Provided by: packit_1.8.1-1_amd64 bug

NAME

       Packit - network packet generator and capture tool

SYNOPSIS

       Packet capture:

         packit -m capture [-cGHnvsX] [-i interface] [-r|-w file] expression

       Packet injection:

         packit -m inject [-t protocol] [-aAbcCdDeFgGhHIjJkKlLmMnNoOpPqQrRsSTuUvwWxXyYzZ] [-i interface]

DESCRIPTION

       Packit  is  a  network auditing tool. It's value is derived from its ability to customize,
       inject, monitor, and manipulate IP traffic. By allowing you to  define  (spoof)  all  TCP,
       UDP,  ICMP,  IP,  ARP,  RARP  and  Ethernet  header  options, Packit can be useful to test
       firewalls, intrusion detection systems, port  scanning,  simulating  network  traffic  and
       general TCP/IP auditing. Packit is also an excellent tool for learning TCP/IP.

PACKIT BASE OPTIONS

       -m mode
              Select a runtime mode. Currently supported modes are capture, inject and trace. The
              default mode is inject.

PACKET CAPTURE OPTIONS

       Packet capture options are as follows:

       -c count
              Specify the number of packets to capture.

       -e     Display link-layer header data.

       -G     Display the timestamp in GMT rather than localtime.

       -i interface
              Listen on interface. If unspecified, packit will use the lowest numbered device  in
              the 'up' state (excluding loopback).

       -n     Do  not  resolve  host  addresses to names but resolve ports numbers.  Disables DNS
              lookups.

       -nn    Do not resolve ports numbers to their protocol names but resolve host addresses.

       -nnn   Do not resolve host addresses or port numbers.

       -r file
              Read packet data from tcpdump formatted binary log file. Example:  a  file  created
              with -w option.

       -s snaplen
              Read snaplen bytes of data from each packet rather than the default of 68.

       -v     Enables verbose packet capture.

       -w file
              Write the raw packets to file rather than displaying time to stderr.

       -X     Display hexadecimal & ascii dump of each packet up to snap length bytes.

       expression
              Selects  which  packets should be displayed. If no expression is given, all packets
              are displayed. This option is based in pcap library. See the pcap-filter(7) manpage
              for more detailed information.

PACKET INJECTION AND TRACE

       Packet  injection  is  used  to define and inject a network traffic onto your network. You
       have the ability to define essentially any ARP, IP, TCP, UDP,  ICMP  and  Ethernet  header
       value.  This  can  be valuable in a number of ways, including testing firewalls, intrusion
       detection systems, simulating traffic flow and general TCP/IP auditing.

CHOOSE A PROTOCOL

       -t protocol
              Specify the type of packet to inject. Supported values are: ARP, RARP, TCP, UDP and
              ICMP. This option defaults to TCP in inject mode and to ICMP in trace mode.

PACKET INJECTION AND TRACE GENERAL

       This section documents the operational command-line options.

       -c count
              The  value of count is the total number of packets we would like to inject (a count
              value of 0 means forever).

       -b burst rate
              Specifies the number of packets to inject every interval (defined by -w).  A  burst
              rate of 0 will send packets as quickly as possible.

       -h     Host  response mode. Enabling this option will print any packet you inject and then
              wait to see if the remote host responds. See -H option for timeout.

       -H timeout
              Specify the timeout value (in seconds) to use with '-h'. This value defaults to '1'
              second.

       -i interface
              Specify the interface to transmit from, if the machine has multiple interfaces.

       -I tci Specify   802.1Q   TCI   (VLAN   ID/CFI/priority   combination).  This  feature  is
              EXPERIMENTAL.

       -v     Verbose injection mode. Displays each packet you  inject.  It  also  has  the  same
              effect as in capture mode while used with the '-h' option.

       -p payload
              This  option  defines  the  payload  portion  of  the header. Hex payload should be
              prefixed with '0x' with each value separated by a whitespace. An ASCII example:  -p
              'hello, this is my packet'. A Hex example: -p '0x 70 61 63 6B 69 74'.

       -w interval
              Specify the number of seconds to wait between packet bursts. This value defaults to
              '1' second.

       -Z length
              Specify the size of the packet(s) to inject. The maximum value is 65535.

IP HEADER OPTIONS

       This section documents the IP header command-line options.

       -s src address
              The IP address the packet will appear to come from.  If  unspecified,  packit  will
              default  to  the  IP  address  of  the  lowest  numbered  device in the 'up' state,
              excluding loopback.

