X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=src%2FPVE%2FFirewall.pm;h=250a642a58eb93f5c426ab7a4ad917196aecff87;hb=c5a10084b3661fc4410fb97210e2f156bf0890e3;hp=97e5384c725ae73f42e399890b0251115d224b94;hpb=e1639957a44ea8d42fbf8ea8e0b997fbe92b0aa8;p=pve-firewall.git diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm index 97e5384..250a642 100644 --- a/src/PVE/Firewall.pm +++ b/src/PVE/Firewall.pm @@ -394,6 +394,10 @@ my $pve_fw_macros = { { action => 'PARAM', proto => 'udp', dport => '5632' }, { action => 'PARAM', proto => 'tcp', dport => '5631' }, ], + 'PMG' => [ + "Proxmox Mail Gateway web interface", + { action => 'PARAM', proto => 'tcp', dport => '8006' }, + ], 'POP3' => [ "POP3 traffic", { action => 'PARAM', proto => 'tcp', dport => '110' }, @@ -978,8 +982,8 @@ sub local_network { } # ipset names are limited to 31 characters, -# and we use '-v4' or '-v6' to indicate IP versions, -# and we use '_swap' suffix for atomic update, +# and we use '-v4' or '-v6' to indicate IP versions, +# and we use '_swap' suffix for atomic update, # for example PVEFW-${VMID}-${ipset_name}_swap my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap"); @@ -1273,6 +1277,14 @@ our $host_option_properties = { default => 432000, minimum => 7875, }, + nf_conntrack_tcp_timeout_syn_recv => { + description => "Conntrack syn recv timeout.", + type => 'integer', + optional => 1, + default => 60, + minimum => 30, + maximum => 60, + }, ndp => { description => "Enable NDP (Neighbor Discovery Protocol).", type => 'boolean', @@ -1285,6 +1297,24 @@ our $host_option_properties = { default => 0, optional => 1, }, + protection_synflood => { + description => "Enable synflood protection", + type => 'boolean', + default => 0, + optional => 1, + }, + protection_synflood_rate => { + description => "Synflood protection rate syn/sec by ip src.", + type => 'integer', + optional => 1, + default => 200, + }, + protection_synflood_burst => { + description => "Synflood protection rate burst by ip src.", + type => 'integer', + optional => 1, + default => 1000, + }, log_nf_conntrack => { description => "Enable logging of conntrack information.", type => 'boolean', @@ -1646,7 +1676,7 @@ sub verify_rule { } if ($rule->{source}) { - eval { + eval { my $source_ipversion = parse_address_list($rule->{source}); &$set_ip_version($source_ipversion); }; @@ -1655,8 +1685,8 @@ sub verify_rule { } if ($rule->{dest}) { - eval { - my $dest_ipversion = parse_address_list($rule->{dest}); + eval { + my $dest_ipversion = parse_address_list($rule->{dest}); &$set_ip_version($dest_ipversion); }; &$add_error('dest', $@) if $@; @@ -1757,15 +1787,17 @@ sub enable_bridge_firewall { } sub iptables_restore_cmdlist { - my ($cmdlist) = @_; + my ($cmdlist, $table) = @_; - run_command(['iptables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist"); + $table = 'filter' if !$table; + run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist"); } sub ip6tables_restore_cmdlist { - my ($cmdlist) = @_; + my ($cmdlist, $table) = @_; - run_command(['ip6tables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist"); + $table = 'filter' if !$table; + run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist"); } sub ipset_restore_cmdlist { @@ -1781,9 +1813,10 @@ sub ebtables_restore_cmdlist { } sub iptables_get_chains { - my ($iptablescmd) = @_; + my ($iptablescmd, $t) = @_; $iptablescmd = "iptables" if !$iptablescmd; + $t = 'filter' if !$t; my $res = {}; @@ -1818,7 +1851,7 @@ sub iptables_get_chains { return; } - return if $table ne 'filter'; + return if $table ne $t; if ($line =~ m/^:(\S+)\s/) { my $chain = $1; @@ -1828,7 +1861,7 @@ sub iptables_get_chains { my ($chain, $sig) = ($1, $2); return if !