base/init-bare.zeek¶

BinPAC¶

Cluster¶

DCE_RPC¶

DHCP¶

GLOBAL¶

JSON¶

KRB¶

MOUNT3¶

MQTT¶

NCP¶

NFS3¶

NTLM¶

NTP¶

PE¶

Pcap¶

RADIUS¶

RDP¶

Reporter¶

SMB¶

SMB1¶

SMB2¶

SNMP¶

SOCKS¶

SSH¶

SSL¶

TCP¶

Threading¶

Tunnel¶

Unified2¶

UnknownProtocol¶

Weird¶

X509¶

Namespaces: BinPAC, Cluster, DCE_RPC, DHCP, GLOBAL, JSON, KRB, MOUNT3, MQTT, NCP, NFS3, NTLM, NTP, PE, Pcap, RADIUS, RDP, Reporter, SMB, SMB1, SMB2, SNMP, SOCKS, SSH, SSL, TCP, Threading, Tunnel, Unified2, UnknownProtocol, Weird, X509
Imports: base/bif/CPP-load.bif.zeek, base/bif/const.bif.zeek, base/bif/event.bif.zeek, base/bif/option.bif.zeek, base/bif/packet_analysis.bif.zeek, base/bif/plugins/Zeek_KRB.types.bif.zeek, base/bif/plugins/Zeek_SNMP.types.bif.zeek, base/bif/reporter.bif.zeek, base/bif/stats.bif.zeek, base/bif/strings.bif.zeek, base/bif/supervisor.bif.zeek, base/bif/types.bif.zeek, base/bif/zeek.bif.zeek, base/frameworks/supervisor/api.zeek, base/packet-protocols

Summary¶

Runtime Options¶

`MQTT::max_payload_size`: `count` `&redef`	The maximum payload size to allocate for the purpose of payload information in `mqtt_publish` events (and the default MQTT logs generated from that).
`Weird::sampling_duration`: `interval` `&redef`	How long a weird of a given type is allowed to keep state/counters in memory.
`Weird::sampling_global_list`: `set` `&redef`	Rate-limits weird names in the table globally instead of per connection/flow.
`Weird::sampling_rate`: `count` `&redef`	The rate-limiting sampling rate.
`Weird::sampling_threshold`: `count` `&redef`	How many weirds of a given type to tolerate before sampling begins.
`Weird::sampling_whitelist`: `set` `&redef`	Prevents rate-limiting sampling of any weirds named in the table.
`default_file_bof_buffer_size`: `count` `&redef`	Default amount of bytes that file analysis will buffer in order to use for mime type matching.
`default_file_timeout_interval`: `interval` `&redef`	Default amount of time a file can be inactive before the file analysis gives up and discards any internal state related to the file.
`ignore_checksums_nets`: `set` `&redef`	Checksums are ignored for all packets with a src address within this set of networks.
`udp_content_delivery_ports_use_resp`: `bool` `&redef`	Whether ports given in `udp_content_delivery_ports_orig` and `udp_content_delivery_ports_resp` are in terms of UDP packet’s destination port or the UDP connection’s “responder” port.
`udp_content_ports`: `set` `&redef`	Defines UDP ports (source or destination) for which the contents of either originator or responder streams should be delivered via `udp_contents`.

