use strict;
use Data::Dumper;
use Digest::SHA;
+use PVE::INotify;
+use PVE::Cluster;
use PVE::ProcFSTools;
use PVE::Tools;
-use PVE::QemuServer;
use File::Basename;
use File::Path;
use IO::File;
use Net::IP;
use PVE::Tools qw(run_command lock_file);
+use Encode;
+
+# dynamically include PVE::QemuServer and PVE::OpenVZ
+# to avoid dependency problems
+my $have_qemu_server;
+eval {
+ require PVE::QemuServer;
+ $have_qemu_server = 1;
+};
+
+my $have_pve_manager;
+eval {
+ require PVE::OpenVZ;
+ $have_pve_manager = 1;
+};
use Data::Dumper;
+my $nodename = PVE::INotify::nodename();
+
my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
return ($nbports);
}
+# helper function for API
+sub cleanup_fw_rule {
+ my ($rule, $digest, $pos) = @_;
+
+ my $r = {};
+
+ foreach my $k (keys %$rule) {
+ next if $k eq 'nbdport';
+ next if $k eq 'nbsport';
+ my $v = $rule->{$k};
+ next if !defined($v);
+ $r->{$k} = $v;
+ $r->{digest} = $digest;
+ $r->{pos} = $pos;
+ }
+
+ return $r;
+}
+
my $bridge_firewall_enabled = 0;
sub enable_bridge_firewall {
PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
+ # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
+ PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
+
$bridge_firewall_enabled = 1;
}
return 1 if $name =~ m/^PVEFW-\S+$/;
return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
+
+ return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
+
+ return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
+
return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
return 1;
}
-sub ruleset_generate_rule {
+sub ruleset_generate_cmdstr {
my ($ruleset, $chain, $rule, $actions, $goto) = @_;
- return if $rule->{disable};
+ return if defined($rule->{enable}) && !$rule->{enable};
my @cmd = ();
+ push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
+ push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
+
push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
push @cmd, "-s $rule->{source}" if $rule->{source};
push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
push @cmd, $goto ? "-g $action" : "-j $action";
}
- if (scalar(@cmd)) {
- my $cmdstr = join(' ', @cmd);
+ return scalar(@cmd) ? join(' ', @cmd) : undef;
+}
+
+sub ruleset_generate_rule {
+ my ($ruleset, $chain, $rule, $actions, $goto) = @_;
+
+ if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
ruleset_addrule($ruleset, $chain, $cmdstr);
}
}
+sub ruleset_generate_rule_insert {
+ my ($ruleset, $chain, $rule, $actions, $goto) = @_;
+
+ if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
+ ruleset_insertrule($ruleset, $chain, $cmdstr);
+ }
+}
+
sub ruleset_create_chain {
my ($ruleset, $chain) = @_;
die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
+ die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
die "chain '$chain' already exists\n" if $ruleset->{$chain};
unshift @{$ruleset->{$chain}}, "-A $chain $rule";
}
+sub get_log_rule_base {
+ my ($chain, $vmid, $msg, $loglevel) = @_;
+
+ die "internal error - no log level" if !defined($loglevel);
+
+ $vmid = 0 if !defined($vmid);
+
+ # Note: we use special format for prefix to pass further
+ # info to log daemon (VMID, LOGVELEL and CHAIN)
+
+ return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
+}
+
+sub ruleset_addlog {
+ my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
+
+ return if !defined($loglevel);
+
+ my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
+
+ $logrule = "$rule $logrule" if defined($rule);
+
+ ruleset_addrule($ruleset, $chain, $logrule)
+}
+
sub generate_bridge_chains {
- my ($ruleset, $bridge) = @_;
+ my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
- if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
- ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- }
+ my $options = $hostfw_conf->{options} || {};
+
+ die "error: detected direct route to bridge '$bridge'\n"
+ if !$options->{allow_bridge_route} && $routing_table->{$bridge};
if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
ruleset_create_chain($ruleset, "$bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
}
if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
ruleset_create_chain($ruleset, "$bridge-OUT");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
+ ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
+ ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
}
if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
ruleset_create_chain($ruleset, "$bridge-IN");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
+ ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
# accept traffic to unmanaged bridge ports
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
+ ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
}
}
-sub generate_tap_rules_direction {
- my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
+sub ruleset_add_chain_policy {
+ my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
- my $lc_direction = lc($direction);
+ if ($policy eq 'ACCEPT') {
- my $rules = $vmfw_conf->{rules};
+ ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
+ { ACCEPT => $accept_action});
- my $options = $vmfw_conf->{options};
- my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
+ } elsif ($policy eq 'DROP') {
- my $tapchain = "$iface-$direction";
+ ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
+
+ ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
+
+ ruleset_addrule($ruleset, $chain, "-j DROP");
+ } elsif ($policy eq 'REJECT') {
+ ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
+
+ ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
+
+ ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
+ } else {
+ # should not happen
+ die "internal error: unknown policy '$policy'";
+ }
+}
+
+sub ruleset_create_vm_chain {
+ my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
- ruleset_create_chain($ruleset, $tapchain);
+ ruleset_create_chain($ruleset, $chain);
+ my $accept = generate_nfqueue($options);
if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
- ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
}
if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
- ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
+ if ($direction eq 'OUT') {
+ ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
+ proto => 'udp', sport => 68, dport => 67 });
+ } else {
+ ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
+ proto => 'udp', sport => 67, dport => 68 });
+ }
}
if ($options->{tcpflags}) {
- ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
+ ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
}
- ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
+ if($direction eq 'OUT'){
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
- if ($direction eq 'OUT' && defined($macaddr) &&
- !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
- ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
+ }else{
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
+ }
+ if ($direction eq 'OUT') {
+ if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
+ ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
+ }
+ ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
}
+
+}
+
+sub ruleset_generate_vm_rules {
+ my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction, $options) = @_;
+
+ my $lc_direction = lc($direction);
+
foreach my $rule (@$rules) {
next if $rule->{iface} && $rule->{iface} ne $netid;
- next if $rule->{disable};
+ next if !$rule->{enable};
if ($rule->{type} eq 'group') {
my $group_chain = "GROUP-$rule->{action}-$direction";
if(!ruleset_chain_exist($ruleset, $group_chain)){
generate_group_rules($ruleset, $groups_conf, $rule->{action});
}
- ruleset_addrule($ruleset, $tapchain, "-j $group_chain");
- ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
- if $direction eq 'OUT';
+ ruleset_addrule($ruleset, $chain, "-j $group_chain");
+ if ($direction eq 'OUT'){
+ ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
+ }else{
+ my $accept = generate_nfqueue($options);
+ ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
+ }
+
} else {
next if $rule->{type} ne $lc_direction;
if ($direction eq 'OUT') {
- ruleset_generate_rule($ruleset, $tapchain, $rule,
+ ruleset_generate_rule($ruleset, $chain, $rule,
{ ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
} else {
- ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" });
+ my $accept = generate_nfqueue($options);
+ ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" });
+ }
+ }
+ }
+}
+
+sub generate_nfqueue {
+ my ($options) = @_;
+
+ my $action = "";
+ if($options->{ips}){
+ $action = "NFQUEUE";
+ if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
+ if(defined($3) && defined($1)) {
+ $action .= " --queue-balance $1:$3";
+ }elsif (defined($1)) {
+ $action .= " --queue-num $1";
}
}
+ $action .= " --queue-bypass";
+ }else{
+ $action = "ACCEPT";
}
+ return $action;
+}
+
+sub generate_venet_rules_direction {
+ my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
+
+ parse_address_list($ip); # make sure we have a valid $ip list
+
+ my $lc_direction = lc($direction);
+
+ my $rules = $vmfw_conf->{rules};
+
+ my $options = $vmfw_conf->{options};
+ my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
+
+ my $chain = "venet0-$vmid-$direction";
+
+ ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
+
+ ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
+
# implement policy
my $policy;
if ($direction eq 'OUT') {
- $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
+ $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
} else {
- $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
+ $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
}
- if ($policy eq 'ACCEPT') {
- if ($direction eq 'OUT') {
- ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
- } else {
- ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
- }
- } elsif ($policy eq 'DROP') {
+ my $accept = generate_nfqueue($options);
+ my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
+ ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
- ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop");
+ # plug into FORWARD, INPUT and OUTPUT chain
+ if ($direction eq 'OUT') {
+ ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
+ action => $chain,
+ source => $ip,
+ iface_in => 'venet0'});
+
+ ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
+ action => $chain,
+ source => $ip,
+ iface_in => 'venet0'});
+ } else {
+ ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
+ action => $chain,
+ dest => $ip,
+ iface_out => 'venet0'});
+
+ ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
+ action => $chain,
+ dest => $ip,
+ iface_out => 'venet0'});
+ }
+}
- ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level $loglevel")
- if defined($loglevel);
+sub generate_tap_rules_direction {
+ my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
- ruleset_addrule($ruleset, $tapchain, "-j DROP");
- } elsif ($policy eq 'REJECT') {
- ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject");
+ my $lc_direction = lc($direction);
+
+ my $rules = $vmfw_conf->{rules};
+
+ my $options = $vmfw_conf->{options};
+ my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
+
+ my $tapchain = "$iface-$direction";
- ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level $loglevel")
- if defined($loglevel);
+ ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
- ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
+ ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction, $options);
+
+ # implement policy
+ my $policy;
+
+ if ($direction eq 'OUT') {
+ $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
} else {
- # should not happen
- die "internal error: unknown policy '$policy'";
+ $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
}
- # plug the tap chain to bridge chain
- my $physdevdirection = $direction eq 'IN' ? "out" : "in";
- my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
- ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
+ 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, $accept_action);
- if ($direction eq 'OUT'){
- # add tap->host rules
- my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
- ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
+ # plug the tap chain to bridge chain
+ if ($direction eq 'IN') {
+ ruleset_insertrule($ruleset, "$bridge-IN",
+ "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
+ } else {
+ ruleset_insertrule($ruleset, "$bridge-OUT",
+ "-m physdev --physdev-in $iface -j $tapchain");
}
}
-sub enablehostfw {
+sub enable_host_firewall {
my ($ruleset, $hostfw_conf, $groups_conf) = @_;
# fixme: allow security groups
my $loglevel = get_option_log_level($options, "log_level_in");
+ if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
+ }
+
+ if ($options->{tcpflags}) {
+ ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
+ }
+
ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+ # we use RETURN because we need to check also tap rules
+ my $accept_action = 'RETURN';
+
foreach my $rule (@$rules) {
next if $rule->{type} ne 'in';
- # we use RETURN because we need to check also tap rules
- ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
}
- ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level $loglevel")
- if defined($loglevel);
-
- ruleset_addrule($ruleset, $chain, "-j DROP");
+ # implement input policy
+ my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
+ ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
# host outbound firewall
$chain = "PVEFW-HOST-OUT";
ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+ # we use RETURN because we may want to check other thigs later
+ $accept_action = 'RETURN';
+
foreach my $rule (@$rules) {
next if $rule->{type} ne 'out';
- # we use RETURN because we need to check also tap rules
- ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
}
- ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level $loglevel")
- if defined($loglevel);
-
- ruleset_addrule($ruleset, $chain, "-j DROP");
+ # implement output policy
+ $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
+ ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
sub generate_group_rules {
my ($ruleset, $groups_conf, $group) = @_;
+ die "no such security group '$group'\n" if !$groups_conf->{rules}->{$group};
- die "no such security group '$group'\n" if !$groups_conf->{$group};
-
- my $rules = $groups_conf->{$group}->{rules};
+ my $rules = $groups_conf->{rules}->{$group};
my $chain = "GROUP-${group}-IN";
ruleset_create_chain($ruleset, $chain);
+ ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
foreach my $rule (@$rules) {
next if $rule->{type} ne 'in';
- ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
}
$chain = "GROUP-${group}-OUT";
my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
# we can add single line comments to the end of the rule
- my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
+ my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
# we can disable a rule when prefixed with '|'
- my $disable = 1 if $line =~ s/^\|//;
