use Net::IP;
use PVE::Tools qw(run_command lock_file dir_glob_foreach);
use Encode;
+use Storable qw(dclone);
my $hostfw_conf_filename = "/etc/pve/local/host.fw";
my $pvefw_conf_dir = "/etc/pve/firewall";
emerg => 0,
};
+# %rule
+#
+# name => optional
+# action =>
+# proto =>
+# sport =>
+# dport =>
+# log => optional, loglevel
+# logmsg => optional, logmsg - overwrites default
+# iface_in
+# iface_out
+# match => optional, overwrites generation of match
+# target => optional, overwrites action
+
# we need to overwrite some macros for ipv6
my $pve_ipv6fw_macros = {
'Ping' => [
my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
my $pve_std_chains = {};
-$pve_std_chains->{4} = {
+my $pve_std_chains_conf = {};
+$pve_std_chains_conf->{4} = {
'PVEFW-SET-ACCEPT-MARK' => [
- "-j MARK --set-mark $FWACCEPTMARK_ON",
+ { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
],
'PVEFW-DropBroadcast' => [
# same as shorewall 'Broadcast'
{ action => 'DROP', dsttype => 'BROADCAST' },
{ action => 'DROP', source => '224.0.0.0/4' },
{ action => 'DROP', proto => 'icmp' },
- "-p tcp -j REJECT --reject-with tcp-reset",
- "-p udp -j REJECT --reject-with icmp-port-unreachable",
- "-p icmp -j REJECT --reject-with icmp-host-unreachable",
- "-j REJECT --reject-with icmp-host-prohibited",
+ { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
+ { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
+ { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
+ { target => '-j REJECT --reject-with icmp-host-prohibited' },
],
'PVEFW-Drop' => [
# same as shorewall 'Drop', which is equal to DROP,
{ action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
{ action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
# Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
# Drop Microsoft SMB noise
- { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
- { action => 'DROP', proto => 'udp', dport => '137:139'},
+ { action => 'DROP', proto => 'udp', dport => '135,445' },
+ { action => 'DROP', proto => 'udp', dport => '137:139' },
{ action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
+ { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
{ action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
# Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
# Drop DNS replies
{ action => 'DROP', proto => 'udp', sport => 53 },
],
{ action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
{ action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
# Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
# Drop Microsoft SMB noise
- { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
+ { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
{ action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
{ action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
{ action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
# Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
# Drop DNS replies
{ action => 'DROP', proto => 'udp', sport => 53 },
],
'PVEFW-tcpflags' => [
# same as shorewall tcpflags action.
# Packets arriving on this interface are checked for som illegal combinations of TCP flags
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
- "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
],
'PVEFW-smurfs' => [
# same as shorewall smurfs action
# Filter packets for smurfs (packets with a broadcast address as the source).
- "-s 0.0.0.0/32 -j RETURN", # allow DHCP
- "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
- "-s 224.0.0.0/4 -g PVEFW-smurflog",
+ { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
+ { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
+ { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
+ ],
+ 'PVEFW-smurflog' => [
+ { action => 'DROP', logmsg => 'DROP: ' },
+ ],
+ 'PVEFW-logflags' => [
+ { action => 'DROP', logmsg => 'DROP: ' },
],
};
-$pve_std_chains->{6} = {
+$pve_std_chains_conf->{6} = {
'PVEFW-SET-ACCEPT-MARK' => [
- "-j MARK --set-mark $FWACCEPTMARK_ON",
+ { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
],
'PVEFW-DropBroadcast' => [
- # same as shorewall 'Broadcast'
- # simply DROP BROADCAST/MULTICAST/ANYCAST
- # we can use this to reduce logging
- #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
+ # same as shorewall 'Broadcast'
+ # simply DROP BROADCAST/MULTICAST/ANYCAST
+ # we can use this to reduce logging
+ #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
# ipv6 addrtype does not work with kernel 2.6.32
#{ action => 'DROP', dsttype => 'MULTICAST' },
- #{ action => 'DROP', dsttype => 'ANYCAST' },
- { action => 'DROP', dest => 'ff00::/8' },
- #{ action => 'DROP', dest => '224.0.0.0/4' },
+ #{ action => 'DROP', dsttype => 'ANYCAST' },
