next if $line =~m/^#/;
next if ($line =~m/^\s*$/);
- if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
+ if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
$services->{byid}->{$2}->{name} = $1;
$services->{byid}->{$2}->{port} = $2;
$services->{byid}->{$2}->{$3} = 1;
return $etc_services;
}
-my $etc_protocols;
-
-sub get_etc_protocols {
- return $etc_protocols if $etc_protocols;
-
- my $filename = "/etc/protocols";
+sub parse_protocol_file {
+ my ($filename) = @_;
my $fh = IO::File->new($filename, O_RDONLY);
if (!$fh) {
next if $line =~m/^#/;
next if ($line =~m/^\s*$/);
- if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
+ if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
$protocols->{byid}->{$2}->{name} = $1;
$protocols->{byname}->{$1} = $protocols->{byid}->{$2};
}
close($fh);
+ return $protocols;
+}
+
+my $etc_protocols;
+
+sub get_etc_protocols {
+ return $etc_protocols if $etc_protocols;
+
+ my $protocols = parse_protocol_file('/etc/protocols');
+
# add special case for ICMP v6
$protocols->{byid}->{icmpv6}->{name} = "icmpv6";
$protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
return $etc_protocols;
}
+my $etc_ethertypes;
+
+sub get_etc_ethertypes {
+ $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
+ if !$etc_ethertypes;
+ return $etc_ethertypes;
+}
+
my $__local_network;
sub local_network {
my @elements = split(/,/, $str);
die "extraneous commas in list\n" if $str ne join(',', @elements);
foreach my $item (@elements) {
- $count++;
- if ($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;
} else {
}
}
- die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
+ die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
- return $count;
+ # I really don't like to use the word number here, but it's the only thing
+ # that makes sense in a literal way. The range 1:100 counts as 2, not as
+ # one and not as 100...
+ die "too many entries in port list (> 15 numbers)\n"
+ if $count > 15;
+
+ return (scalar(@elements) > 1);
}
PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
minimum => 0,
optional => 1,
},
+ ebtables => {
+ description => "Enable ebtables rules cluster wide.",
+ type => 'boolean',
+ default => 1,
+ optional => 1,
+ },
policy_in => {
description => "Input policy.",
type => 'string',
type => 'boolean',
optional => 1,
},
+ nf_conntrack_allow_invalid => {
+ description => "Allow invalid packets on connection tracking.",
+ 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) = @_;
if (my $proto = $rule->{proto}) {
push @match, "-p $proto";
- my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
- my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
-
- my $multiport = 0;
- $multiport++ if $nbdport > 1;
- $multiport++ if $nbsport > 1;
+ my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
+ my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
- push @match, "--match multiport" if $multiport;
+ my $add_dport = sub {
+ return if !$rule->{dport};
- die "multiport: option '--sports' cannot be used together with '--dports'\n"
- if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
-
- if ($rule->{dport}) {
if ($proto eq 'icmp') {
# Note: we use dport to store --icmp-type
die "unknown icmp-type '$rule->{dport}'\n"
push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
} elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
die "protocol $proto does not have ports\n";
+ } elsif ($multidport) {
+ push @match, "--match multiport", "--dports $rule->{dport}";
} else {
- if ($nbdport > 1) {
- if ($multiport == 2) {
- push @match, "--ports $rule->{dport}";
- } else {
- push @match, "--dports $rule->{dport}";
- }
- } else {
- push @match, "--dport $rule->{dport}";
- }
+ push @match, "--dport $rule->{dport}";
}
- }
+ };
+
+ my $add_sport = sub {
+ return if !$rule->{sport};
- if ($rule->{sport}) {
die "protocol $proto does not have ports\n"
if !$PROTOCOLS_WITH_PORTS->{$proto};
- if ($nbsport > 1) {
- push @match, "--sports $rule->{sport}" if $multiport != 2;
+ if ($multisport) {
+ push @match, "--match multiport", "--sports $rule->{sport}";
} else {
push @match, "--sport $rule->{sport}";
}
- }
+ };
+
+ # order matters - single port before multiport!