+ my $enable = 1;
+
+ $enable = 0 if $line =~ s/^\|//;
my @data = split(/\s+/, $line);
my $expected_elements = $need_iface ? 8 : 7;
if ($need_iface) {
$iface = undef if $iface && $iface eq '-';
- die "unknown interface '$iface'\n"
- if defined($iface) && !$valid_netdev_names->{$iface};
}
$proto = undef if $proto && $proto eq '-';
my $param = {
type => $type,
- disable => $disable,
+ enable => $enable,
comment => $comment,
action => $action,
iface => $iface,
my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
- if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
+ if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
$opt = lc($1);
$value = int($2);
} elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
$opt = lc($1);
$value = $2 ? lc($3) : '';
- } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
+ } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
$opt = lc($1);
$value = uc($3);
+ } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
+ $opt = lc($1);
+ $value = $2;
} else {
chomp $line;
die "can't parse option '$line'\n"
my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
- if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
+ if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\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) {
$opt = lc($1);
$value = $2 ? lc($3) : '';
- } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
+ } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
$opt = lc($1);
$value = uc($3);
+ } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
} else {
chomp $line;
die "can't parse option '$line'\n"
my $section;
+ my $digest = Digest::SHA->new('sha1');
+
while (defined(my $line = <$fh>)) {
+ $digest->add($line);
+
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
push @{$res->{$section}}, @$rules;
}
+ $res->{digest} = $digest->b64digest;
+
return $res;
}
my $section;
+ my $digest = Digest::SHA->new('sha1');
+
while (defined(my $line = <$fh>)) {
+ $digest->add($line);
+
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
push @{$res->{$section}}, @$rules;
}
+ $res->{digest} = $digest->b64digest;
+
return $res;
}
my $section;
my $group;
- my $res = { rules => [] };
+ my $res = { rules => {} };
+
+ my $digest = Digest::SHA->new('sha1');
while (defined(my $line = <$fh>)) {
+ $digest->add($line);
+
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
next;
}
- push @{$res->{$group}->{$section}}, @$rules;
+ push @{$res->{$section}->{$group}}, @$rules;
}
+ $res->{digest} = $digest->b64digest;
+
return $res;
}
sub read_local_vm_config {
my $openvz = {};
-
my $qemu = {};
- my $list = PVE::QemuServer::config_list();
+ my $vmdata = { openvz => $openvz, qemu => $qemu };
- foreach my $vmid (keys %$list) {
- my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
- if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
- $qemu->{$vmid} = $conf;
+ my $vmlist = PVE::Cluster::get_vmlist();
+ return $vmdata if !$vmlist || !$vmlist->{ids};
+ my $ids = $vmlist->{ids};
+
+ foreach my $vmid (keys %$ids) {
+ next if !$vmid; # skip VE0
+ my $d = $ids->{$vmid};
+ next if !$d->{node} || $d->{node} ne $nodename;
+ next if !$d->{type};
+ if ($d->{type} eq 'openvz') {
+ if ($have_pve_manager) {
+ my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
+ if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
+ $openvz->{$vmid} = $conf;
+ }
+ }
+ } elsif ($d->{type} eq 'qemu') {
+ if ($have_qemu_server) {
+ my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
+ if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
+ $qemu->{$vmid} = $conf;
+ }
+ }
}
}
- my $vmdata = { openvz => $openvz, qemu => $qemu };
-
return $vmdata;
};
-sub read_vm_firewall_rules {
+sub load_vmfw_conf {
+ my ($vmid) = @_;
+
+ my $vmfw_conf = {};
+
+ my $filename = "/etc/pve/firewall/$vmid.fw";
+ if (my $fh = IO::File->new($filename, O_RDONLY)) {
+ $vmfw_conf = parse_vm_fw_rules($filename, $fh);
+ }
+
+ return $vmfw_conf;
+}
+
+sub read_vm_firewall_configs {
my ($vmdata) = @_;
- my $rules = {};
- foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
- my $filename = "/etc/pve/firewall/$vmid.fw";
- my $fh = IO::File->new($filename, O_RDONLY);
- next if !$fh;
+ my $vmfw_configs = {};
- $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
+ foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
+ my $vmfw_conf = load_vmfw_conf($vmid);
+ next if !$vmfw_conf->{options}; # skip if file does not exists
+ $vmfw_configs->{$vmid} = $vmfw_conf;
}
- return $rules;
+ return $vmfw_configs;
}
sub get_option_log_level {
my $loglevel = get_option_log_level($options, 'smurf_log_level');
# same as shorewall smurflog.
- if (defined($loglevel)) {
- $pve_std_chains-> {'PVEFW-smurflog'} = [
- "-j LOG --log-prefix \"smurfs-dropped\" --log-level $loglevel",
- "-j DROP",
- ];
- } else {
- $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
- }
+ my $chain = 'PVEFW-smurflog';
+
+ push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+ push @{$pve_std_chains->{$chain}}, "-j DROP";