Redefinable Options¶

`BinPAC::flowbuffer_capacity_max`: `count` `&redef`	Maximum capacity, in bytes, that the BinPAC flowbuffer is allowed to grow to for use with incremental parsing of a given connection/analyzer.
`BinPAC::flowbuffer_capacity_min`: `count` `&redef`	The initial capacity, in bytes, that will be allocated to the BinPAC flowbuffer of a given connection/analyzer.
`BinPAC::flowbuffer_contract_threshold`: `count` `&redef`	The threshold, in bytes, at which the BinPAC flowbuffer of a given connection/analyzer will have its capacity contracted to `BinPAC::flowbuffer_capacity_min` after parsing a full unit.
`DCE_RPC::max_cmd_reassembly`: `count` `&redef`	The maximum number of simultaneous fragmented commands that the DCE_RPC analyzer will tolerate before the it will generate a weird and skip further input.
`DCE_RPC::max_frag_data`: `count` `&redef`	The maximum number of fragmented bytes that the DCE_RPC analyzer will tolerate on a command before the analyzer will generate a weird and skip further input.
`KRB::keytab`: `string` `&redef`	Kerberos keytab file name.
`NCP::max_frame_size`: `count` `&redef`	The maximum number of bytes to allocate when parsing NCP frames.
`NFS3::return_data`: `bool` `&redef`	If true, `nfs_proc_read` and `nfs_proc_write` events return the file data that has been read/written.
`NFS3::return_data_first_only`: `bool` `&redef`	If `NFS3::return_data` is true, whether to only return data if the read or write offset is 0, i.e., only return data for the beginning of the file.
`NFS3::return_data_max`: `count` `&redef`	If `NFS3::return_data` is true, how much data should be returned at most.
`Pcap::bufsize`: `count` `&redef`	Number of Mbytes to provide as buffer space when capturing from live interfaces.
`Pcap::snaplen`: `count` `&redef`	Number of bytes per packet to capture from live interfaces.
`Reporter::errors_to_stderr`: `bool` `&redef`	Tunable for sending reporter error messages to STDERR.
`Reporter::info_to_stderr`: `bool` `&redef`	Tunable for sending reporter info messages to STDERR.
`Reporter::warnings_to_stderr`: `bool` `&redef`	Tunable for sending reporter warning messages to STDERR.
`SMB::pipe_filenames`: `set` `&redef`	A set of file names used as named pipes over SMB.
`SSL::dtls_max_reported_version_errors`: `count` `&redef`	Maximum number of invalid version errors to report in one DTLS connection.
`SSL::dtls_max_version_errors`: `count` `&redef`	Number of non-DTLS frames that can occur in a DTLS connection before parsing of the connection is suspended.
`Threading::heartbeat_interval`: `interval` `&redef`	The heartbeat interval used by the threading framework.
`Tunnel::delay_gtp_confirmation`: `bool` `&redef`	With this set, the GTP analyzer waits until the most-recent upflow and downflow packets are a valid GTPv1 encapsulation before issuing `protocol_confirmation`.
`Tunnel::delay_teredo_confirmation`: `bool` `&redef`	With this set, the Teredo analyzer waits until it sees both sides of a connection using a valid Teredo encapsulation before issuing a `protocol_confirmation`.
`Tunnel::enable_ayiya`: `bool` `&redef`	Toggle whether to do IPv{4,6}-in-AYIYA decapsulation.
`Tunnel::enable_gre`: `bool` `&redef`	Toggle whether to do GRE decapsulation.
`Tunnel::enable_gtpv1`: `bool` `&redef`	Toggle whether to do GTPv1 decapsulation.
`Tunnel::enable_ip`: `bool` `&redef`	Toggle whether to do IPv{4,6}-in-IPv{4,6} decapsulation.
`Tunnel::enable_teredo`: `bool` `&redef`	Toggle whether to do IPv6-in-Teredo decapsulation.
`Tunnel::geneve_ports`: `set` `&redef`	The set of UDP ports used for Geneve traffic.
`Tunnel::ip_tunnel_timeout`: `interval` `&redef`	How often to cleanup internal state for inactive IP tunnels (includes GRE tunnels).
`Tunnel::max_depth`: `count` `&redef`	The maximum depth of a tunnel to decapsulate until giving up.
`Tunnel::validate_vxlan_checksums`: `bool` `&redef`	Whether to validate the checksum supplied in the outer UDP header of a VXLAN encapsulation.
`Tunnel::vxlan_ports`: `set` `&redef`	The set of UDP ports used for VXLAN traffic.
`UnknownProtocol::first_bytes_count`: `count` `&redef`	The number of bytes to extract from the next header and log in the first bytes field.
`UnknownProtocol::sampling_duration`: `interval` `&redef`	How long an analyzer/protocol pair is allowed to keep state/counters in in memory.
`UnknownProtocol::sampling_rate`: `count` `&redef`	The rate-limiting sampling rate.
`UnknownProtocol::sampling_threshold`: `count` `&redef`	How many reports for an analyzer/protocol pair will be allowed to raise events before becoming rate-limited.
`bits_per_uid`: `count` `&redef`	Number of bits in UIDs that are generated to identify connections and files.
`check_for_unused_event_handlers`: `bool` `&redef`	If true, warns about unused event handlers at startup.
`cmd_line_bpf_filter`: `string` `&redef`	BPF filter the user has set via the -f command line options.
`detect_filtered_trace`: `bool` `&redef`	Whether to attempt to automatically detect SYN/FIN/RST-filtered trace and not report missing segments for such connections.
`digest_salt`: `string` `&redef`	This salt value is used for several message digests in Zeek.
`dns_session_timeout`: `interval` `&redef`	Time to wait before timing out a DNS request.
`dpd_buffer_size`: `count` `&redef`	Size of per-connection buffer used for dynamic protocol detection.
`dpd_ignore_ports`: `bool` `&redef`	If true, don’t consider any ports for deciding which protocol analyzer to use.
`dpd_late_match_stop`: `bool` `&redef`	If true, stops signature matching after a late match.
`dpd_match_only_beginning`: `bool` `&redef`	If true, stops signature matching if `dpd_buffer_size` has been reached.
`dpd_reassemble_first_packets`: `bool` `&redef`	Reassemble the beginning of all TCP connections before doing signature matching.
`exit_only_after_terminate`: `bool` `&redef`	Flag to prevent Zeek from exiting automatically when input is exhausted.
`expensive_profiling_multiple`: `count` `&redef`	Multiples of `profiling_interval` at which (more expensive) memory profiling is done (0 disables).
`frag_timeout`: `interval` `&redef`	How long to hold onto fragments for possible reassembly.
`global_hash_seed`: `string` `&redef`	Seed for hashes computed internally for probabilistic data structures.
`icmp_inactivity_timeout`: `interval` `&redef`	If an ICMP flow is inactive, time it out after this interval.
`ignore_checksums`: `bool` `&redef`	If true, don’t verify checksums.
`ignore_keep_alive_rexmit`: `bool` `&redef`	Ignore certain TCP retransmissions for `conn_stats`.
`likely_server_ports`: `set` `&redef`	Ports which the core considers being likely used by servers.
`log_rotate_base_time`: `string` `&redef`	Base time of log rotations in 24-hour time format (`%H:%M`), e.g.
`max_timer_expires`: `count` `&redef`	The maximum number of timers to expire after processing each new packet.
`mmdb_dir`: `string` `&redef`	The directory containing MaxMind DB (.mmdb) files to use for GeoIP support.
`non_analyzed_lifetime`: `interval` `&redef`	If a connection belongs to an application that we don’t analyze, time it out after this interval.
`packet_filter_default`: `bool` `&redef`	Default mode for Zeek’s user-space dynamic packet filter.
`partial_connection_ok`: `bool` `&redef`	If true, instantiate connection state when a partial connection (one missing its initial establishment negotiation) is seen.
`peer_description`: `string` `&redef`	Description transmitted to remote communication peers for identification.
`pkt_profile_freq`: `double` `&redef`	Frequency associated with packet profiling.
`pkt_profile_mode`: `pkt_profile_modes` `&redef`	Output mode for packet profiling information.
`profiling_interval`: `interval` `&redef`	Update interval for profiling (0 disables).
`record_all_packets`: `bool` `&redef`	If a trace file is given with `-w`, dump all packets seen by Zeek into it.
`report_gaps_for_partial`: `bool` `&redef`	Whether we want `content_gap` for partial connections.
`rpc_timeout`: `interval` `&redef`	Time to wait before timing out an RPC request.
`segment_profiling`: `bool` `&redef`	If true, then write segment profiling information (very high volume!) in addition to profiling statistics.
`sig_max_group_size`: `count` `&redef`	Maximum size of regular expression groups for signature matching.
`skip_http_data`: `bool` `&redef`	Skip HTTP data for performance considerations.
`table_expire_delay`: `interval` `&redef`	When expiring table entries, wait this amount of time before checking the next chunk of entries.
`table_expire_interval`: `interval` `&redef`	Check for expired table entries after this amount of time.
`table_incremental_step`: `count` `&redef`	When expiring/serializing table entries, don’t work on more than this many table entries at a time.
`tcp_SYN_ack_ok`: `bool` `&redef`	If true, instantiate connection state when a SYN/ACK is seen but not the initial SYN (even if `partial_connection_ok` is false).
`tcp_SYN_timeout`: `interval` `&redef`	Check up on the result of an initial SYN after this much time.
`tcp_attempt_delay`: `interval` `&redef`	Wait this long upon seeing an initial SYN before timing out the connection attempt.
`tcp_close_delay`: `interval` `&redef`	Upon seeing a normal connection close, flush state after this much time.
`tcp_connection_linger`: `interval` `&redef`	When checking a closed connection for further activity, consider it inactive if there hasn’t been any for this long.
`tcp_content_deliver_all_orig`: `bool` `&redef`	If true, all TCP originator-side traffic is reported via `tcp_contents`.
`tcp_content_deliver_all_resp`: `bool` `&redef`	If true, all TCP responder-side traffic is reported via `tcp_contents`.
`tcp_content_delivery_ports_orig`: `table` `&redef`	Defines destination TCP ports for which the contents of the originator stream should be delivered via `tcp_contents`.
`tcp_content_delivery_ports_resp`: `table` `&redef`	Defines destination TCP ports for which the contents of the responder stream should be delivered via `tcp_contents`.
`tcp_excessive_data_without_further_acks`: `count` `&redef`	If we’ve seen this much data without any of it being acked, we give up on that connection to avoid memory exhaustion due to buffering all that stuff.
`tcp_inactivity_timeout`: `interval` `&redef`	If a TCP connection is inactive, time it out after this interval.
`tcp_match_undelivered`: `bool` `&redef`	If true, pass any undelivered to the signature engine before flushing the state.
`tcp_max_above_hole_without_any_acks`: `count` `&redef`	If we’re not seeing our peer’s ACKs, the maximum volume of data above a sequence hole that we’ll tolerate before assuming that there’s been a packet drop and we should give up on tracking a connection.
`tcp_max_initial_window`: `count` `&redef`	Maximum amount of data that might plausibly be sent in an initial flight (prior to receiving any acks).
`tcp_max_old_segments`: `count` `&redef`	Number of TCP segments to buffer beyond what’s been acknowledged already to detect retransmission inconsistencies.
`tcp_partial_close_delay`: `interval` `&redef`	Generate a `connection_partial_close` event this much time after one half of a partial connection closes, assuming there has been no subsequent activity.
`tcp_reassembler_ports_orig`: `set` `&redef`	For services without a handler, these sets define originator-side ports that still trigger reassembly.
`tcp_reassembler_ports_resp`: `set` `&redef`	For services without a handler, these sets define responder-side ports that still trigger reassembly.
`tcp_reset_delay`: `interval` `&redef`	Upon seeing a RST, flush state after this much time.
`tcp_session_timer`: `interval` `&redef`	After a connection has closed, wait this long for further activity before checking whether to time out its state.
`tcp_storm_interarrival_thresh`: `interval` `&redef`	FINs/RSTs must come with this much time or less between them to be considered a “storm”.
`tcp_storm_thresh`: `count` `&redef`	Number of FINs/RSTs in a row that constitute a “storm”.
`time_machine_profiling`: `bool` `&redef`	If true, output profiling for Time-Machine queries.
`timer_mgr_inactivity_timeout`: `interval` `&redef`	Per-incident timer managers are drained after this amount of inactivity.
`truncate_http_URI`: `int` `&redef`	Maximum length of HTTP URIs passed to events.
`udp_content_deliver_all_orig`: `bool` `&redef`	If true, all UDP originator-side traffic is reported via `udp_contents`.
`udp_content_deliver_all_resp`: `bool` `&redef`	If true, all UDP responder-side traffic is reported via `udp_contents`.
`udp_content_delivery_ports_orig`: `table` `&redef`	Defines UDP destination ports for which the contents of the originator stream should be delivered via `udp_contents`.
`udp_content_delivery_ports_resp`: `table` `&redef`	Defines UDP destination ports for which the contents of the responder stream should be delivered via `udp_contents`.
`udp_inactivity_timeout`: `interval` `&redef`	If a UDP flow is inactive, time it out after this interval.
`use_conn_size_analyzer`: `bool` `&redef`	Whether to use the `ConnSize` analyzer to count the number of packets and IP-level bytes transferred by each endpoint.
`watchdog_interval`: `interval` `&redef`	Zeek’s watchdog interval.

