wireshark-filter(4) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | FILTER SYNTAX | FILTER FIELD REFERENCE | NOTES | SEE ALSO | AUTHORS

WIRESHARK-FILTER(4)                                   WIRESHARK-FILTER(4)

NAME         top

       wireshark-filter - Wireshark display filter syntax and reference

SYNOPSIS         top

       wireshark [other options] [ -Y "display filter expression" |
       --display-filter "display filter expression" ]

       tshark [other options] [ -Y "display filter expression" |
       --display-filter "display filter expression" ]

DESCRIPTION         top

       Wireshark and TShark share a powerful filter engine that helps
       remove the noise from a packet trace and lets you see only the
       packets that interest you. If a packet meets the requirements
       expressed in your filter, then it is displayed in the list of
       packets. Display filters let you compare the fields within a
       protocol against a specific value, compare fields against fields,
       and check the existence of specified fields or protocols.

       Filters are also used by other features such as statistics
       generation and packet list colorization (the latter is only
       available to Wireshark). This manual page describes their syntax.
       A comprehensive reference of filter fields can be found within
       Wireshark and in the display filter reference at
       https://www.wireshark.org/docs/dfref/.

FILTER SYNTAX         top

   Check whether a field or protocol exists
       The simplest filter allows you to check for the existence of a
       protocol or field. If you want to see all packets which contain
       the IP protocol, the filter would be "ip" (without the quotation
       marks). To see all packets that contain a Token-Ring RIF field,
       use "tr.rif".

       Whenever a protocol or field appears as the argument of a function
       in a filter, an exists operator for that protocol or field
       implicitly appears.

   Values and operators
       Each field has a value, and that value can be used in operations
       with comparable values (which may be literals, other fields, or
       function results). The value of a field is not necessarily what
       appears in the Wireshark display or TShark output. For example, a
       protocol is semantically equivalent to the sequence of bytes that
       it spans, not its displayed text in the protocol tree.

   Comparison operators
       The comparison operators can be expressed either through
       English-like abbreviations or through C-like symbols:

           eq, ==    Equal
           ne, !=    Not Equal
           gt, >     Greater Than
           lt, <     Less Than
           ge, >=    Greater than or Equal to
           le, <=    Less than or Equal to

       The ordering depends on the value type in the usual way (e.g.,
       lexicographic for strings and arithmetic for integers.) A field
       may appear more than once in a given frame. In that case equality
       can be strict (all fields must match the condition) or not (any
       field must match the condition). The inequality is the logical
       negation of equality. The following table contains all equality
       operators, their aliases and meaning:

           eq, any_eq, ==    Any field must be equal
           ne, all_ne, !=    All fields must be not equal
               all_eq, ===   All fields must be equal
               any_ne, !==   Any fields must be not equal

       The operators "any" or "all" can be used with any comparison
       operator to make the test match any or all fields:

           all tcp.port > 1024

           any ip.addr != 1.1.1.1

       The "any" and "all" modifiers take precedence over comparison
       operators such as "===" and "any_eq".

   Search and match operators
       Additional operators exist expressed only in English, not C-like
       syntax:

           contains     Does the protocol, field or slice contain a value
           matches, ~   Does the string match the given case-insensitive
                        Perl-compatible regular expression

       The "contains" operator allows a filter to search for a sequence
       of characters, expressed as a string, or bytes, expressed as a
       byte array. The type of the left hand side of the "contains"
       operator must be comparable to that of the right hand side after
       any implicit or explicit conversions.

       For example, to search for a given HTTP URL in a capture, the
       following filter can be used:

           http contains "https://www.wireshark.org"

       The "contains" operator cannot be used on atomic fields, such as
       numbers or IP addresses.

