suricata.yaml

%YAML 1.1
---

# Suricata configuration file. In addition to the comments describing all
# options in this file, full documentation can be found at:
# https://suricata.readthedocs.io/en/latest/configuration/suricata-yaml.html

##
## Step 1: Inform Suricata about your network
##

vars:
  # more specific is better for alert accuracy and performance
  address-groups:
    HOME_NET: "[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]"
    EXTERNAL_NET: "!$HOME_NET"

    HTTP_SERVERS: "$HOME_NET"
    SMTP_SERVERS: "$HOME_NET"
    SQL_SERVERS: "$HOME_NET"
    DNS_SERVERS: "$HOME_NET"
    TELNET_SERVERS: "$HOME_NET"
    AIM_SERVERS: "$EXTERNAL_NET"
    DC_SERVERS: "$HOME_NET"
    DNP3_SERVER: "$HOME_NET"
    DNP3_CLIENT: "$HOME_NET"
    MODBUS_CLIENT: "$HOME_NET"
    MODBUS_SERVER: "$HOME_NET"
    ENIP_CLIENT: "$HOME_NET"
    ENIP_SERVER: "$HOME_NET"

  port-groups:
    HTTP_PORTS: "80"
    SHELLCODE_PORTS: "!80"
    ORACLE_PORTS: 1521
    SSH_PORTS: 22
    DNP3_PORTS: 20000
    MODBUS_PORTS: 502
    FILE_DATA_PORTS: "[$HTTP_PORTS,110,143]"
    FTP_PORTS: 21
    GENEVE_PORTS: 6081
    VXLAN_PORTS: 4789
    TEREDO_PORTS: 3544

##
## Step 2: Select outputs to enable
##

# The default logging directory.  Any log or output file will be
# placed here if it's not specified with a full path name. This can be
# overridden with the -l command line parameter.
default-log-dir: /log/slog/

# Global stats configuration
stats:
  enabled: no
  # The interval field (in seconds) controls the interval at
  # which stats are updated in the log.
  interval: 8
  # Add decode events to stats.
  #decoder-events: true
  # Decoder event prefix in stats. Has been 'decoder' before, but that leads
  # to missing events in the eve.stats records. See issue #2225.
  #decoder-events-prefix: "decoder.event"
  # Add stream events as stats.
  #stream-events: false

# Configure the type of alert (and other) logging you would like.
outputs:
  # a line based alerts log similar to Snort's fast.log
  - fast:
      enabled: yes
      filename: fast.log
      append: yes
      #filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'

  # Extensible Event Format (nicknamed EVE) event log in JSON format
  - eve-log:
      enabled: yes
      filetype: regular #regular|syslog|unix_dgram|unix_stream|redis
      filename: eve.json

      types:
        - alert:
            tagged-packets: yes
        - anomaly:
            # Anomaly log records describe unexpected conditions such
            # as truncated packets, packets with invalid IP/UDP/TCP
            # length values, and other events that render the packet
            # invalid for further processing or describe unexpected
            # behavior on an established stream. Networks which
            # experience high occurrences of anomalies may experience
            # packet processing degradation.
            #
            # Anomalies are reported for the following:
            # 1. Decode: Values and conditions that are detected while
            # decoding individual packets. This includes invalid or
            # unexpected values for low-level protocol lengths as well
            # as stream related events (TCP 3-way handshake issues,
            # unexpected sequence number, etc).
            # 2. Stream: This includes stream related events (TCP
            # 3-way handshake issues, unexpected sequence number,
            # etc).
            # 3. Application layer: These denote application layer
            # specific conditions that are unexpected, invalid or are
            # unexpected given the application monitoring state.
            #
            # By default, anomaly logging is enabled. When anomaly
            # logging is enabled, applayer anomaly reporting is
            # also enabled.
            enabled: yes
            #
            # Choose one or more types of anomaly logging and whether to enable
            # logging of the packet header for packet anomalies.
            types:
              # decode: no
              # stream: no
              # applayer: yes
            #packethdr: no
        - http:
            extended: yes     # enable this for extended logging information
        - dns:
            enabled: yes
            requests: yes
            responses: yes

            # Format of answer logging:
            # - detailed: array item per answer
            # - grouped: answers aggregated by type
            # Default: all
            #formats: [detailed, grouped]

