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suricata_generate_yaml.php
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suricata_generate_yaml.php
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<?php
/*
* suricata_generate_yaml.php
*
* part of pfSense (https://www.pfsense.org)
* Copyright (c) 2006-2023 Rubicon Communications, LLC (Netgate)
* Copyright (c) 2005 Bill Marquette <bill.marquette@gmail.com>.
* Copyright (c) 2003-2004 Manuel Kasper <mk@neon1.net>.
* Copyright (c) 2009 Robert Zelaya Sr. Developer
* Copyright (c) 2023 Bill Meeks
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Create required Suricata directories if they don't exist
$suricata_dirs = array( $suricatadir, $suricatacfgdir, "{$suricatacfgdir}/rules",
"{$suricatalogdir}suricata_{$if_real}{$suricata_uuid}" );
foreach ($suricata_dirs as $dir) {
if (!is_dir($dir))
safe_mkdir($dir);
}
// Copy required generic files to the interface sub-directory
$config_files = array( "classification.config", "reference.config", "gen-msg.map", "unicode.map" );
foreach ($config_files as $file) {
if (file_exists("{$suricatadir}{$file}"))
@copy("{$suricatadir}{$file}", "{$suricatacfgdir}/{$file}");
}
// Read the configuration parameters for the passed interface
// and construct appropriate string variables for use in the
// suricata.yaml template include file.
// Set HOME_NET and EXTERNAL_NET for the interface
$home_net_list = suricata_build_list($suricatacfg, $suricatacfg['homelistname']);
$home_net = implode(", ", $home_net_list);
$home_net = trim($home_net);
$external_net = "";
if (!empty($suricatacfg['externallistname']) && $suricatacfg['externallistname'] != 'default') {
$external_net_list = suricata_build_list($suricatacfg, $suricatacfg['externallistname'], false, true);
$external_net = implode(", ", $external_net_list);
$external_net = "[" . trim($external_net) . "]";
}
else {
$external_net = "[!\$HOME_NET]";
}
// Set the PASS LIST and write its contents to disk,
// but only if using Legacy Mode blocking. Otherwise,
// just create an empty placeholder file.
unlink_if_exists("{$suricatacfgdir}/rules/passlist.rules");
$suri_passlist = "{$suricatacfgdir}/passlist";
if ($suricatacfg['ips_mode'] == 'ips_mode_legacy' && $suricatacfg['blockoffenders'] == 'on' && $suricatacfg['passlistname'] != 'none') {
$plist = suricata_build_list($suricatacfg, $suricatacfg['passlistname'], true);
@file_put_contents("{$suricatacfgdir}/passlist", implode("\n", $plist));
}
else {
file_put_contents("{$suricatacfgdir}/passlist", '');
}
// Set default and user-defined variables for SERVER_VARS and PORT_VARS
$suricata_servers = array (
"dns_servers" => "\$HOME_NET", "smtp_servers" => "\$HOME_NET", "http_servers" => "\$HOME_NET",
"sql_servers" => "\$HOME_NET", "telnet_servers" => "\$HOME_NET", "dnp3_server" => "\$HOME_NET",
"dnp3_client" => "\$HOME_NET", "modbus_server" => "\$HOME_NET", "modbus_client" => "\$HOME_NET",
"enip_server" => "\$HOME_NET", "enip_client" => "\$HOME_NET", "ftp_servers" => "\$HOME_NET", "ssh_servers" => "\$HOME_NET",
"aim_servers" => "64.12.24.0/23, 64.12.28.0/23, 64.12.161.0/24, 64.12.163.0/24, 64.12.200.0/24, 205.188.3.0/24, 205.188.5.0/24, 205.188.7.0/24, 205.188.9.0/24, 205.188.153.0/24, 205.188.179.0/24, 205.188.248.0/24",
"sip_servers" => "\$HOME_NET"
);
$addr_vars = "";
foreach ($suricata_servers as $alias => $avalue) {
if (!empty($suricatacfg["def_{$alias}"]) && is_alias($suricatacfg["def_{$alias}"])) {
$avalue = trim(filter_expand_alias($suricatacfg["def_{$alias}"]));
$avalue = preg_replace('/\s+/', ', ', trim($avalue));
}
$addr_vars .= " " . strtoupper($alias) . ": \"{$avalue}\"\n";
}
$addr_vars = trim($addr_vars);
if(config_get_path('system/ssh/port'))
$ssh_port = config_get_path('system/ssh/port');
else
$ssh_port = "22";
$suricata_ports = array(
"ftp_ports" => "21",
"http_ports" => "80",
"oracle_ports" => "1521",
"ssh_ports" => $ssh_port,
"shellcode_ports" => "!80",
"DNP3_PORTS" => "20000",
"file_data_ports" => "\$HTTP_PORTS, 110, 143",
"sip_ports" => "5060, 5061, 5600"
);
$port_vars = "";
foreach ($suricata_ports as $alias => $avalue) {
