ipset_chains = ipset_get_chains();
+
+ $cmdlist = "";
+
+ foreach my $chain (keys %$ipset_chains) {
+ $cmdlist .= "flush $chain\n";
+ $cmdlist .= "destroy $chain\n";
+ }
+
+ ipset_restore_cmdlist($cmdlist) if $cmdlist;
}
sub init {
my $cluster_conf = load_clusterfw_conf();
my $cluster_options = $cluster_conf->{options};
- my $enable = $cluster_options->{enable};
-
- die "Firewall is disabled - cannot start\n" if !$enable;
-
- if (!$enable) {
+ if (!$cluster_options->{enable}) {
PVE::Firewall::remove_pvefw_chains();
return;
}
projects / pve-firewall.git / blobdiff