Constants¶

`CONTENTS_BOTH`: `count`	Record both originator and responder contents.
`CONTENTS_NONE`: `count`	Turn off recording of contents.
`CONTENTS_ORIG`: `count`	Record originator contents.
`CONTENTS_RESP`: `count`	Record responder contents.
`DNS_ADDL`: `count`	An additional record.
`DNS_ANS`: `count`	An answer record.
`DNS_AUTH`: `count`	An authoritative record.
`DNS_QUERY`: `count`	A query.
`ENDIAN_BIG`: `count`	Big endian.
`ENDIAN_CONFUSED`: `count`	Tried to determine endian, but failed.
`ENDIAN_LITTLE`: `count`	Little endian.
`ENDIAN_UNKNOWN`: `count`	Endian not yet determined.
`ICMP_UNREACH_ADMIN_PROHIB`: `count`	Administratively prohibited.
`ICMP_UNREACH_HOST`: `count`	Host unreachable.
`ICMP_UNREACH_NEEDFRAG`: `count`	Fragment needed.
`ICMP_UNREACH_NET`: `count`	Network unreachable.
`ICMP_UNREACH_PORT`: `count`	Port unreachable.
`ICMP_UNREACH_PROTOCOL`: `count`	Protocol unreachable.
`IPPROTO_AH`: `count`	IPv6 authentication header.
`IPPROTO_DSTOPTS`: `count`	IPv6 destination options header.
`IPPROTO_ESP`: `count`	IPv6 encapsulating security payload header.
`IPPROTO_FRAGMENT`: `count`	IPv6 fragment header.
`IPPROTO_HOPOPTS`: `count`	IPv6 hop-by-hop-options header.
`IPPROTO_ICMP`: `count`	Control message protocol.
`IPPROTO_ICMPV6`: `count`	ICMP for IPv6.
`IPPROTO_IGMP`: `count`	Group management protocol.
`IPPROTO_IP`: `count`	Dummy for IP.
`IPPROTO_IPIP`: `count`	IP encapsulation in IP.
`IPPROTO_IPV6`: `count`	IPv6 header.
`IPPROTO_MOBILITY`: `count`	IPv6 mobility header.
`IPPROTO_NONE`: `count`	IPv6 no next header.
`IPPROTO_RAW`: `count`	Raw IP packet.
`IPPROTO_ROUTING`: `count`	IPv6 routing header.
`IPPROTO_TCP`: `count`	TCP.
`IPPROTO_UDP`: `count`	User datagram protocol.
`LOGIN_STATE_AUTHENTICATE`: `count`
`LOGIN_STATE_CONFUSED`: `count`
`LOGIN_STATE_LOGGED_IN`: `count`
`LOGIN_STATE_SKIP`: `count`
`RPC_status`: `table`	Mapping of numerical RPC status codes to readable messages.
`SNMP::OBJ_COUNTER32_TAG`: `count`	Unsigned 32-bit integer.
`SNMP::OBJ_COUNTER64_TAG`: `count`	Unsigned 64-bit integer.
`SNMP::OBJ_ENDOFMIBVIEW_TAG`: `count`	A NULL value.
`SNMP::OBJ_INTEGER_TAG`: `count`	Signed 64-bit integer.
`SNMP::OBJ_IPADDRESS_TAG`: `count`	An IP address.
`SNMP::OBJ_NOSUCHINSTANCE_TAG`: `count`	A NULL value.
`SNMP::OBJ_NOSUCHOBJECT_TAG`: `count`	A NULL value.
`SNMP::OBJ_OCTETSTRING_TAG`: `count`	An octet string.
`SNMP::OBJ_OID_TAG`: `count`	An Object Identifier.
`SNMP::OBJ_OPAQUE_TAG`: `count`	An octet string.
`SNMP::OBJ_TIMETICKS_TAG`: `count`	Unsigned 32-bit integer.
`SNMP::OBJ_UNSIGNED32_TAG`: `count`	Unsigned 32-bit integer.
`SNMP::OBJ_UNSPECIFIED_TAG`: `count`	A NULL value.
`TCP_CLOSED`: `count`	Endpoint has closed connection.
`TCP_ESTABLISHED`: `count`	Endpoint has finished initial handshake regularly.
`TCP_INACTIVE`: `count`	Endpoint is still inactive.
`TCP_PARTIAL`: `count`	Endpoint has sent data but no initial SYN.
`TCP_RESET`: `count`	Endpoint has sent RST.
`TCP_SYN_ACK_SENT`: `count`	Endpoint has sent SYN/ACK.
`TCP_SYN_SENT`: `count`	Endpoint has sent SYN.
`TH_ACK`: `count`	ACK.
`TH_FIN`: `count`	FIN.
`TH_FLAGS`: `count`	Mask combining all flags.
`TH_PUSH`: `count`	PUSH.
`TH_RST`: `count`	RST.
`TH_SYN`: `count`	SYN.
`TH_URG`: `count`	URG.
`UDP_ACTIVE`: `count`	Endpoint has sent something.
`UDP_INACTIVE`: `count`	Endpoint is still inactive.
`trace_output_file`: `string`	Holds the filename of the trace file given with `-w` (empty if none).
`zeek_script_args`: `vector`	Arguments given to Zeek from the command line.

State Variables¶

`capture_filters`: `table` `&redef`	Set of BPF capture filters to use for capturing, indexed by a user-definable ID (which must be unique).
`direct_login_prompts`: `set` `&redef`	TODO.
`discarder_maxlen`: `count` `&redef`	Maximum length of payload passed to discarder functions.
`dns_max_queries`: `count` `&redef`	If a DNS request includes more than this many queries, assume it’s non-DNS traffic and do not process it.
`dns_skip_addl`: `set` `&redef`	For DNS servers in these sets, omit processing the ADDL records they include in their replies.
`dns_skip_all_addl`: `bool` `&redef`	If true, all DNS ADDL records are skipped.
`dns_skip_all_auth`: `bool` `&redef`	If true, all DNS AUTH records are skipped.
`dns_skip_auth`: `set` `&redef`	For DNS servers in these sets, omit processing the AUTH records they include in their replies.
`done_with_network`: `bool`
`http_entity_data_delivery_size`: `count` `&redef`	Maximum number of HTTP entity data delivered to events.
`interfaces`: `string` `&add_func` = `add_interface` `&redef`	Network interfaces to listen on.
`load_sample_freq`: `count` `&redef`	Rate at which to generate `load_sample` events.
`login_failure_msgs`: `set` `&redef`	TODO.
`login_non_failure_msgs`: `set` `&redef`	TODO.
`login_prompts`: `set` `&redef`	TODO.
`login_success_msgs`: `set` `&redef`	TODO.
`login_timeouts`: `set` `&redef`	TODO.
`mime_segment_length`: `count` `&redef`	The length of MIME data segments delivered to handlers of `mime_segment_data`.
`mime_segment_overlap_length`: `count` `&redef`	The number of bytes of overlap between successive segments passed to `mime_segment_data`.
`pkt_profile_file`: `file` `&redef`	File where packet profiles are logged.
`profiling_file`: `file` `&redef`	Write profiling info into this file in regular intervals.
`restrict_filters`: `table` `&redef`	Set of BPF filters to restrict capturing, indexed by a user-definable ID (which must be unique).
`secondary_filters`: `table` `&redef`	Definition of “secondary filters”.
`signature_files`: `string` `&add_func` = `add_signature_file` `&redef`	Signature files to read.
`skip_authentication`: `set` `&redef`	TODO.

