Provided by: ipv6toolkit_2.0+ds.1-2build2_amd64 bug

NAME

       udp6 - A security assessment tool for UDP/IPv6 implementations

SYNOPSIS

       udp6  -i INTERFACE [-S LINK_SRC_ADDR] [-D LINK-DST-ADDR] [-s SRC_ADDR[/LEN]] [-d DST_ADDR]
       [-A  HOP_LIMIT]  [-y  FRAG_SIZE]  [-u  DST_OPT_HDR_SIZE]   [-U   DST_OPT_U_HDR_SIZE]   [-H
       HBH_OPT_HDR_SIZE]   [-P   PAYLOAD_SIZE]   [-o   SRC_PORT]  [-a  DST_PORT]  [-Z  DATA]  [-j
       PREFIX[/LEN]] [-k PREFIX[/LEN]]  [-J  LINK_ADDR]  [-K  LINK_ADDR]  [-b  PREFIX[/LEN]]  [-g
       PREFIX[/LEN]]  [-B  LINK_ADDR]  [-G  LINK_ADDR]  [-F N_SOURCES] [-T N_PORTS] [-L] [-l] [-p
       PROBE_MODE] [-z SECONDS] [-r RATE] [-v] [-h]

DESCRIPTION

       udp6 allows the assessment of IPv6 implementations with respect to  a  variety  of  attack
       vectors  based on UDP/IPv6 datagrams. This tool is part of the SI6 Networks' IPv6 Toolkit:
       a security assessment and troubleshooting toolkit for the IPv6 protocols.

       udp6 tool has two modes of operation: active and  listening.  In  active  mode,  the  tool
       attacks  a specific target, while in listening mode the tool listens to UDP traffic on the
       local network, and launches an attack in response to such traffic. Active mode is employed
       if an IPv6 Destination Address is specified. Listening mode is employed if the "-L" option
       (or its long counterpart "--listen") is set. If both an attack target and the "-L"  option
       are  specified,  the  attack  is  launched against the specified target, and then the tool
       enters listening mode to respond incoming packets with UDP datagrams.

       udp6 supports filtering of incoming packets based on  the  Ethernet  Source  Address,  the
       Ethernet  Destination  Address, the IPv6 Source Address, and the IPv6 Destination Address.
       There are two types of filters: "block  filters"  and  "accept  filters".  If  any  "block
       filter" is specified, and the incoming packet matches any of those filters, the message is
       discarded (and thus no UDP datagrams are sent in response).  If  any  "accept  filter"  is
       specified,  incoming  packets  must  match  the specified filters in order for the tool to
       respond with UDP datagrams.

OPTIONS

       udp6 takes itS parameters as command-line options. Each of the options  can  be  specified
       with a short name (one character preceded with the hyphen character, as e.g. "-i") or with
       a long name (a string preceded with two hyphen characters, as e.g. "--interface").

       If the tool is instructed to e.g. flood the  victim  with  UDP  datagrams  from  different
       sources ("--flood-sources" option), multiple packets may need to be generated.

       udp6 supports IPv6 Extension Headers, including the IPv6 Fragmentation Header, which might
       be of use to circumvent layer-2  filtering  and/or  Network  Intrusion  Detection  Systems
       (NIDS).  However,  IPv6  extension  headers  are  not  employed  by  default,  and must be
       explicitly enabled with the corresponding options.

       -i INTERFACE, --interface INTERFACE
              This option specifies the network interface that the tool  will  use.  The  network
              interface  must  be specified (i.e., the tool does not select any network interface
              "by default").

       -S SRC_LINK_ADDR, --src-link-address SRC_LINK_ADDR

              This option specifies the link-layer Source Address of the probe packets.  If  left
              unspecified,  the link-layer Source Address of the packets is set to the real link-
              layer address of the network interface. Note: this option is meaningful  only  when
              the underlying link-layer technology is Ethernet.