       The "matches" or "~" operator allows a filter to apply to a
       specified Perl-compatible regular expression (PCRE2). The regular
       expression must be a double quoted string. The left hand side of
       the "matches" operator must be a string, which can be a
       non-stringlike field implicitly or explicitly converted to a
       string. Matches are case-insensitive by default. For example, to
       search for a given WAP WSP User-Agent, you can write:

           wsp.header.user_agent matches "cldc"

       This would match "cldc", "CLDC", "cLdC" or any other combination
       of upper and lower case letters.

       You can force case sensitivity using

           wsp.header.user_agent matches "(?-i)cldc"

       This is an example of PCRE2’s (?option) construct. (?-i) performs
       a case-sensitive pattern match but other options can be specified
       as well. More information can be found in the
       pcre2pattern(3)|https://www.pcre.org/current/doc/html/pcre2pattern.html
       man page.

   Functions
       The filter language has the following functions:

           upper(string-field) - converts a string field to uppercase
           lower(string-field) - converts a string field to lowercase
           len(field)          - returns the byte length of a string or bytes field
           count(field)        - returns the number of field occurrences in a frame
           string(field)       - converts a non-string field to string
           vals(field)         - converts a field value to its value string
           dec(field)          - converts an unsigned integer to a decimal string
           hex(field)          - converts an unsigned integer to a hexadecimal string
           float(field)        - converts a field to single precision floating point
           double(field)       - converts a field to double precision floating point
           max(f1,...,fn)      - return the maximum value
           min(f1,...,fn)      - return the minimum value
           abs(field)          - return the absolute value of numeric fields

       upper() and lower() are useful for performing case-insensitive
       string comparisons. For example:

           upper(ncp.nds_stream_name) contains "MACRO"
           lower(mount.dump.hostname) == "angel"

       string() converts a field value to a string, suitable for use with
       operators like "matches" or "contains". Integer fields are
       converted to their decimal representation. It can be used with
       IP/Ethernet addresses (as well as others), but not with string or
       byte fields. For example:

           string(frame.number) matches "[13579]$"

       gives you all the odd packets. Note that the "matches" operator
       implicitly converts types of their value string representation; to
       match against the decimal representation of an integer field use
       string().

       vals() converts an integer or boolean field value to a string
       using the field’s associated value string, if it has one. This
       produces strings similar to those seen in custom columns. The
       resultant string can also be used with other operators. E.g.:

           vals(pfcp.msg_type) contains "Request"

       would match all packets which have a PFCP request, even if that
       request is not matched with a response.

       dec() and hex() convert unsigned integer fields to decimal or
       hexadecimal representation. Currently dec() and string() give same
       result for an unsigned integer, but it is possible that in the
       future string() will use the native base of the field.

       max() and min() take any number of arguments and returns one
       value, respectively the largest/smallest. The arguments must all
       have the same type.

       There is also a set of functions to test IP addresses:

           ip_special_name(ip)       - Returns the IP special-purpose block name as a string
           ip_special_mask(ip)       - Returns the IP special-purpose block flags as a mask. The bits are:
                                           4 3 2 1 0
                                           ---------
                                           S D F G R
                                       S = Source, D = Destination, F = Forwardable, G = Globally-reachable, R = Reserved-by-protocol

           ip_linklocal(ip)          - true if the IPv4 or IPv6 address is link-local
           ip_multicast(ip)          - true if the IPv4 or IPv6 address is multicast
           ip_rfc1918(ipv4)          - true if the IPv4 address is private-use (from the allocation in RFC 1918)
           ip_ula(ipv6)              - true if the IPv6 address is unique-local (ULA) as in RFC 4193

   Macros
       It is possible to define display filter macros. Macro are names
       that are replaced with the associated expression, possibly
       performing argument substitution. Macro expansions are purely
       textual replacements and performed recursively before compilation.
       They allow replacing long and often used expressions with easy to
       use names.

       Macros are defined using the GUI or directly in the "dmacros"
       configuration file. For example the definition

           "addplusone" {$1 + $2 + 1}

       creates a macro called addplusone that takes two arguments and
       expands to the given expression. Arguments in the replacement
       expression are given using the dollar sign.