Types¶

`Backtrace`: `vector`	A representation of a Zeek script’s call stack.
`BacktraceElement`: `record`	A representation of an element in a Zeek script’s call stack.
`BrokerStats`: `record`	Statistics about Broker communication.
`Cluster::Pool`: `record`	A pool used for distributing data/work among a set of cluster nodes.
`ConnStats`: `record`
`DHCP::Addrs`: `vector`	A list of addresses offered by a DHCP server.
`DHCP::ClientFQDN`: `record`	DHCP Client FQDN Option information (Option 81)
`DHCP::ClientID`: `record`	DHCP Client Identifier (Option 61) ..
`DHCP::Msg`: `record`	A DHCP message.
`DHCP::Options`: `record`
`DHCP::SubOpt`: `record`	DHCP Relay Agent Information Option (Option 82) ..
`DHCP::SubOpts`: `vector`
`DNSStats`: `record`	Statistics related to Zeek’s active use of DNS.
`EncapsulatingConnVector`: `vector`	A type alias for a vector of encapsulating “connections”, i.e.
`EventStats`: `record`
`FileAnalysisStats`: `record`	Statistics of file analysis.
`GapStats`: `record`	Statistics about number of gaps in TCP connections.
`IPAddrAnonymization`: `enum`
`IPAddrAnonymizationClass`: `enum`
`JSON::TimestampFormat`: `enum`
`KRB::AP_Options`: `record`	AP Options.
`KRB::Error_Msg`: `record`	The data from the ERROR_MSG message.
`KRB::Host_Address`: `record`	A Kerberos host address See RFC 4120.
`KRB::Host_Address_Vector`: `vector`
`KRB::KDC_Options`: `record`	KDC Options.
`KRB::KDC_Request`: `record`	The data from the AS_REQ and TGS_REQ messages.
`KRB::KDC_Response`: `record`	The data from the AS_REQ and TGS_REQ messages.
`KRB::SAFE_Msg`: `record`	The data from the SAFE message.
`KRB::Ticket`: `record`	A Kerberos ticket.
`KRB::Ticket_Vector`: `vector`
`KRB::Type_Value`: `record`	Used in a few places in the Kerberos analyzer for elements that have a type and a string value.
`KRB::Type_Value_Vector`: `vector`
`MOUNT3::dirmntargs_t`: `record`	MOUNT mnt arguments.
`MOUNT3::info_t`: `record`	Record summarizing the general results and status of MOUNT3 request/reply pairs.
`MOUNT3::mnt_reply_t`: `record`	MOUNT lookup reply.
`MQTT::ConnectAckMsg`: `record`
`MQTT::ConnectMsg`: `record`
`MQTT::PublishMsg`: `record`
`MatcherStats`: `record`	Statistics of all regular expression matchers.
`ModbusCoils`: `vector`	A vector of boolean values that indicate the setting for a range of modbus coils.
`ModbusHeaders`: `record`
`ModbusRegisters`: `vector`	A vector of count values that represent 16bit modbus register values.
`NFS3::delobj_reply_t`: `record`	NFS reply for remove, rmdir.
`NFS3::direntry_t`: `record`	NFS direntry.
`NFS3::direntry_vec_t`: `vector`	Vector of NFS direntry.
`NFS3::diropargs_t`: `record`	NFS readdir arguments.
`NFS3::fattr_t`: `record`	NFS file attributes.
`NFS3::fsstat_t`: `record`	NFS fsstat.
`NFS3::info_t`: `record`	Record summarizing the general results and status of NFSv3 request/reply pairs.
`NFS3::link_reply_t`: `record`	NFS link reply.
`NFS3::linkargs_t`: `record`	NFS link arguments.
`NFS3::lookup_reply_t`: `record`	NFS lookup reply.
`NFS3::newobj_reply_t`: `record`	NFS reply for create, mkdir, and symlink.
`NFS3::read_reply_t`: `record`	NFS read reply.
`NFS3::readargs_t`: `record`	NFS read arguments.
`NFS3::readdir_reply_t`: `record`	NFS readdir reply.
`NFS3::readdirargs_t`: `record`	NFS readdir arguments.
`NFS3::readlink_reply_t`: `record`	NFS readline reply.
`NFS3::renameobj_reply_t`: `record`	NFS reply for rename.
`NFS3::renameopargs_t`: `record`	NFS rename arguments.
`NFS3::sattr_reply_t`: `record`	NFS sattr reply.
`NFS3::sattr_t`: `record`	NFS file attributes.
`NFS3::sattrargs_t`: `record`	NFS sattr arguments.
`NFS3::symlinkargs_t`: `record`	NFS symlink arguments.
`NFS3::symlinkdata_t`: `record`	NFS symlinkdata attributes.
`NFS3::wcc_attr_t`: `record`	NFS wcc attributes.
`NFS3::write_reply_t`: `record`	NFS write reply.
`NFS3::writeargs_t`: `record`	NFS write arguments.
`NTLM::AVs`: `record`
`NTLM::Authenticate`: `record`
`NTLM::Challenge`: `record`
`NTLM::Negotiate`: `record`
`NTLM::NegotiateFlags`: `record`
`NTLM::Version`: `record`
`NTP::ControlMessage`: `record`	NTP control message as defined in RFC 1119 for mode=6 This record contains the fields used by the NTP protocol for control operations.
`NTP::Message`: `record`	NTP message as defined in RFC 5905.
`NTP::Mode7Message`: `record`	NTP mode 7 message.
`NTP::StandardMessage`: `record`	NTP standard message as defined in RFC 5905 for modes 1-5 This record contains the standard fields used by the NTP protocol for standard syncronization operations.
`NetStats`: `record`	Packet capture statistics.
`PE::DOSHeader`: `record`
`PE::FileHeader`: `record`
`PE::OptionalHeader`: `record`
`PE::SectionHeader`: `record`	Record for Portable Executable (PE) section headers.
`PacketSource`: `record`	Properties of an I/O packet source being read by Zeek.
`Pcap::Interface`: `record`	The definition of a “pcap interface”.
`Pcap::Interfaces`: `set`
`PcapFilterID`: `enum`	Enum type identifying dynamic BPF filters.
`ProcStats`: `record`	Statistics about Zeek’s process.
`RADIUS::AttributeList`: `vector`
`RADIUS::Attributes`: `table`
`RADIUS::Message`: `record`
`RDP::ClientChannelDef`: `record`	Name and flags for a single channel requested by the client.
`RDP::ClientChannelList`: `vector`	The list of channels requested by the client.
`RDP::ClientClusterData`: `record`	The TS_UD_CS_CLUSTER data block is sent by the client to the server either to advertise that it can support the Server Redirection PDUs or to request a connection to a given session identifier.
`RDP::ClientCoreData`: `record`
`RDP::ClientSecurityData`: `record`	The TS_UD_CS_SEC data block contains security-related information used to advertise client cryptographic support.
`RDP::EarlyCapabilityFlags`: `record`
`ReassemblerStats`: `record`	Holds statistics for all types of reassembly.
`ReporterStats`: `record`	Statistics about reporter messages and weirds.
`SMB1::Find_First2_Request_Args`: `record`
`SMB1::Find_First2_Response_Args`: `record`
`SMB1::Header`: `record`	An SMB1 header.
`SMB1::NegotiateCapabilities`: `record`
`SMB1::NegotiateRawMode`: `record`
`SMB1::NegotiateResponse`: `record`
`SMB1::NegotiateResponseCore`: `record`
`SMB1::NegotiateResponseLANMAN`: `record`
`SMB1::NegotiateResponseNTLM`: `record`
`SMB1::NegotiateResponseSecurity`: `record`
`SMB1::SessionSetupAndXCapabilities`: `record`
`SMB1::SessionSetupAndXRequest`: `record`
`SMB1::SessionSetupAndXResponse`: `record`
`SMB1::Trans2_Args`: `record`
`SMB1::Trans2_Sec_Args`: `record`
`SMB1::Trans_Sec_Args`: `record`
`SMB2::CloseResponse`: `record`	The response to an SMB2 close request, which is used by the client to close an instance of a file that was opened previously.
`SMB2::CompressionCapabilities`: `record`	Compression information as defined in SMB v.
`SMB2::CreateRequest`: `record`	The request sent by the client to request either creation of or access to a file.