       -D DST_LINK_ADDR, --dst-link-address DST_LINK_ADDR

              This  option  specifies the link-layer Destination Address of the probe packets. By
              default, the link-layer Destination Address is automatically set to the  link-layer
              address  of  the  destination  host (for on-link destinations) or to the link-layer
              address of the first-hop router. Note: this option  is  meaningful  only  when  the
              underlying link-layer technology is Ethernet.

       -s SRC_ADDR, --src-address SRC_ADDR

              This  option  specifies the IPv6 source address (or IPv6 prefix) to be used for the
              Source Address of the attack packets. If the  "-F"  ("--flood-sources")  option  is
              specified,  this  option  includes  an IPv6 prefix, from which random addresses are
              selected. See the description of the "-F" option for further information on how the
              "-s" option is processed in that specific case.

              Note:  When  operating in "listening" mode, the Source Address is automatically set
              to the Destination Address of the incoming packet.

       -d DST_ADDR, --dst-address DST_ADDR

              This option specifies the IPv6 Destination Address of the victim. It  can  be  left
              unspecified only if the "-L" option is selected (i.e., if the tool is to operate in
              "listening" mode).

              Note: When operating in "listening" mode, the Destination Address is  automatically
              set to the Source Address of the incoming packet.

       -A HOP_LIMIT, --hop-limit HOP_LIMIT

              This option specifies the Hop Limit to be used for the IPv6 packets. It defaults to
              255.

       -u HDR_SIZE, --dst-opt-hdr HDR_SIZE

              This option specifies that a Destination Options header is to be  included  in  the
              outgoing  packet(s).  The extension header size must be specified as an argument to
              this option (the header is  filled  with  padding  options).  Multiple  Destination
              Options headers may be specified by means of multiple "-u" options.

       -U HDR_SIZE, --dst-opt-u-hdr HDR_SIZE

              This  option  specifies  a  Destination  Options  header  to  be  included  in  the
              "unfragmentable part" of the outgoing packet(s). The header size must be  specified
              as an argument to this option (the header is filled with padding options). Multiple
              Destination Options headers may be specified by means of multiple "-U" options.

       -H HDR_SIZE, --hbh-opt-hdr HDR_SIZE

              This option specifies that a Hop-by-Hop Options header is to  be  included  in  the
              outgoing packet(s). The header size must be specified as an argument to this option
              (the header is filled with padding options). Multiple  Hop-by-Hop  Options  headers
              may be specified by means of multiple "-H" options.

       -y FRAG_SIZE, --frag-hdr FRAG_SIZE

              This  option  specifies  that the resulting packet must be fragmented. The fragment
              size must be specified as an argument to this option.

       -P PAYLOAD_SIZE, --payload-size PAYLOAD_SIZE

              This options specifies the size of the UDP payload. It defaults to 0  (i.e.,  empty
              UDP datagrams).

       -o SRC_PORT, --src-port SRC_PORT

              This option specifies the UDP Source Port.

       -a DST_PORT, --dst-port DST_PORT

              This option specifies the UDP Destination Port.

       -Z DATA, --data DATA

              This  option  is  used  to  specify  the  UDP payload. It will typically include an
              application-layer request. Note: the string used for the DATA parameter can contain
              the  "\r" and "\n" C-style escape senquenced for representing "carriage return" and
              "line feed" (respectively).

              As an example, this option could be employed to send an  HTTP  request  if  set  as
              '--data "GET / HTTP/1.0\r\n\r\n"'.

       -j SRC_ADDR, --block-src SRC_ADDR

              This  option  sets  a  block  filter  for the incoming packets, based on their IPv6
              Source Address. It allows the specification of an  IPv6  prefix  in  the  form  "-j
              prefix/prefixlen". If the prefix length is not specified, a prefix length of "/128"
              is selected (i.e., the option assumes that a single IPv6 address,  rather  than  an
              IPv6 prefix, has been specified).