       Macros are invoked like function but preceded with a dollar sign
       (sometimes also called a sigil):

           $addplusone(udp.src_port,udp.dst_port)

       results in the expression

           {udp.src_port + udp.dst_port + 1}

       after argument substitution. There is an older alternative
       notation to invoke macros:

           ${addplusone:udp.src_port;udp.dst_port}

       or

           ${addplusone;udp.src_port;udp.dst_port}

       Both forms are equivalent and can be used interchangibly as a
       matter of preference.

   Protocol field types
       Each protocol field is typed. The types are:

           ASN.1 object identifier, plain or relative
           AX.25 address
           Boolean
           Byte sequence
           Character string
           Character, 1 byte
           Date and time
           Ethernet or other MAC address
           EUI64 address
           Fibre Channel WWN
           Floating point, single or double precision
           Frame number
           Globally Unique Identifier
           IEEE-11073 floating point, 16 or 32 bits
           IPv4 address
           IPv6 address
           IPX network number
           Label
           OSI System-ID
           Protocol
           Signed integer, 1, 2, 3, 4, or 8 bytes
           Time offset
           Unsigned integer, 1, 2, 3, 4, or 8 bytes
           VINES address

       An integer may be expressed in decimal, octal, hexadecimal or
       binary notation, or as a C-style character constant. The following
       seven display filters are equivalent:

           frame.len > 10
           frame.len > 012
           frame.len > 0xa
           frame.len > 0b1010
           frame.len > '\n'
           frame.len > '\x0a'
           frame.len > '\012'

       Boolean values are either true or false. In a display filter
       expression testing the value of a Boolean field, true is expressed
       as the word true (case-insensitive) or any non-zero number. False
       is expressed as false (case-insensitive) or the number zero. For
       example, a token-ring packet’s source route field is Boolean. To
       find any source-routed packets, a display filter would be any of
       the following:

           tr.sr == 1
           tr.sr == true
           tr.sr == TRUE

       Non source-routed packets can be found with:

           tr.sr == 0
           tr.sr == false
           tr.sr == FALSE

       Ethernet addresses and byte arrays are represented by hex digits.
       The hex digits may be separated by colons, periods, or hyphens:

           eth.dst eq ff:ff:ff:ff:ff:ff
           aim.data == 0.1.0.d
           fddi.src == aa-aa-aa-aa-aa-aa
           echo.data == 7a

       IPv4 addresses can be represented in either dotted decimal
       notation or by using the hostname:

           ip.src == 192.168.1.1
           ip.dst eq www.mit.edu

       IPv4 addresses can be compared with the same logical relations as
       numbers: eq, ne, gt, ge, lt, and le. The IPv4 address is stored in
       host order, so you do not have to worry about the endianness of an
       IPv4 address when using it in a display filter.

       Classless Inter-Domain Routing (CIDR) notation can be used to test
       if an IPv4 address is in a certain subnet. For example, this
       display filter will find all packets in the 129.111 network:

           ip.addr == 129.111.0.0/16

       Remember, the number after the slash represents the number of bits
       used to represent the network. CIDR notation can also be used with
       hostnames, as in this example of finding IP addresses on the same
       network as 'sneezy' (requires that 'sneezy' resolve to an IP
       address for filter to be valid):

           ip.addr eq sneezy/24

       The CIDR notation can only be used on IP addresses or hostnames,
       not in variable names. So, a display filter like "ip.src/24 ==
       ip.dst/24" is not valid (yet).