`SMB2::CreateResponse`: `record`	The response to an SMB2 create_request request, which is sent by the client to request either creation of or access to a file.
`SMB2::EncryptionCapabilities`: `record`	Encryption information as defined in SMB v.
`SMB2::FileAttrs`: `record`	A series of boolean flags describing basic and extended file attributes for SMB2.
`SMB2::FileEA`: `record`	This information class is used to query or set extended attribute (EA) information for a file.
`SMB2::FileEAs`: `vector`	A vector of extended attribute (EA) information for a file.
`SMB2::Fscontrol`: `record`	A series of integers flags used to set quota and content indexing control information for a file system volume in SMB2.
`SMB2::GUID`: `record`	An SMB2 globally unique identifier which identifies a file.
`SMB2::Header`: `record`	An SMB2 header.
`SMB2::NegotiateContextValue`: `record`	The context type information as defined in SMB v.
`SMB2::NegotiateContextValues`: `vector`
`SMB2::NegotiateResponse`: `record`	The response to an SMB2 negotiate request, which is used by tghe client to notify the server what dialects of the SMB2 protocol the client understands.
`SMB2::PreAuthIntegrityCapabilities`: `record`	Preauthentication information as defined in SMB v.
`SMB2::SessionSetupFlags`: `record`	A flags field that indicates additional information about the session that’s sent in the session_setup response.
`SMB2::SessionSetupRequest`: `record`	The request sent by the client to request a new authenticated session within a new or existing SMB 2 Protocol transport connection to the server.
`SMB2::SessionSetupResponse`: `record`	The response to an SMB2 session_setup request, which is sent by the client to request a new authenticated session within a new or existing SMB 2 Protocol transport connection to the server.
`SMB2::Transform_header`: `record`	An SMB2 transform header (for SMB 3.x dialects with encryption enabled).
`SMB2::TreeConnectResponse`: `record`	The response to an SMB2 tree_connect request, which is sent by the client to request access to a particular share on the server.
`SMB::MACTimes`: `record`	MAC times for a file.
`SNMP::Binding`: `record`	The `VarBind` data structure from either RFC 1157 or RFC 3416, which maps an Object Identifier to a value.
`SNMP::Bindings`: `vector`	A `VarBindList` data structure from either RFC 1157 or RFC 3416.
`SNMP::BulkPDU`: `record`	A `BulkPDU` data structure from RFC 3416.
`SNMP::Header`: `record`	A generic SNMP header data structure that may include data from any version of SNMP.
`SNMP::HeaderV1`: `record`	The top-level message data structure of an SNMPv1 datagram, not including the PDU data.
`SNMP::HeaderV2`: `record`	The top-level message data structure of an SNMPv2 datagram, not including the PDU data.
`SNMP::HeaderV3`: `record`	The top-level message data structure of an SNMPv3 datagram, not including the PDU data.
`SNMP::ObjectValue`: `record`	A generic SNMP object value, that may include any of the valid `ObjectSyntax` values from RFC 1155 or RFC 3416.
`SNMP::PDU`: `record`	A `PDU` data structure from either RFC 1157 or RFC 3416.
`SNMP::ScopedPDU_Context`: `record`	The `ScopedPduData` data structure of an SNMPv3 datagram, not including the PDU data (i.e.
`SNMP::TrapPDU`: `record`	A `Trap-PDU` data structure from RFC 1157.
`SOCKS::Address`: `record` `&log`	This record is for a SOCKS client or server to provide either a name or an address to represent a desired or established connection.
`SSH::Algorithm_Prefs`: `record`	The client and server each have some preferences for the algorithms used in each direction.
`SSH::Capabilities`: `record`	This record lists the preferences of an SSH endpoint for algorithm selection.
`SSL::PSKIdentity`: `record`
`SSL::SignatureAndHashAlgorithm`: `record`
`SYN_packet`: `record`	Fields of a SYN packet.
`TCP::Option`: `record`	A TCP Option field parsed from a TCP header.
`TCP::OptionList`: `vector`	The full list of TCP Option fields parsed from a TCP header.
`ThreadStats`: `record`	Statistics about threads.
`TimerStats`: `record`	Statistics of timers.
`Tunnel::EncapsulatingConn`: `record` `&log`	Records the identity of an encapsulating parent of a tunneled connection.
`Unified2::IDSEvent`: `record`
`Unified2::Packet`: `record`
`X509::BasicConstraints`: `record` `&log`
`X509::Certificate`: `record`
`X509::Extension`: `record`
`X509::Result`: `record`	Result of an X509 certificate chain verification
`X509::SubjectAlternativeName`: `record`
`addr_set`: `set`	A set of addresses.
`addr_vec`: `vector`	A vector of addresses.
`any_vec`: `vector`	A vector of any, used by some builtin functions to store a list of varying types.
`bittorrent_benc_dir`: `table`	A table of BitTorrent “benc” values.
`bittorrent_benc_value`: `record`	BitTorrent “benc” value.
`bittorrent_peer`: `record`	A BitTorrent peer.
`bittorrent_peer_set`: `set`	A set of BitTorrent peers.
`bt_tracker_headers`: `table`	Header table type used by BitTorrent analyzer.
`call_argument`: `record`	Meta-information about a parameter to a function/event.
`call_argument_vector`: `vector`	Vector type used to capture parameters of a function/event call.
`conn_id`: `record` `&log`	A connection’s identifying 4-tuple of endpoints and ports.
`connection`: `record`	A connection.
`count_set`: `set`	A set of counts.
`dns_answer`: `record`	The general part of a DNS reply.
`dns_binds_rr`: `record`	A Private RR type BINDS record.
`dns_dnskey_rr`: `record`	A DNSSEC DNSKEY record.
`dns_ds_rr`: `record`	A DNSSEC DS record.
`dns_edns_additional`: `record`	An additional DNS EDNS record.
`dns_edns_cookie`: `record`	An DNS EDNS COOKIE (COOKIE) record.
`dns_edns_ecs`: `record`	An DNS EDNS Client Subnet (ECS) record.
`dns_edns_tcp_keepalive`: `record`	An DNS EDNS TCP KEEPALIVE (TCP KEEPALIVE) record.
`dns_loc_rr`: `record`	A Private RR type LOC record.
`dns_mapping`: `record`
`dns_msg`: `record`	A DNS message.
`dns_nsec3_rr`: `record`	A DNSSEC NSEC3 record.
`dns_nsec3param_rr`: `record`	A DNSSEC NSEC3PARAM record.
`dns_rrsig_rr`: `record`	A DNSSEC RRSIG record.
`dns_soa`: `record`	A DNS SOA record.
`dns_tsig_additional`: `record`	An additional DNS TSIG record.
`double_vec`: `vector`	A vector of floating point numbers, used by telemetry builtin functions to store histogram bounds.
`endpoint`: `record`	Statistics about a `connection` endpoint.
`endpoint_stats`: `record`	Statistics about what a TCP endpoint sent.
`entropy_test_result`: `record`	Computed entropy values.
`fa_file`: `record` `&redef`	File Analysis handle for a file that Zeek is analyzing.
`fa_metadata`: `record`	File Analysis metadata that’s been inferred about a particular file.
`files_tag_set`: `set`	A set of file analyzer tags.
`flow_id`: `record` `&log`	The identifying 4-tuple of a uni-directional flow.
`ftp_port`: `record`	A parsed host/port combination describing server endpoint for an upcoming data transfer.
