my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
my $default_log_level = 'nolog'; # avoid logs by default
+my $global_log_ratelimit = '--limit 1/sec';
my $log_level_hash = {
debug => 7,
emerg => 0,
};
+my $verbose = 0;
+sub set_verbose {
+ $verbose = shift;
+}
+
# %rule
#
# name => optional
],
'Razor' => [
"Razor Antispam System",
- { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
+ { action => 'PARAM', proto => 'tcp', dport => '2703' },
],
'Rdate' => [
"Remote time retrieval (rdate)",
my @elements = split(/,/, $str);
die "extraneous commas in list\n" if $str ne join(',', @elements);
foreach my $item (@elements) {
- if ($item =~ m/^(\d+):(\d+)$/) {
+ if ($item =~ m/^([0-9]+):([0-9]+)$/) {
$count += 2;
my ($port1, $port2) = ($1, $2);
die "invalid port '$port1'\n" if $port1 > 65535;
die "invalid port '$port2'\n" if $port2 > 65535;
- } elsif ($item =~ m/^(\d+)$/) {
+ die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
+ } elsif ($item =~ m/^([0-9]+)$/) {
$count += 1;
my $port = $1;
die "invalid port '$port'\n" if $port > 65535;
minimum => 0,
optional => 1,
},
+ ebtables => {
+ description => "Enable ebtables rules cluster wide.",
+ type => 'boolean',
+ default => 1,
+ optional => 1,
+ },
policy_in => {
description => "Input policy.",
type => 'string',
optional => 1,
enum => ['ACCEPT', 'REJECT', 'DROP'],
},
+ log_ratelimit => {
+ description => "Log ratelimiting settings",
+ type => 'string', format => {
+ enable => {
+ default_key => 1,
+ description => 'Enable or disable log rate limiting',
+ type => 'boolean',
+ default => '1',
+ },
+ rate => {
+ type => 'string',
+ description => 'Frequency with which the burst bucket gets refilled',
+ optional => 1,
+ pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
+ format_description => 'rate',
+ default => '1/second',
+ },
+ burst => {
+ type => 'integer',
+ minimum => 0,
+ optional => 1,
+ description => 'Inital burst of packages which will get logged',
+ default => 5,
+ },
+ },
+ optional => 1,
+ },
};
our $host_option_properties = {
type => 'boolean',
optional => 1,
},
+ nf_conntrack_allow_invalid => {
+ description => "Allow invalid packets on connection tracking.",
+ type => 'boolean',
+ default => 0,
+ optional => 1,
+ },
+ log_nf_conntrack => {
+ description => "Enable logging of conntrack information.",
+ type => 'boolean',
+ default => 0,
+ optional => 1
+ },
};
our $vm_option_properties = {
minimum => 0,
optional => 1,
},
+ log => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for firewall rule.",
+ }),
sport => {
description => "Restrict TCP/UDP source port. $port_descr",
type => 'string', format => 'pve-fw-sport-spec',
run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
}
+sub ebtables_restore_cmdlist {
+ my ($cmdlist) = @_;
+
+ run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
+}
+
sub iptables_get_chains {
my ($iptablescmd) = @_;
return $res;
}
+sub ebtables_get_chains {
+
+ my $res = {};
+ my $chains = {};
+ my $parser = sub {
+ my $line = shift;
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
+ if ($line =~ m/^:(\S+)\s\S+$/) {
+ # Make sure we know chains exist even if they're empty.