# same as shorewall logflags action.
$loglevel = get_option_log_level($options, 'tcp_flags_log_level');
- if (defined($loglevel)) {
- $pve_std_chains-> {'PVEFW-logflags'} = [
- "-j LOG --log-prefix \"logflags-dropped:\" --log-level $loglevel --log-ip-options",
- "-j DROP",
- ];
- } else {
- $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
- }
+ $chain = 'PVEFW-logflags';
+ # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
+ push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+ push @{$pve_std_chains->{$chain}}, "-j DROP";
foreach my $chain (keys %$pve_std_chains) {
ruleset_create_chain($ruleset, $chain);
return $status;
}
-sub compile {
- my $vmdata = read_local_vm_config();
- my $rules = read_vm_firewall_rules($vmdata);
+# fixme: move to pve-common PVE::ProcFSTools
+sub read_proc_net_route {
+ my $filename = "/proc/net/route";
+
+ my $res = {};
+
+ my $fh = IO::File->new ($filename, "r");
+ return $res if !$fh;
+
+ my $int_to_quad = sub {
+ return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
+ };
+
+ while (defined(my $line = <$fh>)) {
+ next if $line =~/^Iface\s+Destination/; # skip head
+ my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
+ push @{$res->{$iface}}, {
+ dest => &$int_to_quad(hex($dest)),
+ gateway => &$int_to_quad(hex($gateway)),
+ mask => &$int_to_quad(hex($mask)),
+ metric => $metric,
+ mtu => $mtu,
+ };
+ }
+
+ return $res;
+}
+
+sub load_security_groups {
my $groups_conf = {};
my $filename = "/etc/pve/firewall/groups.fw";
$groups_conf = parse_group_fw_rules($filename, $fh);
}
- #print Dumper($rules);
+ return $groups_conf;
+}
+
+sub load_hostfw_conf {
+
+ my $hostfw_conf = {};
+ my $filename = "/etc/pve/local/host.fw";
+ if (my $fh = IO::File->new($filename, O_RDONLY)) {
+ $hostfw_conf = parse_host_fw_rules($filename, $fh);
+ }
+ return $hostfw_conf;
+}
+
+sub compile {
+ my $vmdata = read_local_vm_config();
+ my $vmfw_configs = read_vm_firewall_configs($vmdata);
+
+ my $routing_table = read_proc_net_route();
+
+ my $groups_conf = load_security_groups();
my $ruleset = {};
ruleset_create_chain($ruleset, "PVEFW-INPUT");
ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
+
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- my $hostfw_options = {};
- my $hostfw_conf;
-
- $filename = "/etc/pve/local/host.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $hostfw_conf = parse_host_fw_rules($filename, $fh);
- $hostfw_options = $hostfw_conf->{options};
- }
+ my $hostfw_conf = load_hostfw_conf();
+ my $hostfw_options = $hostfw_conf->{options} || {};
generate_std_chains($ruleset, $hostfw_options);
- my $hostfw_enable = $hostfw_conf &&
- !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
+ my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
- enablehostfw($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
+ enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
# generate firewall rules for QEMU VMs
foreach my $vmid (keys %{$vmdata->{qemu}}) {
my $conf = $vmdata->{qemu}->{$vmid};
- my $vmfw_conf = $rules->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
next if !$vmfw_conf;
next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
$bridge .= "v$net->{tag}" if $net->{tag};
- generate_bridge_chains($ruleset, $bridge);
+ generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
my $macaddr = $net->{macaddr};
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'IN');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'OUT');
}
}
- if ($hostfw_enable) {
- # allow traffic from lo (ourself)
- ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
+ # generate firewall rules for OpenVZ containers
+ foreach my $vmid (keys %{$vmdata->{openvz}}) {
+ my $conf = $vmdata->{openvz}->{$vmid};
+
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ next if !$vmfw_conf;
+ next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
+
+ if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
+ my $ip = $conf->{ip_address}->{value};
+ generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
+ generate_venet_rules_direction($ruleset, $groups_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 = $d->{bridge};
+ if (!$bridge) {
+ warn "no bridge device for CT $vmid iface '$netid'\n";
+ next; # fixme?
+ }
+
+ generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
+
+ my $macaddr = $d->{mac};
+ my $iface = $d->{host_ifname};
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'IN');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'OUT');
+ }
+ }
}
- return $ruleset;
+ # fixme: what log level should we use here?
+ my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
+
+ # fixme: should we really block inter-bridge traffic?
+
+ # always allow traffic from containers?
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
+
+ # disable interbridge routing
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
+ ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
+ ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
+
+ return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
}
sub get_ruleset_status {
}
sub apply_ruleset {
- my ($ruleset, $verbose) = @_;
+ my ($ruleset, $hostfw_conf, $verbose) = @_;
enable_bridge_firewall();
+ update_nf_conntrack_max($hostfw_conf);
+
my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
print $cmdlist if $verbose;
die "unable to apply firewall changes\n" if $errors;
}
+sub update_nf_conntrack_max {
+ my ($hostfw_conf) = @_;
+
+ my $max = 65536; # reasonable default
+
+ my $options = $hostfw_conf->{options} || {};
+
+ if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
+ $max = $options->{nf_conntrack_max};
+ $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
+ }
+
+ my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
+ my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
+
+ my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
+
+ if ($current != $max) {
+ my $hashsize = int($max/4);
+ PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
+ PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
+ }
+}
+
sub update {
my ($start, $verbose) = @_;
my $code = sub {
my $status = read_pvefw_status();
- my $ruleset = PVE::Firewall::compile();
+ my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
if ($start || $status eq 'active') {
save_pvefw_status('active') if ($status ne 'active');
- PVE::Firewall::apply_ruleset($ruleset, $verbose);
+ apply_ruleset($ruleset, $hostfw_conf, $verbose);
} else {
print "Firewall not active (status = $status)\n" if $verbose;
}
projects / pve-firewall.git / blobdiff