`geo_location`: `record` `&log`	GeoIP location information.
`gtp_access_point_name`: `string`
`gtp_cause`: `count`
`gtp_charging_characteristics`: `count`
`gtp_charging_gateway_addr`: `addr`
`gtp_charging_id`: `count`
`gtp_create_pdp_ctx_request_elements`: `record`
`gtp_create_pdp_ctx_response_elements`: `record`
`gtp_delete_pdp_ctx_request_elements`: `record`
`gtp_delete_pdp_ctx_response_elements`: `record`
`gtp_end_user_addr`: `record`
`gtp_gsn_addr`: `record`
`gtp_imsi`: `count`
`gtp_msisdn`: `string`
`gtp_nsapi`: `count`
`gtp_omc_id`: `string`
`gtp_private_extension`: `record`
`gtp_proto_config_options`: `string`
`gtp_qos_profile`: `record`
`gtp_rai`: `record`
`gtp_recovery`: `count`
`gtp_reordering_required`: `bool`
`gtp_selection_mode`: `count`
`gtp_teardown_ind`: `bool`
`gtp_teid1`: `count`
`gtp_teid_control_plane`: `count`
`gtp_tft`: `string`
`gtp_trace_reference`: `count`
`gtp_trace_type`: `count`
`gtp_trigger_id`: `string`
`gtp_update_pdp_ctx_request_elements`: `record`
`gtp_update_pdp_ctx_response_elements`: `record`
`gtpv1_hdr`: `record`	A GTPv1 (GPRS Tunneling Protocol) header.
`http_message_stat`: `record`	HTTP message statistics.
`http_stats_rec`: `record`	HTTP session statistics.
`icmp6_nd_option`: `record`	Options extracted from ICMPv6 neighbor discovery messages as specified by RFC 4861.
`icmp6_nd_options`: `vector`	A type alias for a vector of ICMPv6 neighbor discovery message options.
`icmp6_nd_prefix_info`: `record`	Values extracted from a Prefix Information option in an ICMPv6 neighbor discovery message as specified by RFC 4861.
`icmp_conn`: `record`	Specifics about an ICMP conversation.
`icmp_context`: `record`	Packet context part of an ICMP message.
`icmp_hdr`: `record`	Values extracted from an ICMP header.
`icmp_info`: `record`	Specifics about an ICMP conversation/packet.
`id_table`: `table`	Table type used to map script-level identifiers to meta-information describing them.
`index_vec`: `vector`	A vector of counts, used by some builtin functions to store a list of indices.
`int_vec`: `vector`	A vector of integers, used by telemetry builtin functions to store histogram bounds.
`interval_set`: `set`	A set of intervals.
`ip4_hdr`: `record`	Values extracted from an IPv4 header.
`ip6_ah`: `record`	Values extracted from an IPv6 Authentication extension header.
`ip6_dstopts`: `record`	Values extracted from an IPv6 Destination options extension header.
`ip6_esp`: `record`	Values extracted from an IPv6 ESP extension header.
`ip6_ext_hdr`: `record`	A general container for a more specific IPv6 extension header.
`ip6_ext_hdr_chain`: `vector`	A type alias for a vector of IPv6 extension headers.
`ip6_fragment`: `record`	Values extracted from an IPv6 Fragment extension header.
`ip6_hdr`: `record`	Values extracted from an IPv6 header.
`ip6_hopopts`: `record`	Values extracted from an IPv6 Hop-by-Hop options extension header.
`ip6_mobility_back`: `record`	Values extracted from an IPv6 Mobility Binding Acknowledgement message.
`ip6_mobility_be`: `record`	Values extracted from an IPv6 Mobility Binding Error message.
`ip6_mobility_brr`: `record`	Values extracted from an IPv6 Mobility Binding Refresh Request message.
`ip6_mobility_bu`: `record`	Values extracted from an IPv6 Mobility Binding Update message.
`ip6_mobility_cot`: `record`	Values extracted from an IPv6 Mobility Care-of Test message.
`ip6_mobility_coti`: `record`	Values extracted from an IPv6 Mobility Care-of Test Init message.
`ip6_mobility_hdr`: `record`	Values extracted from an IPv6 Mobility header.
`ip6_mobility_hot`: `record`	Values extracted from an IPv6 Mobility Home Test message.
`ip6_mobility_hoti`: `record`	Values extracted from an IPv6 Mobility Home Test Init message.
`ip6_mobility_msg`: `record`	Values extracted from an IPv6 Mobility header’s message data.
`ip6_option`: `record`	Values extracted from an IPv6 extension header’s (e.g.
`ip6_options`: `vector`	A type alias for a vector of IPv6 options.
`ip6_routing`: `record`	Values extracted from an IPv6 Routing extension header.
`irc_join_info`: `record`	IRC join information.
`irc_join_list`: `set`	Set of IRC join information.
`l2_hdr`: `record`	Values extracted from the layer 2 header.
`load_sample_info`: `set`
`mime_header_list`: `table`	A list of MIME headers.
`mime_header_rec`: `record`	A MIME header key/value pair.
`mime_match`: `record`	A structure indicating a MIME type and strength of a match against file magic signatures.
`mime_matches`: `vector`	A vector of file magic signature matches, ordered by strength of the signature, strongest first.
`pcap_packet`: `record`	Policy-level representation of a packet passed on by libpcap.
`pkt_hdr`: `record`	A packet header, consisting of an IP header and transport-layer header.
`pkt_profile_modes`: `enum`	Output modes for packet profiling information.
`pm_callit_request`: `record`	An RPC portmapper callit request.
`pm_mapping`: `record`	An RPC portmapper mapping.
`pm_mappings`: `table`	Table of RPC portmapper mappings.
`pm_port_request`: `record`	An RPC portmapper request.
`psk_identity_vec`: `vector`
`raw_pkt_hdr`: `record`	A raw packet header, consisting of L2 header and everything in `pkt_hdr`.
`record_field`: `record`	Meta-information about a record field.
`record_field_table`: `table`	Table type used to map record field declarations to meta-information describing them.
`rotate_info`: `record`
`script_id`: `record`	Meta-information about a script-level identifier.
`signature_and_hashalgorithm_vec`: `vector`	A vector of Signature and Hash Algorithms.
`signature_state`: `record`	Description of a signature match.
`string_any_file_hook`: `hook`	A hook taking a fa_file, an any, and a string.
`string_any_table`: `table`	A string-table of any.
`string_array`: `table`	An ordered array of strings.
`string_set`: `set`	A set of strings.
`string_vec`: `vector`	A vector of strings.
`subnet_vec`: `vector`	A vector of subnets.
`sw_align`: `record`	Helper type for return value of Smith-Waterman algorithm.
`sw_align_vec`: `vector`	Helper type for return value of Smith-Waterman algorithm.
`sw_params`: `record`	Parameters for the Smith-Waterman algorithm.
`sw_substring`: `record`	Helper type for return value of Smith-Waterman algorithm.
`sw_substring_vec`: `vector`	Return type for Smith-Waterman algorithm.
`table_string_of_count`: `table`	A table of counts indexed by strings.
`table_string_of_string`: `table`	A table of strings indexed by strings.
`tcp_hdr`: `record`	Values extracted from a TCP header.
`teredo_auth`: `record`	A Teredo origin indication header.
`teredo_hdr`: `record`	A Teredo packet header.
`teredo_origin`: `record`	A Teredo authentication header.
`transport_proto`: `enum`	A connection’s transport-layer protocol.
`udp_hdr`: `record`	Values extracted from a UDP header.
`var_sizes`: `table`	Table type used to map variable names to their memory allocation.
`x509_opaque_vector`: `vector`	A vector of x509 opaques.