+ { action => 'DROP', dest => 'ff00::/8' },
+ #{ action => 'DROP', dest => '224.0.0.0/4' },
],
'PVEFW-reject' => [
- # same as shorewall 'reject'
- #{ action => 'DROP', dsttype => 'BROADCAST' },
- #{ action => 'DROP', source => '224.0.0.0/4' },
+ # same as shorewall 'reject'
+ #{ action => 'DROP', dsttype => 'BROADCAST' },
+ #{ action => 'DROP', source => '224.0.0.0/4' },
{ action => 'DROP', proto => 'icmpv6' },
- "-p tcp -j REJECT --reject-with tcp-reset",
- #"-p udp -j REJECT --reject-with icmp-port-unreachable",
- #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
- #"-j REJECT --reject-with icmp-host-prohibited",
+ { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
+ #"-p udp -j REJECT --reject-with icmp-port-unreachable",
+ #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
+ #"-j REJECT --reject-with icmp-host-prohibited",
],
'PVEFW-Drop' => [
- # same as shorewall 'Drop', which is equal to DROP,
- # but REJECT/DROP some packages to reduce logging,
- # and ACCEPT critical ICMP types
+ # same as shorewall 'Drop', which is equal to DROP,
+ # but REJECT/DROP some packages to reduce logging,
+ # and ACCEPT critical ICMP types
{ action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
- # we are not interested in BROADCAST/MULTICAST/ANYCAST
- { action => 'PVEFW-DropBroadcast' },
- # ACCEPT critical ICMP types
- { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
- { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
- { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
-
- # Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
- # Drop Microsoft SMB noise
- { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
+ # we are not interested in BROADCAST/MULTICAST/ANYCAST
+ { action => 'PVEFW-DropBroadcast' },
+ # ACCEPT critical ICMP types
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
+ # Drop packets with INVALID state
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
+ # Drop Microsoft SMB noise
+ { action => 'DROP', proto => 'udp', dport => '135,445' },
{ action => 'DROP', proto => 'udp', dport => '137:139'},
{ action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
+ { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
{ action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
- # Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
- # Drop DNS replies
+ # Drop new/NotSyn traffic so that it doesn't get logged
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
+ # Drop DNS replies
{ action => 'DROP', proto => 'udp', sport => 53 },
],
'PVEFW-Reject' => [
- # same as shorewall 'Reject', which is equal to Reject,
- # but REJECT/DROP some packages to reduce logging,
- # and ACCEPT critical ICMP types
- { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
- # we are not interested in BROADCAST/MULTICAST/ANYCAST
- { action => 'PVEFW-DropBroadcast' },
- # ACCEPT critical ICMP types
- { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
- { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
- { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
-
- # Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
- # Drop Microsoft SMB noise
- { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
- { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
- { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
- { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
- # Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
- # Drop DNS replies
- { action => 'DROP', proto => 'udp', sport => 53 },
+ # same as shorewall 'Reject', which is equal to Reject,
+ # but REJECT/DROP some packages to reduce logging,
+ # and ACCEPT critical ICMP types
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
+ # we are not interested in BROADCAST/MULTICAST/ANYCAST
+ { action => 'PVEFW-DropBroadcast' },
+ # ACCEPT critical ICMP types
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
+ # Drop packets with INVALID state
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
+ # Drop Microsoft SMB noise
+ { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
+ { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
+ { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
+ { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
+ # Drop new/NotSyn traffic so that it doesn't get logged
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
+ # Drop DNS replies
+ { action => 'DROP', proto => 'udp', sport => 53 },
],
'PVEFW-tcpflags' => [
- # same as shorewall tcpflags action.
- # Packets arriving on this interface are checked for som illegal combinations of TCP flags
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
- "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
+ # same as shorewall tcpflags action.
