# Warning: 'checksum-validation' must be set to yes to have checksum tested
checksum-checks: auto
+##
+## Step 5: App Layer Protocol Configuration
+##
+
+# Configure the app-layer parsers. The protocols 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:
+ tls:
+ enabled: yes
+ detection-ports:
+ dp: 443
+
+ #no-reassemble: yes
+ dcerpc:
+ enabled: yes
+ ftp:
+ enabled: yes
+ ssh:
+ enabled: yes
+ smtp:
+ enabled: yes
+ # Configure SMTP-MIME Decoder
+ mime:
+ # Decode MIME messages from SMTP transactions
+ # (may be resource intensive)
+ # This field supercedes 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
+ msn:
+ enabled: detection-only
+ smb:
+ enabled: yes
+ detection-ports:
+ dp: 139
+ # Note: Modbus probe parser is minimalist due to the poor significant field
+ # Only Modbus message length (greater than Modbus header length)
+ # And Protocol ID (equal to 0) are checked in probing parser
+ # It is important to enable detection port and define Modbus port
+ # to avoid false positive
+ modbus:
+ # How many unreplied Modbus requests are considered a flood.
+ # If the limit is reached, app-layer-event:modbus.flooded; will match.
+ #request-flood: 500
+
+ enabled: no
+ detection-ports:
+ dp: 502
+ # According to MODBUS Messaging on TCP/IP Implementation Guide V1.0b, it
+ # is recommended to keep the TCP connection opened with a remote device
+ # and not to open and close it for each MODBUS/TCP transaction. In that
+ # case, it is important to set the depth of the stream reassembling as
+ # unlimited (stream.reassembly.depth: 0)
+ # smb2 detection is disabled internally inside the engine.
+ #smb2:
+ # enabled: yes
+ dns:
+ # memcaps. Globally and per flow/state.
+ #global-memcap: 16mb
+ #state-memcap: 512kb
+
+ # How many unreplied DNS requests are considered a flood.
+ # If the limit is reached, app-layer-event:dns.flooded; will match.
+ #request-flood: 500
+
+ tcp:
+ enabled: yes
+ detection-ports:
+ dp: 53
+ udp:
+ enabled: yes
+ detection-ports:
+ dp: 53
+ http:
+ enabled: yes
+ # memcap: 64mb
+
+ # 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.
+ # double-decode-path: Double decode path section of the URI
+ # double-decode-query: Double decode query section of the URI
+ #
+ # server-config: List of server configurations to use if address matches
+ # address: List of ip addresses or networks for this block
+ # personalitiy: List of personalities used by this block
+ # 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.
+ # double-decode-path: Double decode path section of the URI
+ # double-decode-query: Double decode query section of the URI
+ #
+ # uri-include-all: Include all parts of the URI. By default the
+ # 'scheme', username/password, hostname and port
+ # are excluded. Setting this option to true adds
+ # all of them to the normalized uri as inspected
+ # by http_uri, urilen, pcre with /U and the other
+ # keywords that inspect the normalized uri.
+ # Note that this does not affect http_raw_uri.
+ # Also, note that including all was the default in
+ # 1.4 and 2.0beta1.
+ #
+ # meta-field-limit: Hard size limit for request and response size
+ # limits. Applies to request line and headers,
+ # response line and headers. Does not apply to
+ # request or response bodies. Default is 18k.
+ # If this limit is reached an event is raised.
+ #
+ # 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
+
+ # auto will use http-body-inline mode in IPS mode, yes or no set it statically
+ http-body-inline: auto
+
+ # Take a random value for inspection sizes around the specified value.
+ # This lower the risk of some evasion technics but could lead
+ # 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 choosen in 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
+
+ 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
+
+
+
# 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
match-limit: 3500
match-limit-recursion: 1500
-# Holds details on the app-layer. The protocols section details each protocol.
-# Under each protocol, the default value for detection-enabled and "
-# parsed-enabled is yes, unless specified otherwise.
-# Each protocol covers enabling/disabling parsers for all ipprotos
-# the app-layer protocol runs on. For example "dcerpc" refers to the tcp
-# version of the protocol as well as the udp version of the 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 detection only(parser disabled).
-app-layer:
- protocols:
- tls:
- enabled: yes
- detection-ports:
- dp: 443
-
- #no-reassemble: yes
- dcerpc:
- enabled: yes
- ftp:
- enabled: yes
- ssh:
- enabled: yes
- smtp:
- enabled: yes
- # Configure SMTP-MIME Decoder
- mime:
- # Decode MIME messages from SMTP transactions
- # (may be resource intensive)
- # This field supercedes 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
- msn:
- enabled: detection-only
- smb:
- enabled: yes
- detection-ports:
- dp: 139
- # Note: Modbus probe parser is minimalist due to the poor significant field
- # Only Modbus message length (greater than Modbus header length)
- # And Protocol ID (equal to 0) are checked in probing parser
- # It is important to enable detection port and define Modbus port
- # to avoid false positive
- modbus:
- # How many unreplied Modbus requests are considered a flood.
- # If the limit is reached, app-layer-event:modbus.flooded; will match.
- #request-flood: 500
-
- enabled: no
- detection-ports:
- dp: 502
- # According to MODBUS Messaging on TCP/IP Implementation Guide V1.0b, it
- # is recommended to keep the TCP connection opened with a remote device
- # and not to open and close it for each MODBUS/TCP transaction. In that
- # case, it is important to set the depth of the stream reassembling as
- # unlimited (stream.reassembly.depth: 0)
- # smb2 detection is disabled internally inside the engine.
- #smb2:
- # enabled: yes
- dns:
- # memcaps. Globally and per flow/state.
- #global-memcap: 16mb
- #state-memcap: 512kb
-
- # How many unreplied DNS requests are considered a flood.
- # If the limit is reached, app-layer-event:dns.flooded; will match.
- #request-flood: 500
-
- tcp:
- enabled: yes
- detection-ports:
- dp: 53
- udp:
- enabled: yes
- detection-ports:
- dp: 53
- http:
- enabled: yes
- # memcap: 64mb
-
- ###########################################################################
- # Configure libhtp.
- #
- #
- # 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.
- # double-decode-path: Double decode path section of the URI
- # double-decode-query: Double decode query section of the URI
- #
- # server-config: List of server configurations to use if address matches
- # address: List of ip addresses or networks for this block
- # personalitiy: List of personalities used by this block
- # 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.
- # double-decode-path: Double decode path section of the URI
- # double-decode-query: Double decode query section of the URI
- #
- # uri-include-all: Include all parts of the URI. By default the
- # 'scheme', username/password, hostname and port
- # are excluded. Setting this option to true adds
- # all of them to the normalized uri as inspected
- # by http_uri, urilen, pcre with /U and the other
- # keywords that inspect the normalized uri.
- # Note that this does not affect http_raw_uri.
- # Also, note that including all was the default in
- # 1.4 and 2.0beta1.
- #
- # meta-field-limit: Hard size limit for request and response size
- # limits. Applies to request line and headers,
- # response line and headers. Does not apply to
- # request or response bodies. Default is 18k.
- # If this limit is reached an event is raised.
- #
- # 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
-
- # auto will use http-body-inline mode in IPS mode, yes or no set it statically
- http-body-inline: auto
-
- # Take a random value for inspection sizes around the specified value.
- # This lower the risk of some evasion technics but could lead
- # 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 choosen in 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
-
- 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
-
# Profiling settings. Only effective if Suricata has been built with the
# the --enable-profiling configure flag.
#