       -k DST_ADDR, --block-dst DST_ADDR

              This  option  sets  a  block  filter  for the incoming packets, based on their IPv6
              Destination Address. It allows the specification of an IPv6 prefix in the form  "-k
              prefix/prefixlen". If the prefix length is not specified, a prefix length of "/128"
              is selected (i.e., the option assumes that a single IPv6 address,  rather  than  an
              IPv6 prefix, has been specified).

       -J LINK_ADDR, --block-link-src LINK_ADDR

              This option sets a block filter for the incoming packets, based on their link-layer
              Source Address. The option must be followed by  a  link-layer  address  (currently,
              only Ethernet is supported).

       -K LINK_ADDR, --block-link-dst LINK_ADDR

              This option sets a block filter for the incoming packets, based on their link-layer
              Destination  Address.  The  option  must  be  followed  by  a  link-layer   address
              (currently, only Ethernet is supported).

       -b SRC_ADDR, --accept-src SRC_ADDR

              This  option  sets  an  accept filter for the incoming packets, based on their IPv6
              Source Address. It allows the specification of an  IPv6  prefix  in  the  form  "-b
              prefix/prefixlen". If the prefix length is not specified, a prefix length of "/128"
              is selected (i.e., the option assumes that a single IPv6 address,  rather  than  an
              IPv6 prefix, has been specified).

       -g DST_ADDR, --accept-dst DST_ADDR

              This  option  sets  a  accept  filter for the incoming packets, based on their IPv6
              Destination Address. It allows the specification of an IPv6 prefix in the form  "-g
              prefix/prefixlen". If the prefix length is not specified, a prefix length of "/128"
              is selected (i.e., the option assumes that a single IPv6 address,  rather  than  an
              IPv6 prefix, has been specified).

       -B LINK_ADDR, --accept-link-src LINK_ADDR

              This  option  sets  an accept filter for the incoming packets, based on their link-
              layer Source  Address.  The  option  must  be  followed  by  a  link-layer  address
              (currently, only Ethernet is supported).

       -G LINK_ADDR, --accept-link-dst LINK_ADDR

              This  option  sets  an accept filter for the incoming packets, based on their link-
              layer Destination Address. The option must be  followed  by  a  link-layer  address
              (currently, only Ethernet is supported).

       -F N_SOURCES, --flood-sources N_SOURCES

              This option instructs the tool to send multiple UDP datagrams with different Source
              Addresses. The number of different source addresses is specified  as  "-F  number".
              The  Source  Address  of  each  UDP  datagram  is randomly selected from the prefix
              specified by the "-s" option. If the "-F" option is specified but the  "-s"  option
              is  left  unspecified,  the Source Address of the packets is randomly selected from
              the prefix ::/0.

       -T N_PORTS, --flood-ports N_PORTS

              This option instructs the tool to send multiple UDP datagrams with different Source
              Ports.  The  Source  Port  of each UDP datagram is randomly selected from the whole
              port number space (0-65535).

       -l, --loop

              This option instructs the udp6 tool to send periodic UDP datagrams  to  the  victim
              node. The amount of time to pause between sending UDP datagrams can be specified by
              means of the "-z" option, and defaults to 1 second. Note that this option cannot be
              set in conjunction with the "-L" ("--listen") option.

       -z, --sleep

              This  option  specifies  the  amount of time to pause between sending UDP datagrams
              (when the "--loop" option is set). If left unspecified, it defaults to 1 second.

       -r RATE, --rate-limit RATE

              This option specifies the rate limit to use when performing a remote address  scan.
              "RATE"  should  be  specified  as  "xbps"  or  "xpps"  (with  "x" being an unsigned
              integer), for rate-limits in bits per second or packets per second, respectively.

       -L, --listen

              This instructs the udp6 tool to operate in listening mode (possibly after attacking
              a  given  node).  Note that this option cannot be used in conjunction with the "-l"
              ("--loop") option.