+ $add_dport->() if $multisport;
+ $add_sport->();
+ $add_dport->() if !$multisport;
} elsif ($rule->{dport} || $rule->{sport}) {
die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
}
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 $targetstr";
return @iptcmds;
}
-sub ruleset_generate_match {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
-
- return if defined($rule->{enable}) && !$rule->{enable};
- return if $rule->{errors};
-
- return $rule->{match} if defined $rule->{match};
-
- die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
-
- my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
- my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
-
- my @cmd = ();
-
- push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
- push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
-
- my $source = $rule->{source};
- my $dest = $rule->{dest};
-
- push @cmd, ipt_gen_src_or_dst_match($source, 's', $ipversion, $cluster_conf, $fw_conf) if $source;
- push @cmd, ipt_gen_src_or_dst_match($dest, 'd', $ipversion, $cluster_conf, $fw_conf) if $dest;
-
- if (my $proto = $rule->{proto}) {
- push @cmd, "-p $proto";
-
- my $multiport = 0;
- $multiport++ if $nbdport > 1;
- $multiport++ if $nbsport > 1;
-
- push @cmd, "--match multiport" if $multiport;
-
- die "multiport: option '--sports' cannot be used together with '--dports'\n"
- if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
-
- if ($rule->{dport}) {
- if ($proto eq 'icmp') {
- # Note: we use dport to store --icmp-type
- die "unknown icmp-type '$rule->{dport}'\n"
- if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
- push @cmd, "-m icmp --icmp-type $rule->{dport}";
- } elsif ($proto eq 'icmpv6') {
- # Note: we use dport to store --icmpv6-type
- die "unknown icmpv6-type '$rule->{dport}'\n"
- if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
- push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
- } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
- die "protocol $proto does not have ports\n";
- } else {
- if ($nbdport > 1) {
- if ($multiport == 2) {
- push @cmd, "--ports $rule->{dport}";
- } else {
- push @cmd, "--dports $rule->{dport}";
- }
- } else {
- push @cmd, "--dport $rule->{dport}";
- }
- }
- }
-
- if ($rule->{sport}) {
- die "protocol $proto does not have ports\n"
- if !$PROTOCOLS_WITH_PORTS->{$proto};
- if ($nbsport > 1) {
- push @cmd, "--sports $rule->{sport}" if $multiport != 2;
- } else {
- push @cmd, "--sport $rule->{sport}";
- }
- }
- } elsif ($rule->{dport} || $rule->{sport}) {
- die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
- die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
- }
-
- push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
-
- return scalar(@cmd) ? join(' ', @cmd) : undef;
-}
-
-sub ruleset_generate_action {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
-
- return $rule->{target} if defined $rule->{target};
-
- my @cmd = ();
-
- if (my $action = $rule->{action}) {
- $action = $actions->{$action} if defined($actions->{$action});
- $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
- push @cmd, $goto ? "-g $action" : "-j $action";
- }
-
- return scalar(@cmd) ? join(' ', @cmd) : undef;
-}
-
sub ruleset_generate_rule {
- my ($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, $c);
}
}
-sub ruleset_generate_rule_insert {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
-
- die "implement me" if $rule->{macro}; # not implemented, because not needed so far
-
- my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto);
- my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto);
- if (defined $match && defined $action) {
- ruleset_insertrule($ruleset, $chain, $match, $action);
- }
-}
-
sub ruleset_create_chain {
my ($ruleset, $chain) = @_;
}
sub ruleset_addrule {
- my ($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 {
# 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: $msg\"";
+ return "-m limit --limit 1/sec -j NFLOG --nflog-prefix \":$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 $@;
foreach my $rule (@$rules) {
next if $rule->{type} ne 'in';
+ next if !$rule->{enable} || $rule->{errors};
next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
foreach my $rule (@$rules) {
next if $rule->{type} ne 'out';
+ next if !$rule->{enable} || $rule->{errors};
next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
# we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
# check also other tap rules later
$rule->{dest} = $1;
next;
}
+ if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
+ $rule->{log} = $1;
+ next;
+ }
last;
}
return $rule;
}
+sub verify_ethertype {
+ my ($value) = @_;
+ my $types = get_etc_ethertypes();
+ die "unknown ethernet protocol type: $value\n"
+ if !defined($types->{byname}->{$value}) &&
+ !defined($types->{byid}->{$value});
+}
+
sub parse_vmfw_option {
my ($line) = @_;
} elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
$opt = lc($1);
$value = $2;
+ } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
+ $opt = lc($1);
+ $value = $2;
+ verify_ethertype($_) foreach split(/\s*,\s*/, $value);
} else {
die "can't parse option '$line'\n"
}
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);
$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";
}
$vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
}
- return ({},{},{}) if !$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 };
}
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 $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
- return ($ruleset, $ipset_ruleset, $rulesetv6);
+ return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
}
sub compile_iptables_filter {
# 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);
return $ipset_ruleset;
}
+sub compile_ebtables_filter {
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
+
+ if (!($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($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
+
+ # generate firewall rules for QEMU VMs
+ 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 $netid (sort keys %$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};
+ 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 $vmid (sort keys %{$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 $netid (sort keys %$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};
+ 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
+ }
+
+ return $ruleset;
+}
+
+sub generate_tap_layer2filter {
+ my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
+ my $options = $vmfw_conf->{options};
+
+ my $tapchain = $iface."-OUT";
+
+ # ebtables remove zeros from mac pairs
+ $macaddr =~ s/0([0-9a-f])/$1/ig;
+ $macaddr = lc($macaddr);
+
+ ruleset_create_chain($ruleset, $tapchain);
+
+ if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
+ ruleset_addrule($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, $protochain, "-p $proto", '-j RETURN');
+ }
+ ruleset_addrule($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, $verbose, $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 $statushash;
return wantarray ? ($cmdlist, $changes) : $cmdlist;
}
+my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
+
+sub get_ebtables_cmdlist {
+ my ($ruleset, $verbose) = @_;
+
+ my $changes = 0;
+ my $cmdlist = "*filter\n";
+
+ my $active_chains = ebtables_get_chains();
+ my $statushash = get_ruleset_status($ruleset, $active_chains,
+ \&iptables_chain_digest, $verbose,
+ $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, $verbose) = @_;
}
sub apply_ruleset {
- my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
+ my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
enable_bridge_firewall();
my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
+ my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
if ($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 $active_ebtables_chains = ebtables_get_chains();
+ my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
+ $active_ebtables_chains, \&iptables_chain_digest,
+ 0, $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 $hostfw_conf = load_hostfw_conf($cluster_conf);
- my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
+ my ($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);