my $default_log_level = 'nolog'; # avoid logs by default
+my $global_log_ratelimit = '--limit 1/sec';
+
my $log_level_hash = {
debug => 7,
info => 6,
],
'Razor' => [
"Razor Antispam System",
- { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
+ { action => 'PARAM', proto => 'tcp', dport => '2703' },
],
'Rdate' => [
"Remote time retrieval (rdate)",
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 = {
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',
}
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";
- }
- # for stable ebtables digests avoid double-spaces to match ebtables-save output
- $match .= ' ' if length($match);
- 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'";
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, $iface);
# plug the tap chain to bridge chain
if ($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: ', $vmid);
}
}
ruleset_add_group_rule($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 $@;
$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 $@;
$rule->{dest} = $1;
next;
}
+ if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
+ $rule->{log} = $1;
+ next;
+ }
last;
}
} elsif ($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"
}
$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})
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 $cluster_conf = {};
if (my $fh = IO::File->new($filename, O_RDONLY)) {
$cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
+
+ $set_global_log_ratelimit->($cluster_conf->{options});
}
return $cluster_conf;
my $conf = $vmdata->{qemu}->{$vmid};
my $vmfw_conf = $vmfw_configs->{$vmid};
return if !$vmfw_conf;
+ my $ipsets = $vmfw_conf->{ipset};
foreach my $netid (sort keys %$conf) {
next if $netid !~ m/^net(\d+)$/;
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
my $vmfw_conf = $vmfw_configs->{$vmid};
return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
+ my $ipsets = $vmfw_conf->{ipset};
foreach my $netid (sort keys %$conf) {
next if $netid !~ m/^net(\d+)$/;
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");
}
projects / pve-firewall.git / blobdiff