            # DNS record types to log, based on the query type.
            # Default: all.
            #types: [a, aaaa, cname, mx, ns, ptr, txt]
        - tls:
            extended: yes     # enable this for extended logging information
        - files:
            force-magic: no   # force logging magic on all logged files
        - smtp:
            #extended: yes # enable this for extended logging information
            # this includes: bcc, message-id, subject, x_mailer, user-agent
            # custom fields logging from the list:
            #  reply-to, bcc, message-id, subject, x-mailer, user-agent, received,
            #  x-originating-ip, in-reply-to, references, importance, priority,
            #  sensitivity, organization, content-md5, date
            #custom: [received, x-mailer, x-originating-ip, relays, reply-to, bcc]
            # output md5 of fields: body, subject
            # for the body you need to set app-layer.protocols.smtp.mime.body-md5
            # to yes
            #md5: [body, subject]

        - ftp
        - rdp
        - nfs
        - smb
        - tftp
        - ikev2
        - dcerpc
        - krb5
        - snmp
        - rfb
        - sip
        - dhcp:
            enabled: yes
            # When extended mode is on, all DHCP messages are logged
            # with full detail. When extended mode is off (the
            # default), just enough information to map a MAC address
            # to an IP address is logged.
            extended: yes
        - ssh
        # bi-directional flows
        - flow
        # uni-directional flows
        #- netflow

  # Stats.log contains data from various counters of the Suricata engine.
  - stats:
      enabled: yes
      filename: stats.log
      append: yes       # append to file (yes) or overwrite it (no)
      totals: yes       # stats for all threads merged together
      threads: no       # per thread stats
      #null-values: yes  # print counters that have value 0. Default: no


# Logging configuration.  This is not about logging IDS alerts/events, but
# output about what Suricata is doing, like startup messages, errors, etc.
logging:
  # The default log level: can be overridden in an output section.
  # Note that debug level logging will only be emitted if Suricata was
  # compiled with the --enable-debug configure option.
  #
  # This value is overridden by the SC_LOG_LEVEL env var.
  default-log-level: notice

  # The default output format.  Optional parameter, should default to
  # something reasonable if not provided.  Can be overridden in an
  # output section.  You can leave this out to get the default.
  #
  # This value is overridden by the SC_LOG_FORMAT env var.
  #default-log-format: "[%i] %t - (%f:%l) <%d> (%n) -- "

  # A regex to filter output.  Can be overridden in an output section.
  # Defaults to empty (no filter).
  #
  # This value is overridden by the SC_LOG_OP_FILTER env var.
  default-output-filter:

  # Define your logging outputs.  If none are defined, or they are all
  # disabled you will get the default: console output.
  outputs:
  - console:
      enabled: no
      # type: json
  - file:
      enabled: yes
      level: info
      filename: suricata.log
      # type: json
  - syslog:
      enabled: no
      facility: local5
      format: "[%i] <%d> -- "
      # type: json


##
## Step 3: Configure common capture settings
##
## See "Advanced Capture Options" below for more options, including Netmap
## and PF_RING.
##