&$is_pvefw_chain($chain); $res->{$chain} = $sig; - } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) { + } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) { $hooks->{$1} = 1; } else { # simply ignore the rest @@ -2231,7 +2264,7 @@ sub ruleset_create_vm_chain { if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) { if ($ipversion == 4) { if ($direction eq 'OUT') { - ruleset_generate_rule($ruleset, $chain, $ipversion, + ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'PVEFW-SET-ACCEPT-MARK', proto => 'udp', sport => 68, dport => 67 }); } else { @@ -2458,6 +2491,7 @@ sub enable_host_firewall { $rule->{iface_in} = $rule->{iface} if $rule->{iface}; eval { + $rule->{logmsg} = "$rule->{action}: "; if ($rule->{type} eq 'group') { ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion); } elsif ($rule->{type} eq 'in') { @@ -2476,6 +2510,7 @@ sub enable_host_firewall { ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH + ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 60000:60050", "-j $accept_action"); # Migration # corosync inbound rules if (defined($corosync_conf)) { @@ -2749,13 +2784,13 @@ sub parse_hostfw_option { my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; - if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) { + if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\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/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) { + } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) { $opt = lc($1); $value = int($2); } else { @@ -2808,7 +2843,7 @@ sub parse_ip_or_cidr { my ($cidr) = @_; my $ipversion; - + if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) { $cidr =~ s|/128$||; $ipversion = 6; @@ -2895,7 +2930,7 @@ sub generic_fw_config_parser { warn "$prefix: $err"; next; } - + $res->{$section}->{$group} = []; $res->{group_comments}->{$group} = decode('utf8', $comment) if $comment; @@ -2911,7 +2946,7 @@ sub generic_fw_config_parser { $section = 'ipset'; $group = lc($1); my $comment = $2; - eval { + eval { die "ipset name too long\n" if length($group) > $max_ipset_name_length; die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/; }; @@ -2980,7 +3015,7 @@ sub generic_fw_config_parser { $errors->{nomatch} = "nomatch not supported by kernel"; } - eval { + eval { if ($cidr =~ m/^${ip_alias_pattern}$/) { resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists } else { @@ -3158,7 +3193,7 @@ my $format_aliases = sub { my $format_ipsets = sub { my ($fw_conf) = @_; - + my $raw = ''; foreach my $ipset (sort keys %{$fw_conf->{ipset}}) { @@ -3249,12 +3284,12 @@ sub read_vm_firewall_configs { foreach my $vmid (keys %{$vmdata->{qemu}}) { my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir); - next if !$vmfw_conf->{options}; # skip if file does not exists + next if !$vmfw_conf->{options}; # skip if file does not exist $vmfw_configs->{$vmid} = $vmfw_conf; } foreach my $vmid (keys %{$vmdata->{lxc}}) { my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir); - next if !$vmfw_conf->{options}; # skip if file does not exists + next if !$vmfw_conf->{options}; # skip if file does not exist $vmfw_configs->{$vmid} = $vmfw_conf; } @@ -3445,7 +3480,7 @@ sub save_clusterfw_conf { $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases); $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset}; - + my $rules = $cluster_conf->{rules}; if ($rules && scalar(@$rules)) { $raw .= "[RULES]\n\n"; @@ -3552,14 +3587,42 @@ sub compile { push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet }; - my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4); - my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6); + my $ruleset = {}; + my $rulesetv6 = {}; + $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4); + $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4); + $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6); + $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6); my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata); my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata); return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset); } +sub compile_iptables_raw { + my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_; + + my $ruleset = {}; + + my $hostfw_options = $hostfw_conf->{options} || {}; + my $protection_synflood = $hostfw_options->{protection_synflood} || 0; + + if($protection_synflood) { + + my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200; + my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000; + my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000; + my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60; + $protection_synflood_expire = $protection_synflood_expire * 1000; + my $protection_synflood_mask = $ipversion == 4 ? 