       Transaction and other IDs are often represented by unsigned 16 or
       32 bit integers and formatted as a hexadecimal string with "0x"
       prefix:

           (dhcp.id == 0xfe089c15) || (ip.id == 0x0373)

       Strings are enclosed in double quotes:

           http.request.method == "POST"

       Inside double quotes, you may use a backslash to embed a double
       quote or an arbitrary byte represented in either octal or
       hexadecimal.

           browser.comment == "An embedded \" double-quote"

       Use of hexadecimal to look for "HEAD":

           http.request.method == "\x48EAD"

       Use of octal to look for "HEAD":

           http.request.method == "\110EAD"

       This means that you must escape backslashes with backslashes
       inside double quotes.

           smb.path contains "\\\\SERVER\\SHARE"

       looks for \\SERVER\SHARE in "smb.path". This may be more
       conveniently written as

           smb.path contains r"\\SERVER\SHARE"

       String literals prefixed with 'r' are called "raw strings". Such
       strings treat backslash as a literal character. Double quotes may
       still be escaped with backslash but note that backslashes are
       always preserved in the result.

       The following table lists all escape sequences supported with
       strings and character constants:

           \'          single quote
           \"          double quote
           \\          backslash
           \a          audible bell
           \b          backspace
           \f          form feed
           \n          line feed
           \r          carriage return
           \t          horizontal tab
           \v          vertical tab
           \NNN        arbitrary octal value
           \xNN        arbitrary hexadecimal value
           \uNNNN      Unicode codepoint U+NNNN
           \UNNNNNNNN  Unicode codepoint U+NNNNNNNN

       Date and time values can be given in ISO 8601 format or using a
       legacy month-year-time format:

           "2020-07-04T12:34:56"
           "Sep 26, 2004 23:18:04.954975"

       The 'T' separator in ISO 8601 can be omitted. The timezone can be
       given as "Z" or an offset from UTC.

       When not using ISO 8601 the timezone can be given as the strings
       "UTC", "GMT" or "UT" for UTC or also given as an offset from UTC,
       plus some North American and Nautical/Military designations (see
       the specification for %z in strptime(3)
       <https://man.netbsd.org/strptime.3>). Note that arbitrary timezone
       names are not supported however.

       If the timezone is omitted then date and time values are
       interpreted as local time.

   The slice operator
       You can take a slice of a field if the field base type is a text
       string or a byte array (the base type of most network address
       fields is bytes). For example, you can filter on the vendor
       portion of an ethernet address (the first three bytes) like this:

           eth.src[0:3] == 00:00:83

       Another example is:

           http.content_type[0:4] == "text"

       You can use the slice operator on a protocol name, too. The
       "frame" protocol can be useful, encompassing all the data captured
       by Wireshark or TShark.

           token[0:5] ne 0.0.0.1.1
           llc[0] eq aa
           frame[100-199] contains "wireshark"

       The following syntax governs slices:

           [i:j]    i = start_offset, j = length
           [i-j]    i = start_offset, j = end_offset, inclusive.
           [i]      i = start_offset, length = 1
           [:j]     start_offset = 0, length = j
           [i:]     start_offset = i, end_offset = end_of_field

       Slice indexes are zero-based. Offsets can be negative, in which
       case they indicate the offset from the end of the field. The last
       byte of the field is at offset -1, the last but one byte is at
       offset -2, and so on. Here’s how to check the last four bytes of a
       frame:

           frame[-4:4] == 0.1.2.3

       or

           frame[-4:] == 0.1.2.3

       As mentioned above the slice operator can be used on string and
       byte fields and will respectively produce string or byte slices.
       String slices are indexed on UTF-8 codepoint boundaries (i.e:
       internationalized characters), so the following comparison is
       true:

           "touché"[5] == "é"

       The example above generates an error because the compiler rejects
       constant expressions but is otherwise syntactically correct and
       exemplifies the behaviour of string slices.

       To obtain a byte slice of the same string the raw (@) operator can
       be used:

           @"touché"[5-6] == c3:a9

       A slice can always be compared against either a string or a byte
       sequence.