if (!empty($suricatacfg["def_{$alias}"]) && is_alias($suricatacfg["def_{$alias}"])) {
$avalue = trim(filter_expand_alias($suricatacfg["def_{$alias}"]));
$avalue = preg_replace('/\s+/', ', ', trim($avalue));
}
$port_vars .= " " . strtoupper($alias) . ": \"{$avalue}\"\n";
}
$port_vars = trim($port_vars);
// Define a Suppress List (Threshold) if one is configured
$suppress = suricata_find_list($suricatacfg['suppresslistname'], 'suppress');
if (!empty($suppress)) {
$suppress_data = str_replace("\r", "", base64_decode($suppress['suppresspassthru']));
@file_put_contents("{$suricatacfgdir}/threshold.config", $suppress_data);
}
else
@file_put_contents("{$suricatacfgdir}/threshold.config", "");
// Add interface-specific performance and detection engine settings
if (!empty($suricatacfg['runmode']))
$runmode = $suricatacfg['runmode'];
else
$runmode = "autofp";
if (!empty($suricatacfg['autofp_scheduler']))
$autofp_scheduler = $suricatacfg['autofp_scheduler'];
else
$autofp_scheduler = "hash";
if (!empty($suricatacfg['max_pending_packets']))
$max_pend_pkts = $suricatacfg['max_pending_packets'];
else
$max_pend_pkts = 1024;
if (!empty($suricatacfg['detect_eng_profile']))
$detect_eng_profile = $suricatacfg['detect_eng_profile'];
else
$detect_eng_profile = "medium";
if (!empty($suricatacfg['sgh_mpm_context']))
$sgh_mpm_ctx = $suricatacfg['sgh_mpm_context'];
else
$sgh_mpm_ctx = "auto";
if (!empty($suricatacfg['mpm_algo']))
$mpm_algo = $suricatacfg['mpm_algo'];
else
$mpm_algo = "auto";
if (!empty($suricatacfg['inspect_recursion_limit']) || $suricatacfg['inspect_recursion_limit'] == '0')
$inspection_recursion_limit = $suricatacfg['inspect_recursion_limit'];
else
$inspection_recursion_limit = "";
if ($suricatacfg['delayed_detect'] == 'on')
$delayed_detect = "yes";
else
$delayed_detect = "no";
if ($suricatacfg['intf_promisc_mode'] == 'on')
$intf_promisc_mode = "yes";
else
$intf_promisc_mode = "no";
if (!empty($suricatacfg['intf_snaplen'])) {
$intf_snaplen = $suricatacfg['intf_snaplen'];
}
else {
$intf_snaplen = "1518";
}
// Add interface-specific blocking settings
if ($suricatacfg['blockoffenders'] == 'on' && $suricatacfg['ips_mode'] == 'ips_mode_legacy')
$suri_blockoffenders = "yes";
else
$suri_blockoffenders = "no";
if ($suricatacfg['blockoffenderskill'] == 'on')
$suri_killstates = "yes";
else
$suri_killstates = "no";
if ($suricatacfg['block_drops_only'] == 'on')
$suri_blockdrops = "yes";
else
$suri_blockdrops = "no";
if ($suricatacfg['blockoffendersip'] == 'src')
$suri_blockip = 'SRC';
elseif ($suricatacfg['blockoffendersip'] == 'dst')
$suri_blockip = 'DST';
else
$suri_blockip = 'BOTH';
$suri_pf_table = SURICATA_PF_TABLE;
// Add interface-specific logging settings
if ($suricatacfg['alertsystemlog'] == 'on')
$alert_syslog = "yes";
else
$alert_syslog = "no";
if (!empty($suricatacfg['alertsystemlog_facility']))
$alert_syslog_facility = $suricatacfg['alertsystemlog_facility'];
else
$alert_syslog_facility = "local5";
if (!empty($suricatacfg['alertsystemlog_priority']))
$alert_syslog_priority = $suricatacfg['alertsystemlog_priority'];
else
$alert_syslog_priority = "Info";
/****************************************/
/* Begin stats collection configuration */
/****************************************/
if ($suricatacfg['enable_stats_collection'] == 'on')
$stats_collection_enabled = "yes";
else
$stats_collection_enabled = "no";
if ($suricatacfg['enable_stats_collection'] == 'on' && $suricatacfg['enable_telegraf_stats'] == 'on' && !empty(base64_decode($suricatacfg['suricata_telegraf_unix_socket_name']))) {
$enable_telegraf_eve = "yes";
$telegraf_eve_sockname = base64_decode($suricatacfg['suricata_telegraf_unix_socket_name']);
}
else {
$enable_telegraf_eve = "no";
$telegraf_eve_sockname = "";
}
if (!empty($suricatacfg['stats_upd_interval']))
$stats_upd_interval = $suricatacfg['stats_upd_interval'];
else
$stats_upd_interval = "10";
if ($suricatacfg['append_stats_log'] == 'on')
$stats_log_append = "yes";
else
$stats_log_append = "no";
if ($suricatacfg['enable_stats_collection'] == 'on' && $suricatacfg['enable_stats_log'] == 'on') {
$stats_log_enabled = "yes";
}
else {