+ $chains->{$1} //= [];
+ } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } else {
+ # simply ignore the rest
+ return;
+ }
+ };
+
+ run_command("/sbin/ebtables-save", outfunc => $parser);
+ # compute digest for each chain and store rules as well
+ foreach my $chain (keys %$chains) {
+ $res->{$chain}->{rules} = $chains->{$chain};
+ $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
+ }
+ return $res;
+}
+
# substitude action of rule according to action hash
sub rule_substitude_action {
my ($rule, $actions) = @_;
}
my @iptcmds;
- if (defined $rule->{log} && $rule->{log}) {
- my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
+ my $log = $rule->{log};
+ if (defined($log) && $log ne 'nolog') {
+ my $loglevel = $log_level_hash->{$log};
+ my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
push @iptcmds, "-A $chain $matchstr $logaction";
}
push @iptcmds, "-A $chain $matchstr $targetstr";
}
sub ruleset_generate_rule {
- my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
+ my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
my $rules;
# update all or nothing
my @ipt_rule_cmds;
foreach my $r (@$rules) {
- push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
+ push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
}
foreach my $c (@ipt_rule_cmds) {
ruleset_add_ipt_cmd($ruleset, $chain, $c);
}
sub ruleset_addrule {
- my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
+ my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
- die "no such chain '$chain'\n" if !$ruleset->{$chain};
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
- if (defined($log) && $log) {
- my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
+ if ($log) {
+ my $loglevel = $log_level_hash->{$log};
+ my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
- }
- push @{$ruleset->{$chain}}, "-A $chain $match $action";
+ }
+ # for stable ebtables digests avoid double-spaces to match ebtables-save output
+ $match .= ' ' if length($match);
+ push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
}
sub ruleset_insertrule {
$vmid = 0 if !defined($vmid);
$msg = "" if !defined($msg);
+ my $rlimit = '';
+ if (defined($global_log_ratelimit)) {
+ $rlimit = "-m limit $global_log_ratelimit ";
+ }
+
# Note: we use special format for prefix to pass further
# info to log daemon (VMID, LOGLEVEL and CHAIN)
-
- return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
+ return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
}
sub ruleset_add_chain_policy {
} elsif ($policy eq 'REJECT') {
ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
- ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
+ ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
} else {
# should not happen
die "internal error: unknown policy '$policy'";
}
sub ruleset_chain_add_conn_filters {
- my ($ruleset, $chain, $accept) = @_;
+ my ($ruleset, $chain, $allow_invalid, $accept) = @_;
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
+ if (!$allow_invalid) {
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
+ }
ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
}
if ($cluster_conf->{ipset}->{blacklist}){
if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
ruleset_create_chain($ruleset, "PVEFW-blacklist");
- ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
+ ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
}
my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
}
sub ruleset_generate_vm_rules {
- my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
+ my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
my $lc_direction = lc($direction);
} else {
next if $rule->{type} ne $lc_direction;
eval {
+ $rule->{logmsg} = "$rule->{action}: ";
if ($direction eq 'OUT') {
rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
} else {
rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
}
};
warn $@ if $@;
ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
if ($options->{enable}) {
- ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
+ ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
if ($direction eq 'OUT') {
$policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
} else {
- $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
+ $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
}
my $accept = generate_nfqueue($options);
# plug the tap chain to bridge chain
if ($direction eq 'IN') {
ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
- "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
+ "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
} else {
ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
- "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
+ "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain", $loglevel, 'FWBR-OUT: ', $vmid);
}
}
ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
- ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
+ ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
} elsif ($rule->{type} eq 'in') {
rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
}
};
warn $@ if $@;
ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
- ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
+ ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
# we use RETURN because we may want to check other thigs later
$accept_action = 'RETURN';
$rule->{iface_out} = $rule->{iface} if $rule->{iface};
eval {
+ $rule->{logmsg} = "$rule->{action}: ";
if ($rule->{type} eq 'group') {
ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
} elsif ($rule->{type} eq 'out') {
rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
}
};
warn $@ if $@;
}
sub parse_fw_rule {
- my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
+ my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
my $orig_line = $line;
$rule->{dest} = $1;
next;
}
+ if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
+ $rule->{log} = $1;
+ next;
+ }
last;
}
my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
- if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
+ if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
$opt = lc($1);
$value = int($2);
} elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
if (($value > 1) && ((time() - $value) > 60)) {
$value = 0
}
+ } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
} elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
$opt = lc($1);
$value = uc($3);
+ } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
+ $opt = lc($1);
+ $value = $2;
} else {
die "can't parse option '$line'\n"
}
}
sub generic_fw_config_parser {
- my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
+ my ($filename, $fh, $cluster_conf, $empty_conf, $rule_env) = @_;
my $section;
my $group;
warn "$prefix: $@" if $@;
} elsif ($section eq 'rules') {
my $rule;
- eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
+ eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
if (my $err = $@) {
warn "$prefix: $err";
next;
push @{$res->{$section}}, $rule;
} elsif ($section eq 'groups') {
my $rule;
- eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
+ eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
if (my $err = $@) {
warn "$prefix: $err";
next;
}
sub parse_hostfw_config {
- my ($filename, $fh, $cluster_conf, $verbose) = @_;
+ my ($filename, $fh, $cluster_conf) = @_;
my $empty_conf = { rules => [], options => {}};
- return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
+ return generic_fw_config_parser($filename, $fh, $cluster_conf, $empty_conf, 'host');
}
sub parse_vmfw_config {
- my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
+ my ($filename, $fh, $cluster_conf, $rule_env) = @_;
my $empty_conf = {
rules => [],
ipset_comments => {},
};
- return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
+ return generic_fw_config_parser($filename, $fh, $cluster_conf, $empty_conf, $rule_env);
}
sub parse_clusterfw_config {
- my ($filename, $fh, $verbose) = @_;
+ my ($filename, $fh) = @_;
my $section;
my $group;
ipset_comments => {},
};
- return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
+ return generic_fw_config_parser($filename, $fh, $empty_conf, $empty_conf, 'cluster');
}
sub run_locked {
};
sub load_vmfw_conf {
- my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
+ my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
my $vmfw_conf = {};
my $filename = "$dir/$vmid.fw";
if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
+ $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env);
$vmfw_conf->{vmid} = $vmid;
}
$raw .= " -p $rule->{proto}" if $rule->{proto};
$raw .= " -dport $rule->{dport}" if $rule->{dport};
$raw .= " -sport $rule->{sport}" if $rule->{sport};
+ $raw .= " -log $rule->{log}" if $rule->{log};
}
$raw .= " # " . encode('utf8', $rule->{comment})
}
sub read_vm_firewall_configs {
- my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
+ my ($cluster_conf, $vmdata, $dir) = @_;
my $vmfw_configs = {};
foreach my $vmid (keys %{$vmdata->{qemu}}) {
- my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
+ my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
next if !$vmfw_conf->{options}; # skip if file does not exists
$vmfw_configs->{$vmid} = $vmfw_conf;
}
foreach my $vmid (keys %{$vmdata->{lxc}}) {
- my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
+ my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
next if !$vmfw_conf->{options}; # skip if file does not exists
$vmfw_configs->{$vmid} = $vmfw_conf;
}
return undef if $v eq '' || $v eq 'nolog';
- $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
-
- return $v if ($v >= 0) && ($v <= 7);