+ # Packets arriving on this interface are checked for som illegal combinations of TCP flags
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
+ ],
+ 'PVEFW-logflags' => [
+ { action => 'DROP', logmsg => 'DROP: ' },
],
};
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($rule->{dport}, 1) : 0;
sub ruleset_generate_action {
my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
+ return $rule->{target} if defined $rule->{target};
+
my @cmd = ();
if (my $action = $rule->{action}) {
# update all or nothing
+ # fixme: lots of temporary ugliness
my @mstrs = ();
my @astrs = ();
+ my @logging = ();
+ my @logmsg = ();
foreach my $tmp (@$rules) {
my $m = ruleset_generate_match($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
my $a = ruleset_generate_action($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
if (defined $m or defined $a) {
push @mstrs, defined($m) ? $m : "";
push @astrs, defined($a) ? $a : "";
+ push @logging, $tmp->{log};
+ push @logmsg, $tmp->{logmsg};
}
}
for my $i (0 .. $#mstrs) {
- ruleset_addrule($ruleset, $chain, $mstrs[$i], $astrs[$i]);
+ ruleset_addrule($ruleset, $chain, $mstrs[$i], $astrs[$i], $logging[$i], $logmsg[$i]);
}
}
return $ruleset->{$chain} ? 1 : undef;
}
-sub ruleset_addrule_old {
- my ($ruleset, $chain, $rule) = @_;
-
- die "no such chain '$chain'\n" if !$ruleset->{$chain};
-
- push @{$ruleset->{$chain}}, "-A $chain $rule";
-}
-
sub ruleset_addrule {
- my ($ruleset, $chain, $match, $action, $log) = @_;
+ my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
die "no such chain '$chain'\n" if !$ruleset->{$chain};
+ if (defined($log) && $log) {
+ my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
+ push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
+ }
push @{$ruleset->{$chain}}, "-A $chain $match $action";
}
sub get_log_rule_base {
my ($chain, $vmid, $msg, $loglevel) = @_;
- die "internal error - no log level" if !defined($loglevel);
-
$vmid = 0 if !defined($vmid);
+ $msg = "" if !defined($msg);
# Note: we use special format for prefix to pass further
- # info to log daemon (VMID, LOGVELEL and CHAIN)
+ # info to log daemon (VMID, LOGLEVEL and CHAIN)
return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
}
-sub ruleset_addlog {
- my ($ruleset, $chain, $vmid, $msg, $loglevel, $match) = @_;
-
- return if !defined($loglevel);
-
- my $logaction = get_log_rule_base($chain, $vmid, $msg, $loglevel);
-
- $match = "" if !defined $match;
- ruleset_addrule($ruleset, $chain, $match, $logaction);
-}
-
sub ruleset_add_chain_policy {
my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
- ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
-
- ruleset_addrule($ruleset, $chain, "", "-j DROP");
+ ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
} elsif ($policy eq 'REJECT') {
ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
- ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
-
- ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject");
+ ruleset_addrule($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($ruleset, "PVEFW-blacklist");
- ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
- ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP");
+ ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
}
my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
my $loglevel = get_option_log_level($options, 'smurf_log_level');
-
- my $chain;
-
- if ($ipversion == 4) {
- # same as shorewall smurflog.
- $chain = 'PVEFW-smurflog';
- $std_chains->{$chain} = [];
-
- push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
- push @{$std_chains->{$chain}}, "-j DROP";
+ my $chain = 'PVEFW-smurflog';
+ if ( $std_chains->{$chain} ) {
+ foreach my $r (@{$std_chains->{$chain}}) {
+ $r->{log} = $loglevel;
+ }
}
# same as shorewall logflags action.
$loglevel = get_option_log_level($options, 'tcp_flags_log_level');
$chain = 'PVEFW-logflags';
- $std_chains->{$chain} = [];
-
- # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
- push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
- push @{$std_chains->{$chain}}, "-j DROP";
+ if ( $std_chains->{$chain} ) {
+ foreach my $r (@{$std_chains->{$chain}}) {
+ $r->{log} = $loglevel;
+ }
+ }
foreach my $chain (keys %$std_chains) {
ruleset_create_chain($ruleset, $chain);
if (ref($rule)) {
ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
} else {
- ruleset_addrule_old($ruleset, $chain, $rule);
+ die "rule $rule as string - should not happen";
}
}
}
my $vmfw_configs;
+ # fixme: once we read standard chains from config this needs to be put in test/standard cases below
+ $pve_std_chains = dclone($pve_std_chains_conf);
+
if ($vmdata) { # test mode
my $testdir = $vmdata->{testdir} || die "no test directory specified";
my $filename = "$testdir/cluster.fw";
projects / pve-firewall.git / blobdiff