$stats_log_enabled = "no";
}
/****************************************/
/* End stats collection configuration */
/****************************************/
// HTTP log configuration
if ($suricatacfg['enable_http_log'] == 'on')
$http_log_enabled = "yes";
else
$http_log_enabled = "no";
if ($suricatacfg['append_http_log'] == 'on')
$http_log_append = "yes";
else
$http_log_append = "no";
if ($suricatacfg['http_log_filetype'] == 'unix_dgram' || $suricatacfg['http_log_filetype'] == 'unix_stream') {
$http_log_filetype = $suricatacfg['http_log_filetype'];
$http_log_filename = base64_decode($suricatacfg['http_log_socket']);
} else {
$http_log_filetype = "regular";
$http_log_filename = "http.log";
}
if ($suricatacfg['http_log_extended'] == 'on')
$http_log_extended = "yes";
else
$http_log_extended = "no";
// TLS log configuration
if ($suricatacfg['enable_tls_log'] == 'on')
$tls_log_enabled = "yes";
else
$tls_log_enabled = "no";
if ($suricatacfg['append_tls_log'] == 'on')
$tls_log_append = "yes";
else
$tls_log_append = "no";
if ($suricatacfg['tls_log_filetype'] == 'unix_dgram' || $suricatacfg['tls_log_filetype'] == 'unix_stream') {
$tls_log_filetype = $suricatacfg['tls_log_filetype'];
$tls_log_filename = base64_decode($suricatacfg['tls_log_socket']);
} else {
$tls_log_filetype = "regular";
$tls_log_filename = "tls.log";
}
if ($suricatacfg['tls_log_extended'] == 'on')
$tls_log_extended = "yes";
else
$tls_log_extended = "no";
if ($suricatacfg['tls_session_resumption'] == 'on')
$tls_session_resumption = "yes";
else
$tls_session_resumption = "no";
// TLS certificate store configuration
if ($suricatacfg['enable_tls_store'] == 'on') {
$tls_store_enabled = "yes";
$tls_certs_dir = "{$suricatalogdir}suricata_{$if_real}{$suricata_uuid}/certs";
safe_mkdir($tls_certs_dir);
} else
$tls_store_enabled = "no";
// File store configuration
if ($suricatacfg['enable_file_store'] == 'on') {
$file_store_enabled = "yes";
if (!empty($suricatacfg['file_store_logdir'])) {
$file_store_logdir = base64_decode($suricatacfg['file_store_logdir']);
}
else {
$file_store_logdir = "filestore";
}
}
else {
$file_store_enabled = "no";
$file_store_logdir = "filestore";
}
// PCAP logging and capture options
if ($suricatacfg['enable_pcap_log'] == 'on') {
$pcap_log_enabled = "yes";
$pcap_log_dir = "{$suricatalogdir}suricata_{$if_real}{$suricata_uuid}/pcaps";
safe_mkdir($pcap_log_dir);
} else
$pcap_log_enabled = "no";
if (!empty($suricatacfg['max_pcap_log_size']))
$pcap_log_limit_size = $suricatacfg['max_pcap_log_size'];
else
$pcap_log_limit_size = "32";
if (!empty($suricatacfg['max_pcap_log_files']))
$pcap_log_max_files = $suricatacfg['max_pcap_log_files'];
else
$pcap_log_max_files = "100";
if ($suricatacfg['pcap_use_stream_depth'] == "on")
$pcap_use_stream_depth = "yes";
else
$pcap_use_stream_depth = "no";
if ($suricatacfg['pcap_honor_pass_rules'] == "on")
$pcap_honor_pass_rules = "yes";
else
$pcap_honor_pass_rules = "no";
if (!empty($suricatacfg['pcap_log_conditional']))
$pcap_log_conditional = $suricatacfg['pcap_log_conditional'];
else
$pcap_log_conditional = "alerts";
// Unified2 X-Forwarded-For logging options
if ($suricatacfg['barnyard_xff_logging'] == 'on') {
$unified2_xff_output = "xff:";
$unified2_xff_output .= "\n enabled: yes";
if (!empty($suricatacfg['barnyard_xff_mode']))
$unified2_xff_output .= "\n mode: {$suricatacfg['barnyard_xff_mode']}";
else
$unified2_xff_output .= "\n mode: extra-data";
if (!empty($suricatacfg['barnyard_xff_deployment']))
$unified2_xff_output .= "\n deployment: {$suricatacfg['barnyard_xff_deployment']}";
else
$unified2_xff_output .= "\n deployment: reverse";
if (!empty($suricatacfg['barnyard_xff_header']))
$unified2_xff_output .= "\n header: {$suricatacfg['barnyard_xff_header']}";
else
$unified2_xff_output .= "\n header: X-Forwarded-For";
}
else {
$unified2_xff_output = "xff:";
$unified2_xff_output .= "\n enabled: no";
}
// EVE JSON log output settings
if ($suricatacfg['enable_eve_log'] == 'on')
$enable_eve_log = "yes";
else
$enable_eve_log = "no";
if (!empty($suricatacfg['eve_output_type'])) {
if ($suricatacfg['eve_output_type'] == 'unix_dgram' || $suricatacfg['eve_output_type'] == 'unix_stream') {