+ return $v if defined($log_level_hash->{$v});
warn "unknown log level ($k = '$v')\n";
ruleset_create_chain($ruleset, $chain);
foreach my $rule (@{$std_chains->{$chain}}) {
if (ref($rule)) {
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
} else {
die "rule $rule as string - should not happen";
}
return ++$int;
}
+my $set_global_log_ratelimit = sub {
+ my $cluster_opts = shift;
+
+ $global_log_ratelimit = '--limit 1/sec';
+ if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
+ my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
+ my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
+
+ if ($limit->{enable}) {
+ if (my $rate = $limit->{rate}) {
+ $global_log_ratelimit = "--limit $rate";
+ }
+ if (my $burst = $limit->{burst}) {
+ $global_log_ratelimit .= " --limit-burst $burst";
+ }
+ } else {
+ $global_log_ratelimit = undef;
+ }
+ }
+};
+
sub load_clusterfw_conf {
- my ($filename, $verbose) = @_;
+ my ($filename) = @_;
$filename = $clusterfw_conf_filename if !defined($filename);
my $cluster_conf = {};
if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
+ $cluster_conf = parse_clusterfw_config($filename, $fh);
+
+ $set_global_log_ratelimit->($cluster_conf->{options});
}
return $cluster_conf;
}
sub load_hostfw_conf {
- my ($cluster_conf, $filename, $verbose) = @_;
+ my ($cluster_conf, $filename) = @_;
$filename = $hostfw_conf_filename if !defined($filename);
my $hostfw_conf = {};
if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
+ $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf);
}
return $hostfw_conf;
}
}
sub compile {
- my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
+ my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
my $vmfw_configs;
if ($vmdata) { # test mode
my $testdir = $vmdata->{testdir} || die "no test directory specified";
my $filename = "$testdir/cluster.fw";
- $cluster_conf = load_clusterfw_conf($filename, $verbose);
+ $cluster_conf = load_clusterfw_conf($filename);
$filename = "$testdir/host.fw";
- $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
+ $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
- $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
+ $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
} else { # normal operation
- $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
+ $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
- $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
+ $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
$vmdata = read_local_vm_config();
- $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
+ $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
}
- return ({},{},{}) if !$cluster_conf->{options}->{enable};
+ return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
my $localnet;
if ($cluster_conf->{aliases}->{local_network}) {
my $localnet_ver;
($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
- $cluster_conf->{aliases}->{local_network} = {
+ $cluster_conf->{aliases}->{local_network} = {
name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
}
push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
- my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
- my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
- my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
+ my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4);
+ my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6);
+ my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
}
sub compile_iptables_filter {
- my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion) = @_;
my $ruleset = {};
# fixme: what log level should we use here?
my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
- ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
+ my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
+ ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
}
sub compile_ebtables_filter {
- my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
- return ({}, {}) if !$cluster_conf->{options}->{enable};
+ if (!($cluster_conf->{options}->{ebtables} // 1)) {
+ return {};
+ }
my $ruleset = {};
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
-
ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
#for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
# generate firewall rules for QEMU VMs
- foreach my $vmid (keys %{$vmdata->{qemu}}) {
+ foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
eval {
my $conf = $vmdata->{qemu}->{$vmid};
my $vmfw_conf = $vmfw_configs->{$vmid};
return if !$vmfw_conf;
+ my $ipsets = $vmfw_conf->{ipset};
- foreach my $netid (keys %$conf) {
+ foreach my $netid (sort keys %$conf) {
next if $netid !~ m/^net(\d+)$/;
my $net = PVE::QemuServer::parse_net($conf->{$netid});
next if !$net->{firewall};
my $iface = "tap${vmid}i$1";