Functions¶

`add_interface`: `function`	Internal function.
`add_signature_file`: `function`	Internal function.
`discarder_check_icmp`: `function`	Function for skipping packets based on their ICMP header.
`discarder_check_ip`: `function`	Function for skipping packets based on their IP header.
`discarder_check_tcp`: `function`	Function for skipping packets based on their TCP header.
`discarder_check_udp`: `function`	Function for skipping packets based on their UDP header.
`max_count`: `function`	Returns maximum of two `count` values.
`max_double`: `function`	Returns maximum of two `double` values.
`max_interval`: `function`	Returns maximum of two `interval` values.
`min_count`: `function`	Returns minimum of two `count` values.
`min_double`: `function`	Returns minimum of two `double` values.
`min_interval`: `function`	Returns minimum of two `interval` values.

Detailed Interface¶

Runtime Options¶

MQTT::max_payload_size ¶

Type: count
Attributes: &redef
Default: 100

The maximum payload size to allocate for the purpose of payload information in mqtt_publish events (and the default MQTT logs generated from that).

Weird::sampling_duration ¶

Type: interval
Attributes: &redef
Default: 10.0 mins

How long a weird of a given type is allowed to keep state/counters in memory. For “net” weirds an expiration timer starts per weird name when first initializing its counter. For “flow” weirds an expiration timer starts once per src/dst IP pair for the first weird of any name. For “conn” weirds, counters and expiration timers are kept for the duration of the connection for each named weird and reset when necessary. E.g. if a “conn” weird by the name of “foo” is seen more than Weird::sampling_threshold times, then an expiration timer begins for “foo” and upon triggering will reset the counter for “foo” and unthrottle its rate-limiting until it once again exceeds the threshold.

Weird::sampling_global_list ¶

Type: set [string]
Attributes: &redef
Default: {}

Rate-limits weird names in the table globally instead of per connection/flow.

Weird::sampling_rate ¶

Type: count
Attributes: &redef
Default: 1000

The rate-limiting sampling rate. One out of every of this number of rate-limited weirds of a given type will be allowed to raise events for further script-layer handling. Setting the sampling rate to 0 will disable all output of rate-limited weirds.

Weird::sampling_threshold ¶

Type: count
Attributes: &redef
Default: 25

How many weirds of a given type to tolerate before sampling begins. I.e. this many consecutive weirds of a given type will be allowed to raise events for script-layer handling before being rate-limited.

Weird::sampling_whitelist ¶

Type: set [string]
Attributes: &redef
Default: {}

Prevents rate-limiting sampling of any weirds named in the table.

default_file_bof_buffer_size ¶

Type: count
Attributes: &redef
Default: 4096

Default amount of bytes that file analysis will buffer in order to use for mime type matching. File analyzers attached at the time of mime type matching or later, will receive a copy of this buffer.

default_file_timeout_interval ¶

Type: interval
Attributes: &redef
Default: 2.0 mins

Default amount of time a file can be inactive before the file analysis gives up and discards any internal state related to the file.

ignore_checksums_nets ¶

Type: set [subnet]
Attributes: &redef
Default: {}

Checksums are ignored for all packets with a src address within this set of networks. Useful for cases where a host might be seeing packets collected from local hosts before checksums were applied by hardware. This frequently manifests when sniffing a local management interface on a host and Zeek sees packets before the hardware has had a chance to apply the checksums.

udp_content_delivery_ports_use_resp ¶

Type: bool
Attributes: &redef
Default: F

Whether ports given in udp_content_delivery_ports_orig and udp_content_delivery_ports_resp are in terms of UDP packet’s destination port or the UDP connection’s “responder” port.

udp_content_ports ¶

Type: set [port]
Attributes: &redef
Default: {}

Defines UDP ports (source or destination) for which the contents of either originator or responder streams should be delivered via udp_contents.

Redefinable Options¶

BinPAC::flowbuffer_capacity_max ¶

Type: count
Attributes: &redef
Default: 10485760

Maximum capacity, in bytes, that the BinPAC flowbuffer is allowed to grow to for use with incremental parsing of a given connection/analyzer.

BinPAC::flowbuffer_capacity_min ¶

Type: count
Attributes: &redef
Default: 512

The initial capacity, in bytes, that will be allocated to the BinPAC flowbuffer of a given connection/analyzer. If the buffer buffer is later contracted, its capacity is also reduced to this size.

BinPAC::flowbuffer_contract_threshold ¶

Type: count
Attributes: &redef
Default: 2097152

The threshold, in bytes, at which the BinPAC flowbuffer of a given connection/analyzer will have its capacity contracted to BinPAC::flowbuffer_capacity_min after parsing a full unit. I.e. this is the maximum capacity to reserve in between the parsing of units. If, after parsing a unit, the flowbuffer capacity is greater than this value, it will be contracted.

DCE_RPC::max_cmd_reassembly ¶

Type: count
Attributes: &redef
Default: 20

The maximum number of simultaneous fragmented commands that the DCE_RPC analyzer will tolerate before the it will generate a weird and skip further input.

DCE_RPC::max_frag_data ¶

Type: count
Attributes: &redef
Default: 30000

The maximum number of fragmented bytes that the DCE_RPC analyzer will tolerate on a command before the analyzer will generate a weird and skip further input.

KRB::keytab ¶

Type: string
Attributes: &redef
Default: ""

Kerberos keytab file name. Used to decrypt tickets encountered on the wire.

NCP::max_frame_size ¶

Type: count
Attributes: &redef
Default: 65536

The maximum number of bytes to allocate when parsing NCP frames.

NFS3::return_data ¶

Type: bool
Attributes: &redef
Default: F

If true, nfs_proc_read and nfs_proc_write events return the file data that has been read/written.

NFS3::return_data_first_only ¶

Type: bool
Attributes: &redef
Default: T

If NFS3::return_data is true, whether to only return data if the read or write offset is 0, i.e., only return data for the beginning of the file.

NFS3::return_data_max ¶

Type: count
Attributes: &redef
Default: 512

If NFS3::return_data is true, how much data should be returned at most.

Pcap::bufsize ¶

Type: count
Attributes: &redef
Default: 128

Number of Mbytes to provide as buffer space when capturing from live interfaces.

Pcap::snaplen ¶

Type: count
Attributes: &redef
Default: 9216

Number of bytes per packet to capture from live interfaces.

Reporter::errors_to_stderr ¶

Type: bool
Attributes: &redef
Default: T

Tunable for sending reporter error messages to STDERR. The option to turn it off is presented here in case Zeek is being run by some external harness and shouldn’t output anything to the console.

Reporter::info_to_stderr ¶

Type: bool
Attributes: &redef
Default: T

Tunable for sending reporter info messages to STDERR. The option to turn it off is presented here in case Zeek is being run by some external harness and shouldn’t output anything to the console.

Reporter::warnings_to_stderr ¶

Type: bool
Attributes: &redef
Default: T

Tunable for sending reporter warning messages to STDERR. The option to turn it off is presented here in case Zeek is being run by some external harness and shouldn’t output anything to the console.

SMB::pipe_filenames ¶

Type

set [string]

Attributes

&redef

Default

{}

Redefinition

from base/protocols/smb/consts.zeek

=:

spoolss, winreg, samr, srvsvc, netdfs, lsarpc, wkssvc, MsFteWds

A set of file names used as named pipes over SMB. This only comes into play as a heuristic to identify named pipes when the drive mapping wasn’t seen by Zeek.

Constants¶

CONTENTS_BOTH ¶

Type: count
Default: 3

Record both originator and responder contents.

CONTENTS_NONE ¶

Type: count
Default: 0

Turn off recording of contents.

CONTENTS_ORIG ¶

Type: count
Default: 1

Record originator contents.

CONTENTS_RESP ¶

Type: count
Default: 2

Record responder contents.

DNS_ADDL ¶

Type: count
Default: 3

An additional record.

DNS_ANS ¶

Type: count
Default: 1

An answer record.

DNS_AUTH ¶

Type: count
Default: 2

An authoritative record.

DNS_QUERY ¶

Type: count
Default: 0

A query. This shouldn’t occur, just for completeness.

ENDIAN_BIG ¶

Type: count
Default: 2

Big endian.

ENDIAN_CONFUSED ¶

Type: count
Default: 3

Tried to determine endian, but failed.

ENDIAN_LITTLE ¶

Type: count
Default: 1

Little endian.

ENDIAN_UNKNOWN ¶

Type: count
Default: 0

Endian not yet determined.

ICMP_UNREACH_ADMIN_PROHIB ¶

Type: count
Default: 13

Administratively prohibited.

ICMP_UNREACH_HOST ¶

Type: count
Default: 1

Host unreachable.

ICMP_UNREACH_NEEDFRAG ¶

Type: count
Default: 4

Fragment needed.

ICMP_UNREACH_NET ¶

Type: count
Default: 0

Network unreachable.

ICMP_UNREACH_PORT ¶

Type: count
Default: 3

Port unreachable.

ICMP_UNREACH_PROTOCOL ¶

Type: count
Default: 2

Protocol unreachable.

IPPROTO_AH ¶

Type: count
Default: 51

IPv6 authentication header.

IPPROTO_DSTOPTS ¶

Type: count
Default: 60

IPv6 destination options header.

IPPROTO_ESP ¶

Type: count
Default: 50

IPv6 encapsulating security payload header.

IPPROTO_FRAGMENT ¶

Type: count
Default: 44

IPv6 fragment header.