$eve_output_type = $suricatacfg['eve_output_type'];
$eve_output_filename = base64_decode($suricatacfg['eve_output_socket']);
} else {
$eve_output_type = $suricatacfg['eve_output_type'];
$eve_output_filename = "eve.json";
}
} else {
$eve_output_type = "regular";
$eve_output_filename = "eve.json";
}
// EVE SYSLOG output settings
if (!empty($suricatacfg['eve_systemlog_facility']))
$eve_systemlog_facility = $suricatacfg['eve_systemlog_facility'];
else
$eve_systemlog_facility = "local1";
if (!empty($suricatacfg['eve_systemlog_priority']))
$eve_systemlog_priority = $suricatacfg['eve_systemlog_priority'];
else
$eve_systemlog_priority = "info";
// EVE Ethernet headers setting
if (!empty($suricatacfg['eve_log_ethernet']))
$eve_ethernet_output = $suricatacfg['eve_log_ethernet'];
else
$eve_ethernet_output = "no";
// EVE REDIS output settings
if (!empty($suricatacfg['eve_redis_server']))
$eve_redis_output = "\n server: ". $suricatacfg['eve_redis_server'];
else
$eve_redis_output = "\n server: 127.0.0.1";
if (!empty($suricatacfg['eve_redis_port']))
$eve_redis_output .= "\n port: " . $suricatacfg['eve_redis_port'];
if (!empty($suricatacfg['eve_redis_mode']))
$eve_redis_output .= "\n mode: " . $suricatacfg['eve_redis_mode'];
if (!empty($suricatacfg['eve_redis_key']))
$eve_redis_output .= "\n key: \"" . $suricatacfg['eve_redis_key'] ."\"";
// EVE X-Forwarded-For settings
if ($suricatacfg['eve_log_alerts_xff'] == 'on'){
$eve_xff_enabled = "yes";
$eve_xff_mode = $suricatacfg['eve_log_alerts_xff_mode'];
$eve_xff_deployment = $suricatacfg['eve_log_alerts_xff_deployment'];
$eve_xff_header = $suricatacfg['eve_log_alerts_xff_header'];
}
else {
$eve_xff_enabled = "no";
$eve_xff_mode = $suricatacfg['eve_log_alerts_xff_mode'];
$eve_xff_deployment = $suricatacfg['eve_log_alerts_xff_deployment'];
$eve_xff_header = $suricatacfg['eve_log_alerts_xff_header'];
}
// EVE log output included information
$eve_out_types = "";
if ($suricatacfg['eve_log_alerts'] == 'on') {
$eve_out_types .= "\n - alert:";
$eve_out_types .= "\n payload: " . (($suricatacfg['eve_log_alerts_payload'] == 'on' || $suricatacfg['eve_log_alerts_payload'] == 'only-base64') ? 'yes':'no ') . " # enable dumping payload in Base64";
$eve_out_types .= "\n payload-buffer-size: 4kb # max size of payload buffer to output in eve-log";
$eve_out_types .= "\n payload-printable: " . (($suricatacfg['eve_log_alerts_payload'] == 'on' || $suricatacfg['eve_log_alerts_payload'] == 'only-printable') ? 'yes':'no ') . " # enable dumping payload in printable (lossy) format";
$eve_out_types .= "\n packet: " . ($suricatacfg['eve_log_alerts_packet'] == 'on' ? 'yes':'no ') . " # enable dumping of packet (without stream segments)";
$eve_out_types .= "\n http-body: " . (($suricatacfg['eve_log_alerts_payload'] == 'on'|| $suricatacfg['eve_log_alerts_payload'] == 'only-base64') ?'yes':'no ') . " # enable dumping of http body in Base64";
$eve_out_types .= "\n http-body-printable: " . (($suricatacfg['eve_log_alerts_payload'] == 'on' || $suricatacfg['eve_log_alerts_payload'] == 'only-printable') ? 'yes':'no ') . " # enable dumping of http body in printable format";
$eve_out_types .= "\n metadata: " . ($suricatacfg['eve_log_alerts_metadata'] == 'on' ? 'yes':'no ') . " # enable inclusion of app layer metadata with alert";
$eve_out_types .= "\n tagged-packets: " . ($suricatacfg['eve_log_alerts_tagged'] == 'on' ? 'yes':'no ') . " # enable logging of tagged packets for rules using the 'tag' keyword";
$eve_out_types .= "\n verdict: " . ($suricatacfg['eve_log_alerts_verdict'] == 'on' ? 'yes':'no ') . " # enable logging the final action taken on a packet by the engine";
}
if ($suricatacfg['eve_log_drops'] == 'on' ) {
$eve_out_types .= "\n - drop:";
$eve_out_types .= "\n alerts: " . ($suricatacfg['eve_log_alert_drops'] == 'on' ? 'yes':'no');
$eve_out_types .= "\n verdict: " . ($suricatacfg['eve_log_drops_verdict'] == 'on' ? 'yes':'no');
$eve_out_types .= "\n flows: " . ($suricatacfg['eve_log_drops_flows'] == 'start' ? 'start':'all');
}
if (($suricatacfg['eve_log_anomaly'] == 'on')) {