my $macaddr = $net->{macaddr};
-
- generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
-
+ my $arpfilter = [];
+ if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
+ foreach my $ipaddr (@$ipset) {
+ my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
+ next if !$ip || ($version && $version != 4);
+ push(@$arpfilter, $ip);
+ }
+ }
+ generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
}
};
warn $@ if $@; # just to be sure - should not happen
}
# generate firewall rules for LXC containers
- foreach my $vmid (keys %{$vmdata->{lxc}}) {
+ foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
eval {
my $conf = $vmdata->{lxc}->{$vmid};
my $vmfw_conf = $vmfw_configs->{$vmid};
return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
+ my $ipsets = $vmfw_conf->{ipset};
- foreach my $netid (keys %$conf) {
+ foreach my $netid (sort keys %$conf) {
next if $netid !~ m/^net(\d+)$/;
my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
next if !$net->{firewall};
my $iface = "veth${vmid}i$1";
my $macaddr = $net->{hwaddr};
- generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
+ my $arpfilter = [];
+ if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
+ foreach my $ipaddr (@$ipset) {
+ my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
+ next if !$ip || ($version && $version != 4);
+ push(@$arpfilter, $ip);
+ }
+ }
+ push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
+ generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
}
};
warn $@ if $@; # just to be sure - should not happen
}
sub generate_tap_layer2filter {
- my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
+ my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
my $options = $vmfw_conf->{options};
my $tapchain = $iface."-OUT";
ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
}
+ if (@$arpfilter){
+ my $arpchain = $tapchain."-ARP";
+ ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
+ ruleset_create_chain($ruleset, $arpchain);
+
+ foreach my $ip (@{$arpfilter}) {
+ ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
+ }
+ ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
+ }
+
if (defined($options->{layer2_protocols})){
+ my $protochain = $tapchain."-PROTO";
+ ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
+ ruleset_create_chain($ruleset, $protochain);
+
foreach my $proto (split(/,/, $options->{layer2_protocols})) {
- ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT');
+ ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
}
- ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
- } else {
- ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
+ ruleset_addrule($ruleset, $protochain, '', '-j DROP');
}
+ ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
+
ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
}
+# the parameter $change_only_regex changes two things if defined:
+# * all chains not matching it will be left intact
+# * both the $active_chains hash and the returned status_hash have different
+# structure (they contain a key named 'rules').
sub get_ruleset_status {
- my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
+ my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
my $statushash = {};
foreach my $chain (sort keys %$ruleset) {
- my $sig = &$digest_fn($ruleset->{$chain});
+ my $rules = $ruleset->{$chain};
+ my $sig = &$digest_fn($rules);
+ my $oldsig;
$statushash->{$chain}->{sig} = $sig;
-
- my $oldsig = $active_chains->{$chain};
+ if (defined($change_only_regex)) {
+ $oldsig = $active_chains->{$chain}->{sig};
+ $statushash->{$chain}->{rules} = $rules;
+ } else {
+ $oldsig = $active_chains->{$chain};
+ }
if (!defined($oldsig)) {
$statushash->{$chain}->{action} = 'create';
} else {
$statushash->{$chain}->{action} = 'update';
}
}
- print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
- foreach my $cmd (@{$ruleset->{$chain}}) {
- print "\t$cmd\n" if $verbose;
+ if ($verbose) {
+ print "$statushash->{$chain}->{action} $chain ($sig)\n";
+ foreach my $cmd (@{$rules}) {
+ print "\t$cmd\n";
+ }
}
}
foreach my $chain (sort keys %$active_chains) {
- if (!defined($ruleset->{$chain})) {
- my $sig = $active_chains->{$chain};
- $statushash->{$chain}->{action} = 'delete';
- $statushash->{$chain}->{sig} = $sig;
- print "delete $chain ($sig)\n" if $verbose;
+ next if defined($ruleset->{$chain});
+ my $action = 'delete';
+ my $sig = $active_chains->{$chain};
+ if (defined($change_only_regex)) {
+ $action = 'ignore' if ($chain !~ m/$change_only_regex/);
+ $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
+ $sig = $sig->{sig};
}
+ $statushash->{$chain}->{action} = $action;
+ $statushash->{$chain}->{sig} = $sig;
+ print "$action $chain ($sig)\n" if $verbose;
}
return $statushash;
}
sub get_ruleset_cmdlist {