IPPROTO_HOPOPTS ¶

Type: count
Default: 0

IPv6 hop-by-hop-options header.

IPPROTO_ICMP ¶

Type: count
Default: 1

Control message protocol.

IPPROTO_ICMPV6 ¶

Type: count
Default: 58

ICMP for IPv6.

IPPROTO_IGMP ¶

Type: count
Default: 2

Group management protocol.

IPPROTO_IP ¶

Type: count
Default: 0

Dummy for IP.

IPPROTO_IPIP ¶

Type: count
Default: 4

IP encapsulation in IP.

IPPROTO_IPV6 ¶

Type: count
Default: 41

IPv6 header.

IPPROTO_MOBILITY ¶

Type: count
Default: 135

IPv6 mobility header.

IPPROTO_NONE ¶

Type: count
Default: 59

IPv6 no next header.

IPPROTO_RAW ¶

Type: count
Default: 255

Raw IP packet.

IPPROTO_ROUTING ¶

Type: count
Default: 43

IPv6 routing header.

IPPROTO_TCP ¶

Type: count
Default: 6

TCP.

IPPROTO_UDP ¶

Type: count
Default: 17

User datagram protocol.

LOGIN_STATE_AUTHENTICATE ¶

Type: count
Default: 0

LOGIN_STATE_CONFUSED ¶

Type: count
Default: 3

LOGIN_STATE_LOGGED_IN ¶

Type: count
Default: 1

LOGIN_STATE_SKIP ¶

Type: count
Default: 2

RPC_status ¶

Type

table [rpc_status] of string

Default

{
   [RPC_PROG_MISMATCH] = "mismatch",
   [RPC_AUTH_ERROR] = "auth error",
   [RPC_SYSTEM_ERR] = "system err",
   [RPC_PROC_UNAVAIL] = "proc unavail",
   [RPC_SUCCESS] = "ok",
   [RPC_UNKNOWN_ERROR] = "unknown",
   [RPC_TIMEOUT] = "timeout",
   [RPC_GARBAGE_ARGS] = "garbage args",
   [RPC_PROG_UNAVAIL] = "prog unavail"
}

Mapping of numerical RPC status codes to readable messages.

SNMP::OBJ_COUNTER32_TAG ¶

Type: count
Default: 65

Unsigned 32-bit integer.

SNMP::OBJ_COUNTER64_TAG ¶

Type: count
Default: 70

Unsigned 64-bit integer.

SNMP::OBJ_ENDOFMIBVIEW_TAG ¶

Type: count
Default: 130

A NULL value.

SNMP::OBJ_INTEGER_TAG ¶

Type: count
Default: 2

Signed 64-bit integer.

SNMP::OBJ_IPADDRESS_TAG ¶

Type: count
Default: 64

An IP address.

SNMP::OBJ_NOSUCHINSTANCE_TAG ¶

Type: count
Default: 129

A NULL value.

SNMP::OBJ_NOSUCHOBJECT_TAG ¶

Type: count
Default: 128

A NULL value.

SNMP::OBJ_OCTETSTRING_TAG ¶

Type: count
Default: 4

An octet string.

SNMP::OBJ_OID_TAG ¶

Type: count
Default: 6

An Object Identifier.

SNMP::OBJ_OPAQUE_TAG ¶

Type: count
Default: 68

An octet string.

SNMP::OBJ_TIMETICKS_TAG ¶

Type: count
Default: 67

Unsigned 32-bit integer.

SNMP::OBJ_UNSIGNED32_TAG ¶

Type: count
Default: 66

Unsigned 32-bit integer.

SNMP::OBJ_UNSPECIFIED_TAG ¶

Type: count
Default: 5

A NULL value.

TCP_CLOSED ¶

Type: count
Default: 5

Endpoint has closed connection.

TCP_ESTABLISHED ¶

Type: count
Default: 4

Endpoint has finished initial handshake regularly.

TCP_INACTIVE ¶

Type: count
Default: 0

Endpoint is still inactive.

TCP_PARTIAL ¶

Type: count
Default: 3

Endpoint has sent data but no initial SYN.

TCP_RESET ¶

Type: count
Default: 6

Endpoint has sent RST.

TCP_SYN_ACK_SENT ¶

Type: count
Default: 2

Endpoint has sent SYN/ACK.

TCP_SYN_SENT ¶

Type: count
Default: 1

Endpoint has sent SYN.

TH_ACK ¶

Type: count
Default: 16

ACK.

TH_FIN ¶

Type: count
Default: 1

FIN.

TH_FLAGS ¶

Type: count
Default: 63

Mask combining all flags.

TH_PUSH ¶

Type: count
Default: 8

PUSH.

TH_RST ¶

Type: count
Default: 4

RST.

TH_SYN ¶

Type: count
Default: 2

SYN.

TH_URG ¶

Type: count
Default: 32

URG.

UDP_ACTIVE ¶

Type: count
Default: 1

Endpoint has sent something.

UDP_INACTIVE ¶

Type: count
Default: 0

Endpoint is still inactive.

trace_output_file ¶

Type: string
Default: ""

Holds the filename of the trace file given with -w (empty if none).

State Variables¶

capture_filters ¶

Type: table [string] of string
Attributes: &redef
Default: {}

Set of BPF capture filters to use for capturing, indexed by a user-definable ID (which must be unique). If Zeek is not configured with PacketFilter::enable_auto_protocol_capture_filters, all packets matching at least one of the filters in this table (and all in restrict_filters) will be analyzed.

direct_login_prompts ¶

Type: set [string]
Attributes: &redef
Default: {}

TODO.

discarder_maxlen ¶

Type: count
Attributes: &redef
Default: 128

Maximum length of payload passed to discarder functions.

dns_max_queries ¶

Type: count
Attributes: &redef
Default: 25

If a DNS request includes more than this many queries, assume it’s non-DNS traffic and do not process it. Set to 0 to turn off this functionality.

dns_skip_addl ¶

Type: set [addr]
Attributes: &redef
Default: {}

For DNS servers in these sets, omit processing the ADDL records they include in their replies.

dns_skip_all_addl ¶

Type

bool

Attributes

&redef

Default

T

Redefinition

from policy/protocols/dns/auth-addl.zeek

=:

If true, all DNS ADDL records are skipped.

dns_skip_all_auth ¶

Type

bool

Attributes

&redef

Default

T

Redefinition

from policy/protocols/dns/auth-addl.zeek

=:

If true, all DNS AUTH records are skipped.

dns_skip_auth ¶

Type: set [addr]
Attributes: &redef
Default: {}

For DNS servers in these sets, omit processing the AUTH records they include in their replies.

done_with_network ¶

Type: bool
Default: F

http_entity_data_delivery_size ¶

Type: count
Attributes: &redef
Default: 1500

Maximum number of HTTP entity data delivered to events.

interfaces ¶

Type: string
Attributes: &add_func = add_interface &redef
Default: ""

Network interfaces to listen on. Use redef interfaces += "eth0" to extend.

load_sample_freq ¶

Type: count
Attributes: &redef
Default: 20

Rate at which to generate load_sample events. As all events, the event is only generated if you’ve also defined a load_sample handler. Units are inverse number of packets; e.g., a value of 20 means “roughly one in every 20 packets”.

Types¶

Backtrace ¶

Type: vector of BacktraceElement

A representation of a Zeek script’s call stack.

BacktraceElement ¶

Type

record

function_name: string: The name of the function being called at this point in the call stack.
function_args: call_argument_vector: The arguments passed to the function being called.
file_location: string &optional: The file in which the function call is being made.
line_location: count &optional: The line number at which the function call is being made.

A representation of an element in a Zeek script’s call stack.

BrokerStats ¶

Type

record

num_peers: count

num_stores: count: Number of active data stores.
num_pending_queries: count: Number of pending data store queries.
num_events_incoming: count: Number of total log messages received.
num_events_outgoing: count: Number of total log messages sent.
num_logs_incoming: count: Number of total log records received.
num_logs_outgoing: count: Number of total log records sent.
num_ids_incoming: count: Number of total identifiers received.
num_ids_outgoing: count: Number of total identifiers sent.

Statistics about Broker communication.