32 : 64; + + ruleset_create_chain($ruleset, "PVEFW-PREROUTING"); + ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP"); + } + + return $ruleset; +} + sub compile_iptables_filter { my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_; @@ -3670,7 +3733,7 @@ sub compile_ipsets { 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 }; } @@ -3841,7 +3904,9 @@ sub compile_ebtables_filter { # ebtables changes this to a .0/MASK network but we just # want the address here, no network - see #2193 $ip =~ s|/(\d+)$||; - push @$arpfilter, $ip; + if ($ip ne 'dhcp') { + push @$arpfilter, $ip; + } } generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter); } @@ -3958,11 +4023,13 @@ sub print_sig_rule { } sub get_ruleset_cmdlist { - my ($ruleset, $iptablescmd) = @_; + my ($ruleset, $iptablescmd, $table) = @_; - my $cmdlist = "*filter\n"; # we pass this to iptables-restore; + $table = 'filter' if !$table; - my ($active_chains, $hooks) = iptables_get_chains($iptablescmd); + my $cmdlist = "*$table\n"; # we pass this to iptables-restore; + + my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table); my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest); # create missing chains first @@ -3974,7 +4041,7 @@ sub get_ruleset_cmdlist { $cmdlist .= ":$chain - [0:0]\n"; } - foreach my $h (qw(INPUT OUTPUT FORWARD)) { + foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) { my $chain = "PVEFW-$h"; if ($ruleset->{$chain} && !$hooks->{$h}) { $cmdlist .= "-A $h -j $chain\n"; @@ -4009,10 +4076,11 @@ sub get_ruleset_cmdlist { next if $chain eq 'PVEFW-INPUT'; next if $chain eq 'PVEFW-OUTPUT'; next if $chain eq 'PVEFW-FORWARD'; + next if $chain eq 'PVEFW-PREROUTING'; $cmdlist .= "-X $chain\n"; } - my $changes = $cmdlist ne "*filter\n" ? 1 : 0; + my $changes = $cmdlist ne "*$table\n" ? 1 : 0; $cmdlist .= "COMMIT\n"; @@ -4125,9 +4193,11 @@ sub apply_ruleset { my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) = get_ipset_cmdlist($ipset_ruleset); - my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset); - my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables"); + my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter}); + my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables"); my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset); + my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw'); + my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw'); if ($verbose) { if ($ipset_changes) { @@ -4146,6 +4216,16 @@ sub apply_ruleset { print $cmdlistv6; } + if ($changes_raw) { + print "iptables table raw changes:\n"; + print $cmdlist_raw; + } + + if ($changesv6_raw) { + print "ip6tables table raw changes:\n"; + print $cmdlistv6_raw; + } + if ($ebtables_changes) { print "ebtables changes:\n"; print $ebtables_cmdlist; @@ -4162,11 +4242,21 @@ sub apply_ruleset { iptables_restore_cmdlist($cmdlist); + $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw"; + PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || ''); + + iptables_restore_cmdlist($cmdlist_raw, 'raw'); + $tmpfile = "$pve_fw_status_dir/ip6cmdlist"; PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || ''); ip6tables_restore_cmdlist($cmdlistv6); + $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw"; + PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || ''); + + ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw'); + $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2"; PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || ''); @@ -4178,11 +4268,12 @@ sub apply_ruleset { PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || ''); # test: re-read status and check if everything is up to date + my $ruleset_filter = $ruleset->{filter}; my $active_chains = iptables_get_chains(); - my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest); + my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest); my $errors; - foreach my $chain (sort keys %$ruleset) { + foreach my $chain (sort keys %$ruleset_filter) { my $stat = $statushash->{$chain}; if ($stat->{action} ne 'exists') { warn "unable to update chain '$chain'\n"; @@ -4190,10 +4281,11 @@ sub apply_ruleset { } } + my $rulesetv6_filter = $rulesetv6->{filter}; my $active_chainsv6 = iptables_get_chains("ip6tables"); - my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest); + my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest); - foreach my $chain (sort keys %$rulesetv6) { + foreach my $chain (sort keys %$rulesetv6_filter) { my $stat = $statushashv6->{$chain}; if ($stat->{action} ne 'exists') { warn "unable to update chain '$chain'\n"; @@ -4201,6 +4293,30 @@ sub apply_ruleset { } } + my $ruleset_raw = $ruleset->{raw}; + my $active_chains_raw = iptables_get_chains(undef, 'raw'); + my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest); + + foreach my $chain (sort keys %$ruleset_raw) { + my $stat = $statushash_raw->{$chain}; + if ($stat->{action} ne 'exists') { + warn "unable to update chain '$chain'\n"; + $errors = 1; + } + } + + my $rulesetv6_raw = $rulesetv6->{raw}; + my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw'); + my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest); + + foreach my $chain (sort keys %$rulesetv6_raw) { + my $stat = $statushashv6_raw->{$chain}; + if ($stat->{action} ne 'exists') { + warn "unable to update chain '$chain'\n"; + $errors = 1; + } + } + my $active_ebtables_chains = ebtables_get_chains(); my $ebtables_statushash = get_ruleset_status($ebtables_ruleset, $active_ebtables_chains, \&iptables_chain_digest, @@ -4220,6 +4336,8 @@ sub apply_ruleset { update_nf_conntrack_tcp_timeout_established($hostfw_conf); + update_nf_conntrack_tcp_timeout_syn_recv($hostfw_conf); + update_nf_conntrack_logging($hostfw_conf); } @@ -4257,6 +4375,16 @@ sub update_nf_conntrack_tcp_timeout_established { PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value); } +sub update_nf_conntrack_tcp_timeout_syn_recv { + my ($hostfw_conf) = @_; + + my $options = $hostfw_conf->{options} || {}; + + my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv}) ? $options->{nf_conntrack_tcp_timeout_syn_recev} : 60; + + PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value); +} + my $log_nf_conntrack_enabled = undef; sub update_nf_conntrack_logging { my ($hostfw_conf) = @_; @@ -4278,18 +4406,22 @@ sub remove_pvefw_chains { PVE::Firewall::remove_pvefw_chains_iptables("iptables"); PVE::Firewall::remove_pvefw_chains_iptables("ip6tables"); + PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw"); + PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw"); PVE::Firewall::remove_pvefw_chains_ipset(); PVE::Firewall::remove_pvefw_chains_ebtables(); } sub remove_pvefw_chains_iptables { - my ($iptablescmd) = @_; + my ($iptablescmd, $table) = @_; - my ($chash, $hooks) = iptables_get_chains($iptablescmd); - my $cmdlist = "*filter\n"; + $table = 'filter' if !$table; - foreach my $h (qw(INPUT OUTPUT FORWARD)) { + my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table); + my $cmdlist = "*$table\n"; + + foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) { if ($hooks->{$h}) { $cmdlist .= "-D $h -j PVEFW-$h\n"; } @@ -4305,9 +4437,9 @@ sub remove_pvefw_chains_iptables { $cmdlist .= "COMMIT\n"; if($iptablescmd eq "ip6tables") { - ip6tables_restore_cmdlist($cmdlist); + ip6tables_restore_cmdlist($cmdlist, $table); } else { - iptables_restore_cmdlist($cmdlist); + iptables_restore_cmdlist($cmdlist, $table); } } @@ -4316,7 +4448,7 @@ sub remove_pvefw_chains_ipset { my $ipset_chains = ipset_get_chains(); my $cmdlist = ""; - + foreach my $chain (keys %$ipset_chains) { $cmdlist .= "flush $chain\n"; $cmdlist .= "destroy $chain\n";