- my ($ruleset, $verbose, $iptablescmd) = @_;
+ my ($ruleset, $iptablescmd) = @_;
my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
- my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
# create missing chains first
foreach my $chain (sort keys %$ruleset) {
return wantarray ? ($cmdlist, $changes) : $cmdlist;
}
+my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
+
+sub get_ebtables_cmdlist {
+ my ($ruleset) = @_;
+
+ my $changes = 0;
+ my $cmdlist = "*filter\n";
+
+ my $active_chains = ebtables_get_chains();
+ my $statushash = get_ruleset_status($ruleset, $active_chains,
+ \&iptables_chain_digest,
+ $pve_ebtables_chainname_regex);
+
+ # create chains first and make sure PVE rules are evaluated if active
+ my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
+ my $pve_include = 0;
+ foreach my $chain (sort keys %$statushash) {
+ next if ($statushash->{$chain}->{action} eq 'delete');
+ $cmdlist .= ":$chain ACCEPT\n";
+ $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
+ }
+
+ foreach my $chain (sort keys %$statushash) {
+ my $stat = $statushash->{$chain};
+ next if ($stat->{action} eq 'delete');
+ $changes = 1 if ($stat->{action} !~ 'ignore|exists');
+
+ foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
+ if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
+ next if ! $pve_include;
+ $pve_include = 0;
+ }
+ $cmdlist .= "$cmd\n";
+ }
+ }
+ $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
+
+ return wantarray ? ($cmdlist, $changes) : $cmdlist;
+}
+
sub get_ipset_cmdlist {
- my ($ruleset, $verbose) = @_;
+ my ($ruleset) = @_;
my $cmdlist = "";
my $delete_cmdlist = "";
my $active_chains = ipset_get_chains();
- my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
# remove stale _swap chains
foreach my $chain (keys %$active_chains) {
}
sub apply_ruleset {
- my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
+ my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
enable_bridge_firewall();
my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
- get_ipset_cmdlist($ipset_ruleset, $verbose);
+ get_ipset_cmdlist($ipset_ruleset);
- my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
- my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
+ my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
+ my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
+ my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
if ($verbose) {
if ($ipset_changes) {
print "ip6tables changes:\n";
print $cmdlistv6;
}
+
+ if ($ebtables_changes) {
+ print "ebtables changes:\n";
+ print $ebtables_cmdlist;
+ }
}
my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
+ ebtables_restore_cmdlist($ebtables_cmdlist);
+
+ $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
+ PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
+
# test: re-read status and check if everything is up to date
my $active_chains = iptables_get_chains();
- my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
my $errors;
foreach my $chain (sort keys %$ruleset) {
}
my $active_chainsv6 = iptables_get_chains("ip6tables");
- my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
+ my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
foreach my $chain (sort keys %$rulesetv6) {
my $stat = $statushashv6->{$chain};
}
}
+ my $active_ebtables_chains = ebtables_get_chains();
+ my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
+ $active_ebtables_chains, \&iptables_chain_digest,
+ $pve_ebtables_chainname_regex);
+
+ foreach my $chain (sort keys %$ebtables_ruleset) {
+ my $stat = $ebtables_statushash->{$chain};
+ if ($stat->{action} ne 'exists') {
+ warn "ebtables : unable to update chain '$chain'\n";
+ $errors = 1;
+ }
+ }
+
die "unable to apply firewall changes\n" if $errors;
update_nf_conntrack_max($hostfw_conf);
update_nf_conntrack_tcp_timeout_established($hostfw_conf);
+ update_nf_conntrack_logging($hostfw_conf);
}
sub update_nf_conntrack_max {
PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
}
+my $log_nf_conntrack_enabled = undef;
+sub update_nf_conntrack_logging {
+ my ($hostfw_conf) = @_;
+
+ my $options = $hostfw_conf->{options} || {};
+ my $value = $options->{log_nf_conntrack} || 0;
+ if (!defined($log_nf_conntrack_enabled)
+ || $value != $log_nf_conntrack_enabled)
+ {
+ my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
+ PVE::Tools::file_set_contents($tmpfile, $value);
+
+ PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
+ $log_nf_conntrack_enabled = $value;
+ }
+}
+
sub remove_pvefw_chains {
PVE::Firewall::remove_pvefw_chains_iptables("iptables");
my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
- apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
+ apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
};
run_locked($code);
projects / pve-firewall.git / blobdiff