# Linux high speed capture support
af-packet:
  - interface: default
    # Number of receive threads. "auto" uses the number of cores
    #threads: auto
    # Default clusterid. AF_PACKET will load balance packets based on flow.
    cluster-id: 99
    # Default AF_PACKET cluster type. AF_PACKET can load balance per flow or per hash.
    # This is only supported for Linux kernel > 3.1
    # possible value are:
    #  * cluster_flow: all packets of a given flow are sent to the same socket
    #  * cluster_cpu: all packets treated in kernel by a CPU are sent to the same socket
    #  * cluster_qm: all packets linked by network card to a RSS queue are sent to the same
    #  socket. Requires at least Linux 3.14.
    #  * cluster_ebpf: eBPF file load balancing. See doc/userguide/capture-hardware/ebpf-xdp.rst for
    #  more info.
    # Recommended modes are cluster_flow on most boxes and cluster_cpu or cluster_qm on system
    # with capture card using RSS (requires cpu affinity tuning and system IRQ tuning)
    cluster-type: cluster_flow
    # In some fragmentation cases, the hash can not be computed. If "defrag" is set
    # to yes, the kernel will do the needed defragmentation before sending the packets.
    defrag: yes
    # To use the ring feature of AF_PACKET, set 'use-mmap' to yes
    use-mmap: yes
    # Lock memory map to avoid it being swapped. Be careful that over
    # subscribing could lock your system
    #mmap-locked: yes
    # Use tpacket_v3 capture mode, only active if use-mmap is true
    # Don't use it in IPS or TAP mode as it causes severe latency
    tpacket-v3: yes
    # Ring size will be computed with respect to "max-pending-packets" and number
    # of threads. You can set manually the ring size in number of packets by setting
    # the following value. If you are using flow "cluster-type" and have really network
    # intensive single-flow you may want to set the "ring-size" independently of the number
    # of threads:
    #ring-size: 2048
    # Block size is used by tpacket_v3 only. It should set to a value high enough to contain
    # a decent number of packets. Size is in bytes so please consider your MTU. It should be
    # a power of 2 and it must be multiple of page size (usually 4096).
    block-size: 65536
    # tpacket_v3 block timeout: an open block is passed to userspace if it is not
    # filled after block-timeout milliseconds.
    #block-timeout: 10
    # On busy systems, set it to yes to help recover from a packet drop
    # phase. This will result in some packets (at max a ring flush) not being inspected.
    #use-emergency-flush: yes
    # recv buffer size, increased value could improve performance
    buffer-size: 65536
    # Set to yes to disable promiscuous mode
    # disable-promisc: no
    # Choose checksum verification mode for the interface. At the moment
    # of the capture, some packets may have an invalid checksum due to
    # the checksum computation being offloaded to the network card.
    # Possible values are:
    #  - kernel: use indication sent by kernel for each packet (default)
    #  - yes: checksum validation is forced
    #  - no: checksum validation is disabled
    #  - auto: Suricata uses a statistical approach to detect when
    #  checksum off-loading is used.
    # Warning: 'capture.checksum-validation' must be set to yes to have any validation
    #checksum-checks: kernel
    # BPF filter to apply to this interface. The pcap filter syntax applies here.
    bpf-filter: "not port 5353"
    # You can use the following variables to activate AF_PACKET tap or IPS mode.
    # If copy-mode is set to ips or tap, the traffic coming to the current
    # interface will be copied to the copy-iface interface. If 'tap' is set, the
    # copy is complete. If 'ips' is set, the packet matching a 'drop' action
    # will not be copied.
    #copy-mode: ips
    #copy-iface: eth1
    #  For eBPF and XDP setup including bypass, filter and load balancing, please
    #  see doc/userguide/capture-hardware/ebpf-xdp.rst for more info.

# Cross platform libpcap capture support
pcap:
  - interface: default
    # On Linux, pcap will try to use mmap'ed capture and will use "buffer-size"
    # as total memory used by the ring. So set this to something bigger
    # than 1% of your bandwidth.
    #buffer-size: 16777216
    bpf-filter: "not port 5353"
    # set snaplen, if not set it defaults to MTU if MTU can be known
    # via ioctl call and to full capture if not.
    snaplen: 65536

# See "Advanced Capture Options" below for more options, including Netmap
# and PF_RING.

##
## Step 4: App Layer Protocol configuration
##

# Configure the app-layer parsers. The protocol's section details each
# protocol.
#
# The option "enabled" takes 3 values - "yes", "no", "detection-only".
# "yes" enables both detection and the parser, "no" disables both, and
# "detection-only" enables protocol detection only (parser disabled).
app-layer:
  protocols:
    rfb:
      enabled: yes
      detection-ports:
        dp: 5900, 5901, 5902, 5903, 5904, 5905, 5906, 5907, 5908, 5909
    # MQTT, disabled by default.
    mqtt:
      # enabled: no
      # max-msg-length: 1mb
      # subscribe-topic-match-limit: 100
      # unsubscribe-topic-match-limit: 100
    krb5:
      enabled: yes
    snmp:
      enabled: yes
    ikev2:
      enabled: yes
    tls:
      enabled: yes
      detection-ports:
        dp: 443

      # Generate JA3 fingerprint from client hello. If not specified it
      # will be disabled by default, but enabled if rules require it.
      #ja3-fingerprints: auto

      # What to do when the encrypted communications start:
      # - default: keep tracking TLS session, check for protocol anomalies,
      #            inspect tls_* keywords. Disables inspection of unmodified
      #            'content' signatures.
      # - bypass:  stop processing this flow as much as possible. No further
      #            TLS parsing and inspection. Offload flow bypass to kernel
      #            or hardware if possible.
      # - full:    keep tracking and inspection as normal. Unmodified content
      #            keyword signatures are inspected as well.
      #
      # For best performance, select 'bypass'.
      #
      #encryption-handling: default

    dcerpc:
      enabled: yes
    ftp:
      enabled: yes
      # memcap: 64mb
    rdp:
      #enabled: yes
    ssh:
      enabled: yes
      #hassh: yes
    # HTTP2: Experimental HTTP 2 support. Disabled by default.
    http2:
      enabled: no
      # use http keywords on HTTP2 traffic
      http1-rules: no
    smtp:
      enabled: yes
      raw-extraction: no
      # Configure SMTP-MIME Decoder
      mime:
        # Decode MIME messages from SMTP transactions
        # (may be resource intensive)
        # This field supersedes all others because it turns the entire
        # process on or off
        decode-mime: yes