       Slices can be combined. You can concatenate them using the comma
       operator:

           ftp[1,3-5,9:] == 01:03:04:05:09:0a:0b

       This concatenates offset 1, offsets 3-5, and offset 9 to the end
       of the ftp data.

   The layer operator
       A field can be restricted to a certain layer in the protocol stack
       using the layer operator (#), followed by a decimal number:

           ip.addr#2 == 192.168.30.40

       matches only the inner (second) layer in the packet. Layers use
       simple stacking semantics and protocol layers are counted
       sequentially starting from 1. For example, in a packet that
       contains two IPv4 headers, the outer (first) source address can be
       matched with "ip.src#1" and the inner (second) source address can
       be matched with "ip.src#2".

       For more complicated ranges the same syntax used with slices is
       valid:

           tcp.port#[2-4]

       means layers number 2, 3 or 4 inclusive. The hash symbol is
       required to distinguish a layer range from a slice.

   The at operator
       By prefixing the field name with an at sign (@) the comparison is
       done against the raw packet data for the field.

       A character string must be decoded from a source encoding during
       dissection. If there are decoding errors the resulting string will
       usually contain replacement characters:

           browser.comment == "string is &#xFFFD;&#xFFFD;&#xFFFD;&#xFFFD;"

       The at operator allows testing the raw undecoded data:

           @browser.comment == 73:74:72:69:6e:67:20:69:73:20:aa:aa:aa:aa

       The syntactical rules for a bytes field type apply to the second
       example.

   The membership operator
       A field may be checked for matches against a set of values simply
       with the membership operator. For instance, you may find traffic
       on common HTTP/HTTPS ports with the following filter:

           tcp.port in {80,443,8080}

       as opposed to the more verbose:

           tcp.port == 80 or tcp.port == 443 or tcp.port == 8080

       To find HTTP requests using the HEAD or GET methods:

           http.request.method in {"HEAD", "GET"}

       The set of values can also contain ranges:

           tcp.port in {443, 4430..4434}
           ip.addr in {10.0.0.5 .. 10.0.0.9, 192.168.1.1..192.168.1.9}
           frame.time_delta in {10 .. 10.5}

   Implicit type conversions
       When fields which are sequences of bytes, including protocols, are
       compared with (double quoted) literal strings and raw strings, the
       literals are converted to their byte representation using the
       UTF-8 encoding. (To be precise, the original byte sequence is
       used, not the canonical normalized forms, so the precomposed é
       (U+00E9) and decomposed é (U+0065 U+0301) can match differently.)

       So, for instance, the following filters are equivalent:

           tcp.payload contains "GET"
           tcp.payload contains 47.45.54

       As noted above, a slice can also be compared in either way:

           frame[60:2] gt 50.51
           frame[60:2] gt "PQ"

       The inverse does not occur; stringlike fields are not implicitly
       converted to byte arrays. (Some operators allow stringlike fields
       to be compared with unquoted literals, which are then treated as
       strings; this is deprecated in general and specifically disallowed
       by the "matches" operator. Literal strings should be double quoted
       for clarity.)

       A hex integer that is 0xff or less (which means it fits inside one
       byte) can be implicitly converted to a byte string. This is not
       allowed for hex integers greater than one byte, because then one
       would need to specify the endianness of the multi-byte integer.
       Also, this is not allowed for decimal or octal numbers, since they
       would be confused with the hex numbers that make up byte string
       literals. Nevertheless, single-byte hex integers can be
       convenient:

           frame[4] == 0xff
           frame[1:4] contains 0x02

       An integer or boolean field that has a value string can be
       compared to to one of the strings that corresponds with a value.
       As with stringlike fields and comparisons, it is possible to
       perform the comparison with an unquoted literal, though this is
       deprecated and will not work if the literal contains a space (as
       with "Modify Bearer Response" above). Double quotes are
       recommended.