       -p PROBE_MODE, --probe-mode PROBE_MODE

              This option instructs th too to operate in probe mode. The specific probe  mode  is
              specified  as  an  argument  to  this  option  (currently,  only  "script"  mode is
              supported). In probe mode, the udp6 sends probe datagrams, and waits  for  response
              packets. The response packets are decoded based on the selected probe mode.

              In the "script" probe mode, the tool decodes UDP datagrams as follows:

                   RESPONSE:RESPONSE_TYPE:RESPONSE_DECODE...

              Where  the  string  RESPONSE  is  fixed,  and  RESPONSE_TYPE indicates the response
              received. As of this version of the tool, the following  RESPONSE_TYPE  values  are
              supported:

                 + UDP6: Indicates that the tool received a UDP/IPv6 packet
                 + TIMEOUT: Indicates that the tool received no response

              Possibe output lines of the tool are:

                  RESPONSE:TIMEOUT:
                  RESPONSE:UDP6:

              Note:  Future versions of the tool will also decode ICMPv6 error messages, and will
              include additional data regarding the incoming UDP datagrams (e.g., payload size).

       -v, --verbose

              This option instructs the udp6 tool to be verbose.  When the option is  set  twice,
              the  tool  is  "very  verbose",  and  the tool also informs which packets have been
              accepted or discarded as a result of applying the specified filters.

       -h, --help

              Print help information for the udp6 tool.

EXAMPLES

       The following sections illustrate typical use cases of the udp6 tool.

       Example #1

       # udp6 -s fc00:1::/64 -d fc00:1::1 -a 22 -F 100 -l -z 1 -v

       In this example the udp6 tool is essentially employed to flood port number 22 of the  host
       fc00:1::1.  The  tool sends UDP datagrams from the prefix fc00:1::/64 (as specified by the
       "-s" option) to port 22  (specified  by  the  "-a"  option)  at  the  destination  address
       fc00:1::1  (specified by the "-d" option). The tool sends UDP datagrams from 100 different
       addresses (as specified by the "-F" option) every one second (as specified by the "-l" and
       "-z" options). The tool will be verbose (as specified by the "-v" option).

       Example #3

       # udp6 -d fc00:1::1 -a 80 -l -r 1pps -v --data "GET / HTTP/1.0\r\n\r\n"

       Flood the target system (fc00:1::1) with UDP datagrams at a rate of one packet per second.
       Each UDP datagram will contain (in the payload) the  string  specified  via  the  "--data"
       option.

       Example #4

       #  udp6  -i  eth0  -d fc00:1::1 -a 80 -L -s fc00:1::/112 -l -r 1000pps --udp-flags auto -v
       --data "GET / HTTP/1.0\r\n\r\n" --flood-ports 10 --window-mode close

       Flood the target node (fc00:1::1) with UDP connections (on port 80).  On  each  connection
       that  is  established,  an HTTP request is sent, and the UDP window is immediately closed.
       For each forged IPv6 source address ten different UDP source  ports  are  randomized.  The
       bandwidth of the attack is limited to 1000 pps.

       Example #5

       #  udp6  -d  fc00:1::1  -a 80 --udp-flags A --dst-opt-hdr 8 --payload-size 50 --probe-mode
       script

       Send a probe UDP datagram to UDP port 80 at fc00:1::1. The probe  packet  consists  of  an
       IPv6  packet  with a Destination Options header of 8 bytes, and an IPv6 payload consisting
       of a UDP datagram with the ACK bit set, and 50 data bytes. The probe mode is "script".

AUTHOR

       The udp6  tool  and  the  corresponding  manual  pages  were  produced  by  Fernando  Gont
       <fgont@si6networks.com> for SI6 Networks <http://www.si6networks.com>.

COPYRIGHT

       Copyright (c) 2011-2013 Fernando Gont.

       Permission  is  granted to copy, distribute and/or modify this document under the terms of
       the GNU Free Documentation License, Version 1.3 or any later version published by the Free
       Software  Foundation;  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
       Texts.  A copy of the license is available at <http://www.gnu.org/licenses/fdl.html>.

                                                                                          UDP6(1)