        # Decode MIME entity bodies (ie. Base64, quoted-printable, etc.)
        decode-base64: yes
        decode-quoted-printable: yes

        # Maximum bytes per header data value stored in the data structure
        # (default is 2000)
        header-value-depth: 2000

        # Extract URLs and save in state data structure
        extract-urls: yes
        # Set to yes to compute the md5 of the mail body. You will then
        # be able to journalize it.
        body-md5: no
      # Configure inspected-tracker for file_data keyword
      inspected-tracker:
        content-limit: 100000
        content-inspect-min-size: 32768
        content-inspect-window: 4096
    imap:
      enabled: detection-only
    smb:
      enabled: yes
      detection-ports:
        dp: 139, 445

      # Stream reassembly size for SMB streams. By default track it completely.
      #stream-depth: 0

    nfs:
      enabled: yes
    tftp:
      enabled: yes
    dns:
      tcp:
        enabled: yes
        detection-ports:
          dp: 53
      udp:
        enabled: yes
        detection-ports:
          dp: 53
    http:
      enabled: yes
      # memcap:                   Maximum memory capacity for HTTP
      #                           Default is unlimited, values can be 64mb, e.g.

      # default-config:           Used when no server-config matches
      #   personality:            List of personalities used by default
      #   request-body-limit:     Limit reassembly of request body for inspection
      #                           by http_client_body & pcre /P option.
      #   response-body-limit:    Limit reassembly of response body for inspection
      #                           by file_data, http_server_body & pcre /Q option.
      #
      #   For advanced options, see the user guide


      # server-config:            List of server configurations to use if address matches
      #   address:                List of IP addresses or networks for this block
      #   personality:            List of personalities used by this block
      #
      #                           Then, all the fields from default-config can be overloaded
      #
      # Currently Available Personalities:
      #   Minimal, Generic, IDS (default), IIS_4_0, IIS_5_0, IIS_5_1, IIS_6_0,
      #   IIS_7_0, IIS_7_5, Apache_2
      libhtp:
         default-config:
           personality: IDS

           # Can be specified in kb, mb, gb.  Just a number indicates
           # it's in bytes.
           request-body-limit: 100kb
           response-body-limit: 100kb

           # inspection limits
           request-body-minimal-inspect-size: 32kb
           request-body-inspect-window: 4kb
           response-body-minimal-inspect-size: 40kb
           response-body-inspect-window: 16kb

           # response body decompression (0 disables)
           response-body-decompress-layer-limit: 2

           # auto will use http-body-inline mode in IPS mode, yes or no set it statically
           http-body-inline: auto

           # Decompress SWF files.
           # Two types: 'deflate', 'lzma', 'both' will decompress deflate and lzma
           # compress-depth:
           # Specifies the maximum amount of data to decompress,
           # set 0 for unlimited.
           # decompress-depth:
           # Specifies the maximum amount of decompressed data to obtain,
           # set 0 for unlimited.
           swf-decompression:
             enabled: yes
             type: both
             compress-depth: 100kb
             decompress-depth: 100kb

           # Use a random value for inspection sizes around the specified value.
           # This lowers the risk of some evasion techniques but could lead
           # to detection change between runs. It is set to 'yes' by default.
           #randomize-inspection-sizes: yes
           # If "randomize-inspection-sizes" is active, the value of various
           # inspection size will be chosen from the [1 - range%, 1 + range%]
           # range
           # Default value of "randomize-inspection-range" is 10.
           #randomize-inspection-range: 10

           # decoding
           double-decode-path: no
           double-decode-query: no

           # Can enable LZMA decompression
           #lzma-enabled: false
           # Memory limit usage for LZMA decompression dictionary
           # Data is decompressed until dictionary reaches this size
           #lzma-memlimit: 1mb
           # Maximum decompressed size with a compression ratio
           # above 2048 (only LZMA can reach this ratio, deflate cannot)
           #compression-bomb-limit: 1mb
           # Maximum time spent decompressing a single transaction in usec
           #decompression-time-limit: 100000

         server-config:

           #- apache:
           #    address: [192.168.1.0/24, 127.0.0.0/8, "::1"]
           #    personality: Apache_2
           #    # Can be specified in kb, mb, gb.  Just a number indicates
           #    # it's in bytes.
           #    request-body-limit: 4096
           #    response-body-limit: 4096
           #    double-decode-path: no
           #    double-decode-query: no

           #- iis7:
           #    address:
           #      - 192.168.0.0/24
           #      - 192.168.10.0/24
           #    personality: IIS_7_0
           #    # Can be specified in kb, mb, gb.  Just a number indicates
           #    # it's in bytes.
           #    request-body-limit: 4096
           #    response-body-limit: 4096
           #    double-decode-path: no
           #    double-decode-query: no

    # DNP3
    dnp3:
      enabled: no
      detection-ports:
        dp: 20000

    # SCADA EtherNet/IP and CIP protocol support
    enip:
      enabled: no
      detection-ports:
        dp: 44818
        sp: 44818

    ntp:
      enabled: yes

    dhcp:
      enabled: yes

    sip:
      enabled: yes

# Limit for the maximum number of asn1 frames to decode (default 256)
asn1-max-frames: 256

# Datasets default settings
# datasets:
#   # Default fallback memcap and hashsize values for datasets in case these
#   # were not explicitly defined.
#   defaults:
#     memcap: 100mb
#     hashsize: 2048

##############################################################################
##
## Advanced settings below
##
##############################################################################


# Default location of the pid file. The pid file is only used in
# daemon mode (start Suricata with -D). If not running in daemon mode
# the --pidfile command line option must be used to create a pid file.
pid-file: /var/run/suricata.pid

# Daemon working directory
# Suricata will change directory to this one if provided
# Default: "/"
#daemon-directory: "/"

coredump:
  max-dump: unlimited

# If the Suricata box is a router for the sniffed networks, set it to 'router'. If
# it is a pure sniffing setup, set it to 'sniffer-only'.
# If set to auto, the variable is internally switched to 'router' in IPS mode
# and 'sniffer-only' in IDS mode.
# This feature is currently only used by the reject* keywords.
host-mode: router

# Number of packets preallocated per thread. The default is 1024. A higher number 
# will make sure each CPU will be more easily kept busy, but may negatively 
# impact caching.
max-pending-packets: 4096

# Runmode the engine should use. Please check --list-runmodes to get the available
# runmodes for each packet acquisition method. Default depends on selected capture
# method. 'workers' generally gives best performance.
runmode: workers

# Unix command socket that can be used to pass commands to Suricata.
# An external tool can then connect to get information from Suricata
# or trigger some modifications of the engine. Set enabled to yes
# to activate the feature. In auto mode, the feature will only be
# activated in live capture mode. You can use the filename variable to set
# the file name of the socket.
unix-command:
  enabled: auto
  filename: /var/run/suricata.socket

legacy:
  uricontent: enabled

##
## Detection settings
##

# Set the order of alerts based on actions
# The default order is pass, drop, reject, alert
# action-order:
#   - pass
#   - drop
#   - reject
#   - alert

# When run with the option --engine-analysis, the engine will read each of
# the parameters below, and print reports for each of the enabled sections
# and exit.  The reports are printed to a file in the default log dir
# given by the parameter "default-log-dir", with engine reporting
# subsection below printing reports in its own report file.
engine-analysis:
  # enables printing reports for fast-pattern for every rule.
  rules-fast-pattern: yes
  # enables printing reports for each rule
  rules: yes

#recursion and match limits for PCRE where supported
pcre:
  match-limit: 3500
  match-limit-recursion: 1500

##
## Advanced Traffic Tracking and Reconstruction Settings
##

# Defrag settings:

defrag:
  memcap: 32mb
  hash-size: 65536
  trackers: 65535 # number of defragmented flows to follow
  max-frags: 65535 # number of fragments to keep (higher than trackers)
  prealloc: yes
  timeout: 60

# Flow settings:
# By default, the reserved memory (memcap) for flows is 32MB. This is the limit
# for flow allocation inside the engine. You can change this value to allow
# more memory usage for flows.
# The hash-size determines the size of the hash used to identify flows inside
# the engine, and by default the value is 65536.
# At startup, the engine can preallocate a number of flows, to get better
# performance. The number of flows preallocated is 10000 by default.
# emergency-recovery is the percentage of flows that the engine needs to
# prune before clearing the emergency state. The emergency state is activated
# when the memcap limit is reached, allowing new flows to be created, but
# pruning them with the emergency timeouts (they are defined below).
# If the memcap is reached, the engine will try to prune flows
# with the default timeouts. If it doesn't find a flow to prune, it will set
# the emergency bit and it will try again with more aggressive timeouts.
# If that doesn't work, then it will try to kill the oldest flows using
# last time seen flows.
# The memcap can be specified in kb, mb, gb.  Just a number indicates it's
# in bytes.