$eve_out_types .= "\n - anomaly:";
$eve_out_types .= "\n enabled: yes";
$eve_out_types .= "\n types:";
if ($suricatacfg['eve_log_anomaly_type_decode'] == 'on') {
$eve_out_types .= "\n decode: yes";
}
else {
$eve_out_types .= "\n decode: no";
}
if ($suricatacfg['eve_log_anomaly_type_stream'] == 'on') {
$eve_out_types .= "\n stream: yes";
}
else {
$eve_out_types .= "\n stream: no";
}
if ($suricatacfg['eve_log_anomaly_type_applayer'] == 'on') {
$eve_out_types .= "\n applayer: yes";
}
else {
$eve_out_types .= "\n applayer: no";
}
if ($suricatacfg['eve_log_anomaly_packethdr'] == 'on') {
$eve_out_types .= "\n packethdr: yes";
}
else {
$eve_out_types .= "\n packethdr: no";
}
}
if ($suricatacfg['eve_log_http'] == 'on') {
$eve_out_types .= "\n - http:";
if ($suricatacfg['eve_log_http_extended'] == 'on') {
$eve_out_types .= "\n extended: yes";
if ($suricatacfg['eve_log_http_extended_headers'] != "")
$eve_out_types .= "\n custom: [".$suricatacfg['eve_log_http_extended_headers']."]";
} else {
$eve_out_types .= "\n extended: no";
}
}
if ($suricatacfg['eve_log_dns'] == 'on') {
$eve_out_types .= "\n - dns:";
$eve_out_types .= "\n version: 2";
$eve_out_types .= "\n requests: yes";
$eve_out_types .= "\n responses: yes";
}
if ($suricatacfg['eve_log_tls'] == 'on') {
$eve_out_types .= "\n - tls:";
if ($suricatacfg['eve_log_tls_extended'] == 'on')
$eve_out_types .= "\n extended: yes";
else
$eve_out_types .= "\n extended: no";
if($suricatacfg['eve_log_tls_extended_fields'] != "")
$eve_out_types .= "\n custom: [".$suricatacfg['eve_log_tls_extended_fields']."]";
}
if ($suricatacfg['eve_log_files'] == 'on') {
$eve_out_types .= "\n - files:";
if ($suricatacfg['eve_log_files_magic'] == 'on')
$eve_out_types .= "\n force-magic: yes";
else
$eve_out_types .= "\n force-magic: no";
if ($suricatacfg['eve_log_files_hash'] != 'none') {
$eve_out_types .= "\n force-hash: {$suricatacfg['eve_log_files_hash']}";
}
}
if ($suricatacfg['eve_log_bittorrent'] == 'on') {
$eve_out_types .= "\n - bittorrent-dht";
}
if ($suricatacfg['eve_log_dhcp'] == 'on') {
$eve_out_types .= "\n - dhcp:";
$eve_out_types .= "\n enabled: yes";
if ($suricatacfg['eve_log_dhcp_extended'] == 'on')
$eve_out_types .= "\n extended: yes";
else
$eve_out_types .= "\n extended: no";
} else {
$eve_out_types .= "\n - dhcp:";
$eve_out_types .= "\n enabled: no";
}
if ($suricatacfg['eve_log_ftp'] == 'on') {
$eve_out_types .= "\n - ftp";
}
if ($suricatacfg['eve_log_http2'] == 'on') {
$eve_out_types .= "\n - http2";
}
if ($suricatacfg['eve_log_ikev2'] == 'on') {
$eve_out_types .= "\n - ike";
}
if ($suricatacfg['eve_log_krb5'] == 'on') {
$eve_out_types .= "\n - krb5";
}
if ($suricatacfg['eve_log_mqtt'] == 'on') {
$eve_out_types .= "\n - mqtt";
}
if ($suricatacfg['eve_log_nfs'] == 'on') {
$eve_out_types .= "\n - nfs";
}
if ($suricatacfg['eve_log_pgsql'] == 'on' && $suricatacfg['pgsql_parser'] == 'yes') {
$eve_out_types .= "\n - pgsql";
}
if ($suricatacfg['eve_log_quic'] == 'on') {
$eve_out_types .= "\n - quic";
}
if ($suricatacfg['eve_log_rdp'] == 'on') {
$eve_out_types .= "\n - rdp";
}
if ($suricatacfg['eve_log_rfb'] == 'on') {
$eve_out_types .= "\n - rfb";
}
if ($suricatacfg['eve_log_sip'] == 'on') {
$eve_out_types .= "\n - sip";
}
if ($suricatacfg['eve_log_smb'] == 'on') {
$eve_out_types .= "\n - smb";
}
if ($suricatacfg['eve_log_smtp'] == 'on') {
$eve_out_types .= "\n - smtp:";
if ($suricatacfg['eve_log_smtp_extended'] == 'on')
$eve_out_types .= "\n extended: yes";
else
$eve_out_types .= "\n extended: no";
if($suricatacfg['eve_log_smtp_extended_fields'] != "")
$eve_out_types .= "\n custom: [".$suricatacfg['eve_log_smtp_extended_fields']."]";
$eve_out_types .= "\n md5: [subject]";
}
if ($suricatacfg['eve_log_snmp'] == 'on') {
$eve_out_types .= "\n - snmp";
}
if ($suricatacfg['eve_log_ssh'] == 'on') {
$eve_out_types .= "\n - ssh";
}
if ($suricatacfg['eve_log_tftp'] == 'on') {
$eve_out_types .= "\n - tftp";
}
if ($suricatacfg['eve_log_stats'] == 'on'){
$eve_out_types .= "\n - stats:";
$eve_out_types .= "\n totals: ".($suricatacfg['eve_log_stats_totals'] == 'on'?'yes':'no');
$eve_out_types .= "\n deltas: ".($suricatacfg['eve_log_stats_deltas'] == 'on'?'yes':'no');
