use Data::Dumper;
+# fixme: use ULOG instead of LOG?
+
my $nodename = PVE::INotify::nodename();
my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
return 1;
}
-sub ruleset_generate_rule {
+sub ruleset_generate_cmdstr {
my ($ruleset, $chain, $rule, $actions, $goto) = @_;
return if $rule->{disable};
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, $chain) = @_;
}
sub generate_bridge_chains {
- my ($ruleset, $hostfw_conf, $bridge) = @_;
+ my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
my $options = $hostfw_conf->{options} || {};
-
- # fixme: what log level should we use here?
- my $loglevel = get_option_log_level($options, "log_level_out");
+
+ 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 $bridge-FW");
- # disable interbridge routing
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j PVEFW-Drop");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j PVEFW-Drop");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP");
+ ruleset_addrule($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, "PVEFW-INPUT", "-i $bridge -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, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
}
}
sub generate_venet_rules_direction {
my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
- # fixme: $ip is a list of CIDRs?
+ parse_address_list($ip); # make sure we have a valid $ip list
my $lc_direction = lc($direction);
my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
-
+ # plug into FORWARD, INPUT and OUTPUT chain
+ if ($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 => $ip,
+ iface_out => 'venet0'});
+ }
}
sub generate_tap_rules_direction {
ruleset_add_chain_policy($ruleset, $tapchain, $policy, $loglevel, $accept_action);
# 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", $rule);
+ if ($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 $tapchain");
+ }
}
sub enable_host_firewall {
ruleset_addrule($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, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
# we use RETURN because we need to check also tap rules
ruleset_addrule($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
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) {
return $status;
}
+# 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 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 = {};
my $filename = "/etc/pve/firewall/groups.fw";
if (my $fh = IO::File->new($filename, O_RDONLY)) {
ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
my $hostfw_options = {};
my $hostfw_conf = {};
$bridge .= "v$net->{tag}" if $net->{tag};
- generate_bridge_chains($ruleset, $hostfw_conf, $bridge);
+ generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
my $macaddr = $net->{macaddr};
generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
warn "no bridge device for CT $vmid iface '$netid'\n";
next; # fixme?
}
- my $macaddr = $d->{host_mac};
+
+ generate_bridge_chains($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, $bridge, 'IN');
generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
}
}
+ # fixme: this is an optimization? if so, we should also drop INVALID packages?
+ ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
+
+ # 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($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
+
return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
}
}
sub apply_ruleset {
- my ($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 $verbose;
my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
- update_nf_conntrack_max($hostfw_conf);
-
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