       If there is a unique reverse mapping from the string literal into
       a numeric value, the string is converted into that number and the
       comparison function is applied using arithmetic rules. If the
       mapping is not unique, then equality and inequality can be tested,
       but not the ordered comparisons.

       This is in contrast with the string() and vals() functions, which
       convert the field value to a string and applies string
       (lexicographic) comparisons, as well as work with all operators
       that take strings. Therefore the following two filters give the
       same result:

           gtpv2.message_type <= 35
           gtpv2.message_type <= "Modify Bearer Response"

       whereas

           vals(gtpv2.message_type) <= "Modify Bearer Response"

       matches all messages whose value string precedes "Modify Bearer
       Response" in lexicographical order, and

           string(gtpv2.message_type) <= "35"

       matches all messages such that the message type comes before "35"
       in lexicographical order, i.e. would also match "170" (the message
       type for "Release Access Bearers Request.")

       For the "contains" and "matches" operators, which operate on
       strings (or byte arrays in the case of "contains"), fields on the
       left hand side are implicitly converted to their value strings for
       comparison. (To compare a field with a byte array, use the raw/at
       (@) operator.)

   Bitwise operators
       It is also possible to define tests with bitwise operations.
       Currently the following bitwise operator is supported:

           bitand, bitwise_and, &        Bitwise AND

       The bitwise AND operation allows masking bits and testing to see
       if one or more bits are set. Bitwise AND operates on integer
       protocol fields and slices.

       When testing for TCP SYN packets, you can write:

           tcp.flags & 0x02

       That expression will match all packets that contain a "tcp.flags"
       field with the 0x02 bit, i.e. the SYN bit, set.

       To match locally administered unicast ethernet addresses you can
       use:

           eth.addr[0] & 0x0f == 2

       When using slices, the bit mask must be specified as a byte
       string, and it must have the same number of bytes as the slice
       itself, as in:

           ip[42:2] & 40:ff

   Arithmetic operators
       Arithmetic expressions are supported with the usual operators:

           +   Addition
           -   Subtraction
           *   Multiplication
           /   Division
           %   Modulo (integer remainder)

       Arithmetic operations can be performed on numeric types. Numeric
       types are integers, floating point numbers and date and time
       values.

       Date and time values can only be multiplied by integers or
       floating point numbers (i.e: scalars) and furthermore the scalar
       multiplier must appear on the right-hand side of the arithmetic
       operation.

       For example it is possible to filter for UDP destination ports
       greater or equal by one to the source port with the expression:

           udp.dstport >= udp.srcport + 1

       It is possible to group arithmetic expressions using curly
       brackets (parenthesis will not work for this):

           tcp.dstport >= 4 * {tcp.srcport + 3}

       Do not confuse this usage of curly brackets with set membership.

       An unfortunate quirk in the filter syntax is that the subtraction
       operator must be preceded by a space character, so "A-B" must be
       written as "A -B" or "A - B".

   Protocol field references
       A variable using a sigil with the form $some.proto.field or
       ${some.proto.field} is called a field reference. A field reference
       is a field value read from the currently selected frame in the
       GUI. This is useful to build dynamic filters such as, frames since
       the last five minutes to the selected frame:

           frame.time_relative >= ${frame.time_relative} - 300

       or more simply

           frame.time_relative >= $frame.time_relative - 300

       Field references share a similar notation to macros but are
       distinct syntactical elements in the filter language.

   Logical expressions
       Tests can be combined using logical expressions. These too are
       expressible in C-like syntax or with English-like abbreviations.
       The following table lists the logical operators from highest to
       lowest precedence:

           not, ! Logical NOT   (right-associative)
           and, &&   Logical AND   (left-associative)
           xor, ^^   Logical XOR   (left-associative)
           or,  ||   Logical OR    (left-associative)

       The evaluation is always performed left to right. Expressions can
       be grouped by parentheses as well. The expression "A and B or not
       C or D and not E or F" is read:

           (A and B) or (not C) or (D and (not E)) or F

       It’s usually better to be explicit about grouping using
       parenthesis. The following are all valid display filter
       expressions:

           tcp.port == 80 and ip.src == 192.168.2.1
           not llc
           http and frame[100-199] contains "wireshark"
           (ipx.src.net == 0xbad && ipx.src.node == 0.0.0.0.0.1) || ip

       Remember that whenever a protocol or field name occurs in an
       expression, the "exists" operator is implicitly called. The
       "exists" operator has the highest priority. This means that the
       first filter expression must be read as "show me the packets for
       which tcp.port exists and equals 80, and ip.src exists and equals
       192.168.2.1". The second filter expression means "show me the
       packets where not exists llc", or in other words "where llc does
       not exist" and hence will match all packets that do not contain
       the llc protocol. The third filter expression includes the
       constraint that offset 199 in the frame exists, in other words the
       length of the frame is at least 200.

       Because each comparison has an implicit exists test for field
       values care must be taken when using the display filter to remove
       noise from the packet trace. If, for example, you want to filter
       out all IP multicast packets to address 224.1.2.3, then using:

           ip.dst ne 224.1.2.3

       may be too restrictive. This is the same as writing:

           ip.dst and ip.dst ne 224.1.2.3

       The filter selects only frames that have the "ip.dst" field. Any
       other frames, including all non-IP packets, will not be displayed.
       To display the non-IP packets as well, you can use one of the
       following two expressions:

           not ip.dst or ip.dst ne 224.1.2.3
           not ip.dst eq 224.1.2.3

       The first filter uses "not ip.dst" to include all non-IP packets
       and then lets "ip.dst ne 224.1.2.3" filter out the unwanted IP
       packets. The second filter also negates the implicit existence
       test and so is a shorter way to write the first.

FILTER FIELD REFERENCE         top

       The entire list of display filters is too large to list here. You
       can can find references and examples at the following locations:

       •   The online Display Filter Reference:
           https://www.wireshark.org/docs/dfref/View:Internals:Supported Protocols in Wireshark

       •   tshark -G fields on the command line

       •   The Wireshark wiki: https://wiki.wireshark.org/DisplayFilters

NOTES         top

       The wireshark-filter(4) manpage is part of the Wireshark
       distribution. The latest version of Wireshark can be found at
       https://www.wireshark.org.

       Regular expressions in the "matches" operator are provided by the
       PCRE2 library. See https://www.pcre.org/ for more information.

       This manpage does not describe the capture filter syntax, which is
       different. See the manual page of pcap-filter(7) or, if that
       doesn’t exist, tcpdump(8), or, if that doesn’t exist,
       https://wiki.wireshark.org/CaptureFilters for a description of
       capture filters.

       Display Filters are also described in the Wireshark User’s Guide
       <https://www.wireshark.org/docs/wsug_html_chunked/ChWorkBuildDisplayFilterSection.html>.

SEE ALSO         top

       wireshark(1), tshark(1), editcap(1), pcap(3), pcap-filter(7) or
       tcpdump(8) if it doesn’t exist.

AUTHORS         top

       See the list of authors in the Wireshark man page for a list of
       authors of that code..SH COLOPHON This page is part of the
       wireshark (Interactively dump and analyze network traffic)
       project. Information about the project can be found at 
       ⟨https://www.wireshark.org/⟩. If you have a bug report for this
       manual page, see
       ⟨https://gitlab.com/wireshark/wireshark/-/issues⟩. This page was
       obtained from the project's upstream Git repository
       ⟨https://gitlab.com/wireshark/wireshark.git⟩ on 2025-08-11. (At
       that time, the date of the most recent commit that was found in
       the repository was 2025-08-11.) If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       [email protected]

                                2025-08-09            WIRESHARK-FILTER(4)

Pages that refer to this page: rawshark(1)stratoshark(1)tshark(1)wireshark(1)wireshark-filter(4)