       -sR    Use a random source IP address.

       -d dst address
              The IP address of the machine you would like to contact.

       -dR    Use a random destination IP address.

       -o type of service
              TOS values are typically in hexadecimal format, however, packit  only  accepts  TOS
              values as integers. Below are the 4 valid TOS bit values:

              •  Minimize delay: 16 (0x10)

              •  Maximize throughput: 8 (0x08)

              •  Maximize reliability: 4 (0x04)

              •  Minimize monetary cost: 2 (0x02)

       -n ID number
              The  ID  number  is  used  to  identify  each datagram sent by a host. It generally
              increments by one with each datagram sent. This value is random by default.

       -T TTL The TTL value defines the upper limit on the number of devices  through  which  the
              datagram may pass to reach it's destination. The default value is 128.

       -V IP protocol number
              Specify  the  IP  protocol  associated  with this packet (RAWIP only).  The default
              value is 255.

TCP HEADER OPTIONS

       This section documents the TCP header command-line options.

       -S src port
              The port from which our source address is communicating from. This value is  random
              by default.

       -D dst port
              The  port  on  the destination we would like to communicate on. In inject mode this
              value is 0 by default while in trace mode this value is random by default. You  may
              also specify a range of addresses in the format: -D 1:1024.

       -f     Do not fragment this packet.

       -F tcp flags
              There  are 6 TCP header flag bits. They can be used in combination with one another
              and are specified using the following identifiers:

              •  S : SYN (Synchronization sequence number)

              •  F : FIN (Sender is finished)

              •  A : ACK (Acknowledgement number is valid)

              •  P : PSH (Receiver should push this data to the remote host)

              •  U : URG (The urgent pointer is valid)

              •  R : RST (Reset this connection)

              As an example, to set the SYN and FIN bits use the following: -F SF

       -q sequence number
              The sequence number is a 32-bit unsigned (positive) number  used  to  identify  the
              byte  in  a stream of data from the sending TCP to the receiving TCP that the first
              byte of data represents.

       -a ack number
              The acknowledgement (ack) number defines the next sequence number that  the  sender
              of the ack expects to see. It is typically the sequence number + 1 during valid TCP
              communication. It is a 32-bit unsigned (positive) number.

       -W window size
              The window size provides flow control. It is a 16-bit number that defines how  many
              bytes the receiver is willing to accept. The default value is 1500.

       -u urgent pointer
              In  valid  TCP  communication, the urgent pointer is only useful if the URG flag is
              set. Used with the sequence number, it points to the last byte of urgent data.

UDP HEADER OPTIONS

       This section documents the UDP header command-line options. UDP is the default IP protocol
       for TRACE mode.

       -S src port
              The  port from which our source address is communicating from. This value is random
              by default.

       -D dst port
              The port on the destination we would like to communicate on. In  inject  mode  this
              value  is 0 by default while in trace mode this value is random by default. You may
              also specify a range of addresses in the format: -D 1:1024.

ICMP HEADER OPTIONS

       This section documents the ICMP header command-line options.

       -K type
              Specify the ICMP type. See docs/ICMP.txt for details on types.  On  Debian  systems
              this file can be found at /usr/share/doc/packit/ICMP.txt.

       -C code
              Specify  the  ICMP  code. See docs/ICMP.txt for details on codes. On Debian systems
              this file can be found at /usr/share/doc/packit/ICMP.txt.

       ICMP ECHO REQUEST AND ECHO REPLY OPTIONS

              -N id number
                     Define the 16-bit ICMP  identification  number.  This  value  is  random  by
                     default.

              -Q sequence number
                     Define the 16-bit ICMP sequence number. This value is random by default.

       ICMP UNREACHABLE OR REDIRECT OR TIME EXCEEDED OPTIONS

              -g gateway
                     Define the gateway in which to redirect traffic to. This option is only used
                     for ICMP redirects (type 5).

              -j address
                     Define the source address of the original packet.

              -J src port
                     Define the source port of the original packet.

              -l address
                     Define the destination address of the original packet.

              -L dst port
                     Define the destination port of the original packet.

              -m time to live
                     Define the Time To Live of the original packet. This option defaults to 128.

              -M id  Define the IP ID of the original packet. This option defaults to random.

              -O type of service
                     Define the Type of Service of the original packet. See the -o option for the
                     possible values.

              -P protocol
                     Define the protocol of the original packet. This option defaults to UDP.

       MASK REQUEST AND MASK REPLY OPTIONS

              -N id number
                     Define  the  16-bit  ICMP  identification  number.  This  value is random by
                     default.