$eve_out_types .= "\n threads: ".($suricatacfg['eve_log_stats_threads'] == 'on'?'yes':'no');
}
if ($suricatacfg['eve_log_flow'] == 'on') {
$eve_out_types .= "\n - flow # Bi-directional flows";
}
if ($suricatacfg['eve_log_netflow'] == 'on') {
$eve_out_types .= "\n - netflow # Uni-directional flows";
}
// Add interface-specific IP defrag settings
if (!empty($suricatacfg['frag_memcap']))
$frag_memcap = $suricatacfg['frag_memcap'];
else
$frag_memcap = "33554432";
if (!empty($suricatacfg['defrag_memcap_policy']))
$defrag_memcap_policy = $suricatacfg['defrag_memcap_policy'];
else
$defrag_memcap_policy = "ignore";
if (!empty($suricatacfg['ip_max_trackers']))
$ip_max_trackers = $suricatacfg['ip_max_trackers'];
else
$ip_max_trackers = "65535";
if (!empty($suricatacfg['ip_max_frags']))
$ip_max_frags = $suricatacfg['ip_max_frags'];
else
$ip_max_frags = "65535";
if (!empty($suricatacfg['frag_hash_size']))
$frag_hash_size = $suricatacfg['frag_hash_size'];
else
$frag_hash_size = "65536";
if (!empty($suricatacfg['ip_frag_timeout']))
$ip_frag_timeout = $suricatacfg['ip_frag_timeout'];
else
$ip_frag_timeout = "60";
// Add interface-specific flow manager setttings
if (!empty($suricatacfg['flow_memcap']))
$flow_memcap = $suricatacfg['flow_memcap'];
else
$flow_memcap = "134217728";
if (!empty($suricatacfg['flow_memcap_policy']))
$flow_memcap_policy = $suricatacfg['flow_memcap_policy'];
else
$flow_memcap_policy = "ignore";
if (!empty($suricatacfg['flow_hash_size']))
$flow_hash_size = $suricatacfg['flow_hash_size'];
else
$flow_hash_size = "65536";
if (!empty($suricatacfg['flow_prealloc']))
$flow_prealloc = $suricatacfg['flow_prealloc'];
else
$flow_prealloc = "10000";
if (!empty($suricatacfg['flow_emerg_recovery']))
$flow_emerg_recovery = $suricatacfg['flow_emerg_recovery'];
else
$flow_emerg_recovery = "30";
if (!empty($suricatacfg['flow_prune']))
$flow_prune = $suricatacfg['flow_prune'];
else
$flow_prune = "5";
// Add interface-specific flow timeout setttings
if (!empty($suricatacfg['flow_tcp_new_timeout']))
$flow_tcp_new_timeout = $suricatacfg['flow_tcp_new_timeout'];
else
$flow_tcp_new_timeout = "60";
if (!empty($suricatacfg['flow_tcp_established_timeout']))
$flow_tcp_established_timeout = $suricatacfg['flow_tcp_established_timeout'];
else
$flow_tcp_established_timeout = "3600";
if (!empty($suricatacfg['flow_tcp_closed_timeout']))
$flow_tcp_closed_timeout = $suricatacfg['flow_tcp_closed_timeout'];
else
$flow_tcp_closed_timeout = "120";
if (!empty($suricatacfg['flow_tcp_emerg_new_timeout']))
$flow_tcp_emerg_new_timeout = $suricatacfg['flow_tcp_emerg_new_timeout'];
else
$flow_tcp_emerg_new_timeout = "10";
if (!empty($suricatacfg['flow_tcp_emerg_established_timeout']))
$flow_tcp_emerg_established_timeout = $suricatacfg['flow_tcp_emerg_established_timeout'];
else
$flow_tcp_emerg_established_timeout = "300";
if (!empty($suricatacfg['flow_tcp_emerg_closed_timeout']))
$flow_tcp_emerg_closed_timeout = $suricatacfg['flow_tcp_emerg_closed_timeout'];
else
$flow_tcp_emerg_closed_timeout = "20";
if (!empty($suricatacfg['flow_udp_new_timeout']))
$flow_udp_new_timeout = $suricatacfg['flow_udp_new_timeout'];
else
$flow_udp_new_timeout = "30";
if (!empty($suricatacfg['flow_udp_established_timeout']))
$flow_udp_established_timeout = $suricatacfg['flow_udp_established_timeout'];
else
$flow_udp_established_timeout = "300";
if (!empty($suricatacfg['flow_udp_emerg_new_timeout']))
$flow_udp_emerg_new_timeout = $suricatacfg['flow_udp_emerg_new_timeout'];
else
$flow_udp_emerg_new_timeout = "10";
if (!empty($suricatacfg['flow_udp_emerg_established_timeout']))
$flow_udp_emerg_established_timeout = $suricatacfg['flow_udp_emerg_established_timeout'];
else
$flow_udp_emerg_established_timeout = "100";
if (!empty($suricatacfg['flow_icmp_new_timeout']))
$flow_icmp_new_timeout = $suricatacfg['flow_icmp_new_timeout'];
else
$flow_icmp_new_timeout = "30";
if (!empty($suricatacfg['flow_icmp_established_timeout']))
$flow_icmp_established_timeout = $suricatacfg['flow_icmp_established_timeout'];
else
$flow_icmp_established_timeout = "300";