flow:
  memcap: 512mb
  hash-size: 65536
  prealloc: 10000
  emergency-recovery: 30
  #managers: 1 # default to one flow manager
  #recyclers: 1 # default to one flow recycler thread

# This option controls the use of VLAN ids in the flow (and defrag)
# hashing. Normally this should be enabled, but in some (broken)
# setups where both sides of a flow are not tagged with the same VLAN
# tag, we can ignore the VLAN id's in the flow hashing.
vlan:
  use-for-tracking: true

# Specific timeouts for flows. Here you can specify the timeouts that the
# active flows will wait to transit from the current state to another, on each
# protocol. The value of "new" determines the seconds to wait after a handshake or
# stream startup before the engine frees the data of that flow it doesn't
# change the state to established (usually if we don't receive more packets
# of that flow). The value of "established" is the amount of
# seconds that the engine will wait to free the flow if that time elapses
# without receiving new packets or closing the connection. "closed" is the
# amount of time to wait after a flow is closed (usually zero). "bypassed"
# timeout controls locally bypassed flows. For these flows we don't do any other
# tracking. If no packets have been seen after this timeout, the flow is discarded.
#
# There's an emergency mode that will become active under attack circumstances,
# making the engine to check flow status faster. This configuration variables
# use the prefix "emergency-" and work similar as the normal ones.
# Some timeouts doesn't apply to all the protocols, like "closed", for udp and
# icmp.

flow-timeouts:

  default:
    new: 30
    established: 300
    closed: 0
    bypassed: 100
    emergency-new: 10
    emergency-established: 100
    emergency-closed: 0
    emergency-bypassed: 50
  tcp:
    new: 60
    established: 600
    closed: 0
    bypassed: 100
    emergency-new: 5
    emergency-established: 100
    emergency-closed: 0
    emergency-bypassed: 50
  udp:
    new: 30
    established: 120
    bypassed: 100
    emergency-new: 10
    emergency-established: 100
    emergency-bypassed: 50
  icmp:
    new: 30
    established: 60
    bypassed: 100
    emergency-new: 10
    emergency-established: 100
    emergency-bypassed: 50

# Stream engine settings. Here the TCP stream tracking and reassembly
# engine is configured.
#
# stream:
#   memcap: 64mb                # Can be specified in kb, mb, gb.  Just a
#                               # number indicates it's in bytes.
#   checksum-validation: yes    # To validate the checksum of received
#                               # packet. If csum validation is specified as
#                               # "yes", then packets with invalid csum values will not
#                               # be processed by the engine stream/app layer.
#                               # Warning: locally generated traffic can be
#                               # generated without checksum due to hardware offload
#                               # of checksum. You can control the handling of checksum
#                               # on a per-interface basis via the 'checksum-checks'
#                               # option
#   prealloc-sessions: 2k       # 2k sessions prealloc'd per stream thread
#   midstream: false            # don't allow midstream session pickups
#   async-oneside: false        # don't enable async stream handling
#   inline: no                  # stream inline mode
#   drop-invalid: yes           # in inline mode, drop packets that are invalid with regards to streaming engine
#   max-synack-queued: 5        # Max different SYN/ACKs to queue
#   bypass: no                  # Bypass packets when stream.reassembly.depth is reached.
#                               # Warning: first side to reach this triggers
#                               # the bypass.
#
#   reassembly:
#     memcap: 256mb             # Can be specified in kb, mb, gb.  Just a number
#                               # indicates it's in bytes.
#     depth: 1mb                # Can be specified in kb, mb, gb.  Just a number
#                               # indicates it's in bytes.
#     toserver-chunk-size: 2560 # inspect raw stream in chunks of at least
#                               # this size.  Can be specified in kb, mb,
#                               # gb.  Just a number indicates it's in bytes.
#     toclient-chunk-size: 2560 # inspect raw stream in chunks of at least
#                               # this size.  Can be specified in kb, mb,
#                               # gb.  Just a number indicates it's in bytes.
#     randomize-chunk-size: yes # Take a random value for chunk size around the specified value.
#                               # This lowers the risk of some evasion techniques but could lead
#                               # to detection change between runs. It is set to 'yes' by default.
#     randomize-chunk-range: 10 # If randomize-chunk-size is active, the value of chunk-size is
#                               # a random value between (1 - randomize-chunk-range/100)*toserver-chunk-size
#                               # and (1 + randomize-chunk-range/100)*toserver-chunk-size and the same
#                               # calculation for toclient-chunk-size.
#                               # Default value of randomize-chunk-range is 10.
#
#     raw: yes                  # 'Raw' reassembly enabled or disabled.
#                               # raw is for content inspection by detection
#                               # engine.
#
#     segment-prealloc: 2048    # number of segments preallocated per thread
#
#     check-overlap-different-data: true|false
#                               # check if a segment contains different data
#                               # than what we've already seen for that
#                               # position in the stream.
#                               # This is enabled automatically if inline mode
#                               # is used or when stream-event:reassembly_overlap_different_data;
#                               # is used in a rule.
#
stream:
  memcap: 64mb
  checksum-validation: yes      # reject incorrect csums
  inline: auto                  # auto will use inline mode in IPS mode, yes or no set it statically
  reassembly:
    memcap: 256mb
    depth: 1mb                  # reassemble 1mb into a stream
    toserver-chunk-size: 2560
    toclient-chunk-size: 2560
    randomize-chunk-size: yes
    #randomize-chunk-range: 10
    #raw: yes
    #segment-prealloc: 2048
    #check-overlap-different-data: true