if (!empty($suricatacfg['flow_icmp_emerg_new_timeout']))
$flow_icmp_emerg_new_timeout = $suricatacfg['flow_icmp_emerg_new_timeout'];
else
$flow_icmp_emerg_new_timeout = "10";
if (!empty($suricatacfg['flow_icmp_emerg_established_timeout']))
$flow_icmp_emerg_established_timeout = $suricatacfg['flow_icmp_emerg_established_timeout'];
else
$flow_icmp_emerg_established_timeout = "100";
// Add interface-specific stream settings
if (!empty($suricatacfg['stream_memcap']))
$stream_memcap = $suricatacfg['stream_memcap'];
else
$stream_memcap = "268435456";
if (!empty($suricatacfg['stream_memcap_policy']))
$stream_memcap_policy = $suricatacfg['stream_memcap_policy'];
else
$stream_memcap_policy = "ignore";
if (!empty($suricatacfg['stream_prealloc_sessions']))
$stream_prealloc_sessions = $suricatacfg['stream_prealloc_sessions'];
else
$stream_prealloc_sessions = "32768";
if (!empty($suricatacfg['reassembly_memcap']))
$reassembly_memcap = $suricatacfg['reassembly_memcap'];
else
$reassembly_memcap = "131217728";
if (!empty($suricatacfg['reassembly_memcap_policy']))
$reassembly_memcap_policy = $suricatacfg['reassembly_memcap_policy'];
else
$reassembly_memcap_policy = "ignore";
if (!empty($suricatacfg['reassembly_depth']) || $suricatacfg['reassembly_depth'] == '0')
$reassembly_depth = $suricatacfg['reassembly_depth'];
else
$reassembly_depth = "1048576";
if (!empty($suricatacfg['reassembly_to_server_chunk']))
$reassembly_to_server_chunk = $suricatacfg['reassembly_to_server_chunk'];
else
$reassembly_to_server_chunk = "2560";
if (!empty($suricatacfg['reassembly_to_client_chunk']))
$reassembly_to_client_chunk = $suricatacfg['reassembly_to_client_chunk'];
else
$reassembly_to_client_chunk = "2560";
if (!empty($suricatacfg['max_synack_queued']))
$max_synack_queued = $suricatacfg['max_synack_queued'];
else
$max_synack_queued = "5";
if ($suricatacfg['enable_midstream_sessions'] == 'on')
$stream_enable_midstream = "true";
else
$stream_enable_midstream = "false";
if (!empty($suricatacfg['midstream_policy']))
$midstream_policy = $suricatacfg['midstream_policy'];
else
$midstream_policy = "ignore";
if ($suricatacfg['stream_checksum_validation'] == 'on')
$stream_checksum_validation = "yes";
else
$stream_checksum_validation = "no";
if ($suricatacfg['enable_async_sessions'] == 'on')
$stream_enable_async = "true";
else
$stream_enable_async = "false";
if ($suricatacfg['stream_bypass'] == 'on' || $suricatacfg['tls_encrypt_handling'] == 'bypass')
$stream_bypass_enable = "yes";
else
$stream_bypass_enable = "no";
if ($suricatacfg['stream_drop_invalid'] == 'on')
$stream_drop_invalid_enable = "yes";
else
$stream_drop_invalid_enable = "no";
// Add the OS-specific host policies if configured, otherwise
// just set default to BSD for all networks.
$host_os_policy = "";
if (!is_array($suricatacfg['host_os_policy']))
$suricatacfg['host_os_policy'] = array();
if (!is_array($suricatacfg['host_os_policy']['item']))
$suricatacfg['host_os_policy']['item'] = array();
if (count($suricatacfg['host_os_policy']['item']) < 1)
$host_os_policy = "bsd: [0.0.0.0/0]";
else {
foreach ($suricatacfg['host_os_policy']['item'] as $k => $v) {
$engine = "{$v['policy']}: ";
if ($v['bind_to'] <> "all") {
$tmp = trim(filter_expand_alias($v['bind_to']));
if (!empty($tmp)) {
$engine .= "[";
$tmp = preg_replace('/\s+/', ',', $tmp);
$list = explode(',', $tmp);
foreach ($list as $addr) {
if (is_ipaddrv6($addr) || is_subnetv6($addr))
$engine .= "\"{$addr}\", ";
elseif (is_ipaddrv4($addr) || is_subnetv4($addr))
$engine .= "{$addr}, ";
else
syslog(LOG_WARNING, "[suricata] WARNING: invalid IP address value '{$addr}' in Alias {$v['bind_to']} will be ignored.");
}
$engine = trim($engine, ' ,');
$engine .= "]";
}
else {
syslog(LOG_WARNING, "[suricata] WARNING: unable to resolve IP List Alias '{$v['bind_to']}' for Host OS Policy '{$v['name']}' ... ignoring this entry.");
continue;
}
}
else
$engine .= "[0.0.0.0/0]";
$host_os_policy .= " {$engine}\n";
}
// Remove trailing newline
$host_os_policy = trim($host_os_policy);
}
// Add the HTTP Server-specific policies if configured, otherwise
// just set default to IDS for all networks.