# Host table:
#
# Host table is used by the tagging and per host thresholding subsystems.
#
host:
  hash-size: 4096
  prealloc: 1000
  memcap: 32mb

# IP Pair table:
#
# Used by xbits 'ippair' tracking.
#
#ippair:
#  hash-size: 4096
#  prealloc: 1000
#  memcap: 32mb

# Decoder settings

decoder:
  # Teredo decoder is known to not be completely accurate
  # as it will sometimes detect non-teredo as teredo.
  teredo:
    enabled: true
    # ports to look for Teredo. Max 4 ports. If no ports are given, or
    # the value is set to 'any', Teredo detection runs on _all_ UDP packets.
    ports: $TEREDO_PORTS # syntax: '[3544, 1234]' or '3533' or 'any'.

  # VXLAN decoder is assigned to up to 4 UDP ports. By default only the
  # IANA assigned port 4789 is enabled.
  vxlan:
    enabled: true
    ports: $VXLAN_PORTS # syntax: '[8472, 4789]' or '4789'.

  # VNTag decode support
  vntag:
    enabled: false

  # Geneve decoder is assigned to up to 4 UDP ports. By default only the
  # IANA assigned port 6081 is enabled.
  geneve:
    enabled: true
    ports: $GENEVE_PORTS # syntax: '[6081, 1234]' or '6081'.

  # maximum number of decoder layers for a packet
  # max-layers: 16

##
## Performance tuning and profiling
##
detect:
  profile: medium
  custom-values:
    toclient-groups: 3
    toserver-groups: 25
  sgh-mpm-context: auto
  inspection-recursion-limit: 3000
  # If set to yes, the loading of signatures will be made after the capture
  # is started. This will limit the downtime in IPS mode.
  #delayed-detect: yes

  prefilter:
    # default prefiltering setting. "mpm" only creates MPM/fast_pattern
    # engines. "auto" also sets up prefilter engines for other keywords.
    # Use --list-keywords=all to see which keywords support prefiltering.
    default: mpm

  # the grouping values above control how many groups are created per
  # direction. Port whitelisting forces that port to get its own group.
  # Very common ports will benefit, as well as ports with many expensive
  # rules.
  grouping:
    #tcp-whitelist: 53, 80, 139, 443, 445, 1433, 3306, 3389, 6666, 6667, 8080
    #udp-whitelist: 53, 135, 5060


# Select the multi pattern algorithm you want to run for scan/search the
# in the engine.
#
# The supported algorithms are:
# "ac"      - Aho-Corasick, default implementation
# "ac-bs"   - Aho-Corasick, reduced memory implementation
# "ac-ks"   - Aho-Corasick, "Ken Steele" variant
# "hs"      - Hyperscan, available when built with Hyperscan support
#
# The default mpm-algo value of "auto" will use "hs" if Hyperscan is
# available, "ac" otherwise.
#
# The mpm you choose also decides the distribution of mpm contexts for
# signature groups, specified by the conf - "detect.sgh-mpm-context".
# Selecting "ac" as the mpm would require "detect.sgh-mpm-context"
# to be set to "single", because of ac's memory requirements, unless the
# ruleset is small enough to fit in memory, in which case one can
# use "full" with "ac".  The rest of the mpms can be run in "full" mode.

mpm-algo: auto

# Select the matching algorithm you want to use for single-pattern searches.
#
# Supported algorithms are "bm" (Boyer-Moore) and "hs" (Hyperscan, only
# available if Suricata has been built with Hyperscan support).
#
# The default of "auto" will use "hs" if available, otherwise "bm".

spm-algo: auto

# Suricata is multi-threaded. Here the threading can be influenced.
threading:
  set-cpu-affinity: no
  # Tune cpu affinity of threads. Each family of threads can be bound
  # to specific CPUs.
  #
  # These 2 apply to the all runmodes:
  # management-cpu-set is used for flow timeout handling, counters
  # worker-cpu-set is used for 'worker' threads
  #
  # Additionally, for autofp these apply:
  # receive-cpu-set is used for capture threads
  # verdict-cpu-set is used for IPS verdict threads
  #
  cpu-affinity:
    - management-cpu-set:
        cpu: [ 0 ]  # include only these CPUs in affinity settings
    - receive-cpu-set:
        cpu: [ 0 ]  # include only these CPUs in affinity settings
    - worker-cpu-set:
        cpu: [ "all" ]
        mode: "exclusive"
        # Use explicitly 3 threads and don't compute number by using
        # detect-thread-ratio variable:
        # threads: 3
        prio:
          low: [ 0 ]
          medium: [ "1-2" ]
          high: [ 3 ]
          default: "medium"
    #- verdict-cpu-set:
    #    cpu: [ 0 ]
    #    prio:
    #      default: "high"
  #
  # By default Suricata creates one "detect" thread per available CPU/CPU core.
  # This setting allows controlling this behaviour. A ratio setting of 2 will
  # create 2 detect threads for each CPU/CPU core. So for a dual core CPU this
  # will result in 4 detect threads. If values below 1 are used, less threads
  # are created. So on a dual core CPU a setting of 0.5 results in 1 detect
  # thread being created. Regardless of the setting at a minimum 1 detect
  # thread will always be created.
  #
  detect-thread-ratio: 1.0

# Luajit has a strange memory requirement, its 'states' need to be in the
# first 2G of the process' memory.
#
# 'luajit.states' is used to control how many states are preallocated.
# State use: per detect script: 1 per detect thread. Per output script: 1 per
# script.
luajit:
  states: 128

# General settings affecting packet capture
capture:
  # disable NIC offloading. It's restored when Suricata exits.
  # Enabled by default.
  disable-offloading: false
  #
  # disable checksum validation. Same as setting '-k none' on the
  # commandline.
  checksum-validation: none

# PF_RING configuration: for use with native PF_RING support
# for more info see http://www.ntop.org/products/pf_ring/
pfring:
  - interface: default
    # Number of receive threads. If set to 'auto' Suricata will first try
    # to use CPU (core) count and otherwise RSS queue count.
    threads: auto

    # Default clusterid.  PF_RING will load balance packets based on flow.
    # All threads/processes that will participate need to have the same
    # clusterid.
    cluster-id: 99

    # Default PF_RING cluster type. PF_RING can load balance per flow.
    # Possible values are cluster_flow or cluster_round_robin.
    cluster-type: cluster_flow

    # bpf filter for this interface
    bpf-filter: "not port 5353"

    # If bypass is set then the PF_RING hw bypass is activated, when supported
    # by the network interface. Suricata will instruct the interface to bypass
    # all future packets for a flow that need to be bypassed.
    #bypass: yes

    # Choose checksum verification mode for the interface. At the moment
    # of the capture, some packets may have an invalid checksum due to
    # the checksum computation being offloaded to the network card.
    # Possible values are:
    #  - rxonly: only compute checksum for packets received by network card.
    #  - yes: checksum validation is forced
    #  - no: checksum validation is disabled
    #  - auto: Suricata uses a statistical approach to detect when
    #  checksum off-loading is used. (default)
    # Warning: 'checksum-validation' must be set to yes to have any validation
    #checksum-checks: auto

##
## Configure Suricata to load Suricata-Update managed rules.
##

default-rule-path: /home/pi/.firewalla/run/suricata/rules

##
## Auxiliary configuration files.
##

classification-file: /home/pi/.firewalla/run/suricata/classification.config
reference-config-file: /home/pi/.firewalla/run/suricata/reference.config
threshold-file: /home/pi/.firewalla/run/suricata/threshold.config