$http_hosts_policy = "";
$http_hosts_default_policy = "";
if (!is_array($suricatacfg['libhtp_policy']))
$suricatacfg['libhtp_policy'] = array();
if (!is_array($suricatacfg['libhtp_policy']['item']))
$suricatacfg['libhtp_policy']['item'] = array();
if (count($suricatacfg['libhtp_policy']['item']) < 1) {
$http_hosts_default_policy = "personality: IDS\n request-body-limit: 4096\n response-body-limit: 4096\n";
$http_hosts_default_policy .= " double-decode-path: no\n double-decode-query: no\n uri-include-all: no\n";
}
else {
foreach ($suricatacfg['libhtp_policy']['item'] as $k => $v) {
if ($v['bind_to'] <> "all") {
$engine = "server-config:\n - {$v['name']}:\n";
$tmp = trim(filter_expand_alias($v['bind_to']));
if (!empty($tmp)) {
$engine .= " address: [";
$tmp = preg_replace('/\s+/', ',', $tmp);
$list = explode(',', $tmp);
foreach ($list as $addr) {
if (is_ipaddrv6($addr) || is_subnetv6($addr))
$engine .= "\"{$addr}\", ";
elseif (is_ipaddrv4($addr) || is_subnetv4($addr))
$engine .= "{$addr}, ";
else {
syslog(LOG_WARNING, "[suricata] WARNING: invalid IP address value '{$addr}' in Alias {$v['bind_to']} will be ignored.");
continue;
}
}
$engine = trim($engine, ' ,');
$engine .= "]\n";
$engine .= " personality: {$v['personality']}\n request-body-limit: {$v['request-body-limit']}\n";
$engine .= " response-body-limit: {$v['response-body-limit']}\n";
$engine .= " meta-field-limit: " . (isset($v['meta-field-limit']) ? $v['meta-field-limit'] : "18432") . "\n";
$engine .= " double-decode-path: {$v['double-decode-path']}\n";
$engine .= " double-decode-query: {$v['double-decode-query']}\n";
$engine .= " uri-include-all: {$v['uri-include-all']}\n";
$http_hosts_policy .= " {$engine}\n";
}
else {
syslog(LOG_WARNING, "[suricata] WARNING: unable to resolve IP List Alias '{$v['bind_to']}' for Host OS Policy '{$v['name']}' ... ignoring this entry.");
continue;
}
}
else {
$http_hosts_default_policy = "personality: {$v['personality']}\n request-body-limit: {$v['request-body-limit']}\n";
$http_hosts_default_policy .= " response-body-limit: {$v['response-body-limit']}\n";
$http_hosts_default_policy .= " meta-field-limit: " . (isset($v['meta-field-limit']) ? $v['meta-field-limit'] : "18432") . "\n";
$http_hosts_default_policy .= " double-decode-path: {$v['double-decode-path']}\n";
$http_hosts_default_policy .= " double-decode-query: {$v['double-decode-query']}\n";
$http_hosts_default_policy .= " uri-include-all: {$v['uri-include-all']}\n";
}
}
// Remove any leading or trailing spaces and newline
$http_hosts_default_policy = trim($http_hosts_default_policy);
$http_hosts_policy = trim($http_hosts_policy);
}
// Configure ASN1 max frames value
if (!empty($suricatacfg['asn1_max_frames']))
$asn1_max_frames = $suricatacfg['asn1_max_frames'];
else
$asn1_max_frames = "256";
// Configure App-Layer Parsers/Detection
if (!empty($suricatacfg['app_layer_error_policy']))
$app_layer_error_policy = $suricatacfg['app_layer_error_policy'];
else
$app_layer_error_policy = "ignore";
if (!empty($suricatacfg['bittorrent_parser']))
$bittorrent_parser = $suricatacfg['bittorrent_parser'];
else
$bittorrent_parser = "no";
if (!empty($suricatacfg['dcerpc_parser']))
$dcerpc_parser = $suricatacfg['dcerpc_parser'];
else
$dcerpc_parser = "yes";
if (!empty($suricatacfg['dhcp_parser']))
$dhcp_parser = $suricatacfg['dhcp_parser'];
else
$dhcp_parser = "yes";
/* DNS Parser */
if (!empty($suricatacfg['dns_parser_tcp']))
$dns_parser_tcp = $suricatacfg['dns_parser_tcp'];
else
$dns_parser_tcp = "yes";
if (!empty($suricatacfg['dns_parser_udp']))
$dns_parser_udp = $suricatacfg['dns_parser_udp'];
else
$dns_parser_udp = "yes";
if (!empty($suricatacfg['dns_parser_udp_ports'])) {
if (is_alias($suricatacfg['dns_parser_udp_ports'])) {
$dns_parser_udp_port = trim(filter_expand_alias($suricatacfg['dns_parser_udp_ports']));
$dns_parser_udp_port = preg_replace('/\s+/', ', ', trim($dns_parser_udp_port));
}
else {
$dns_parser_udp_port = $suricatacfg['dns_parser_udp_ports'];
}