              -Q sequence number
                     Define the 16-bit ICMP sequence number. This value is random by default.

              -G address mask
                     Define the address network mask.  The  default  value  for  this  option  is
                     255.255.255.0.

       TIMESTAMP REQUEST AND TIMESTAMP REPLY OPTIONS

              -N id number
                     Define  the  16-bit  ICMP  identification  number.  This  value is random by
                     default.

              -Q sequence number
                     Define the 16-bit ICMP sequence number. This value is random by default.

              -U original timestamp
                     Define the 32-bit original timestamp. This value is 0 by default.

              -k received timestamp
                     Define the 32-bit received timestamp. This value is 0 by default.

              -z transmit timestamp
                     Define the 32-bit transmit timestamp. This value is 0 by default.

ARP AND RARP HEADER OPTIONS

       This section documents the ARP/RARP header command-line options. These  options  have  the
       ability  to  do  the  most damage with the least effort, especially on large cable and DSL
       networks. Use with caution.

       Packit only supports ARP/RARP protocol addresses in IPv4 format

       -A operation type
              Define the ARP / RARP / IRARP operation type. The valid options are as follows:

              •  1 : ARP Request (Default for ARP packages)

              •  2 : ARP Reply

              •  3 : Reverse ARP Request (Default for RARP packages)

              •  4 : Reverse ARP Reply

              •  5 : Inverse ARP Request

              •  6 : Inverse ARP Reply

       -y target IP address
              The IP address of the target host.

       -yR    Use a random target host IP address.

       -Y target ethernet address
              The Ethernet (hardware) address of the target host.

       -YR    Usage a random target host Ethernet address.

       -x sender IP address
              The IP address of the sender host.

       -xR    Use a random sender host IP address.

       -X sender ethernet address
              The Ethernet (hardware) address of the sender host.

       -XR    Usage a random sender host Ethernet address.

ETHERNET HEADER OPTIONS

       This section documents the Ethernet header command-line options.

       -e src ethernet address
              The Ethernet (hardware) address the packet  will  appear  to  come  from.   If  not
              defined, the original Ethernet address will be used.

       -eR    Use a random source Ethernet address. If you define this, you will most likely need
              to define the destination Ethernet header value as well. When using  either  -e  or
              -E,  you  enable  link  level  packet injection and the destination cannot be auto-
              defined while injecting in this manner.

       -E dst ethernet address
              The Ethernet (hardware) of the next routeable interface which the packet will cross
              while making it's way to the destination.

       -ER    Use  a  random  destination  Ethernet  address.  The  following two rules should be
              followed if you actually  want  the  destination  to  receive  the  packets  you're
              sending:

              1.  If  the destination exists beyond your default route (gateway), the destination
                  Ethernet address should be set to the default routes Ethernet address. This can
                  typically be found by using the arp(8) command.

              2.  If  the  destination  exists  on  your subnet, the destination Ethernet address
                  should be set to its Ethernet address. This can typically be found by using the
                  arp(8) command.

PACKET CAPTURE EXAMPLES

       Print all TCP communications that doesn't revolve around SSH (port 22):

           # packit -m cap 'tcp and not port 22'

       Print  the  start  and end packets (the SYN and FIN packets) of each TCP conversation that
       involves a non-local host, don't resolve addresses  and  display  hex/ascii  dump  of  the
       packet:

           # packit -m cap -nX 'tcp[tcpflags] & (tcp-syn|tcp-fin) != 0 and not src and dst net localnet'

       Write the first 10 ICMP packets captured to a file:

           # packit -m cap -c 10 -w /tmp/mylog 'icmp'

PACKET INJECTION EXAMPLES

       Inject  10  ICMP  type 8 (echo request) packets from host '3.1.33.7' to host '192.168.0.1'
       and watch for a response:

           # packit -t icmp -s 3.1.33.7 -d 192.168.0.1 -c 10 -h

       Inject an ICMP type 18 (mask reply) packet with an ICMP id of 211 and an address  mask  of
       255.255.255.0:

           # packit -t icmp -K 18 -d 127.0.0.1 -N 211 -G 255.255.255.0

       Inject  5  TCP  packets  from  random  hosts to 'www.example.com' with the SYN flag set, a
       window size of 666, a random source Ethernet address, a destination  Ethernet  address  of
       00:53:00:0f:00:0d, with a payload of "HI JOHN", displaying each packet injected.

           # packit -sR -d www.example.com -F S -c 5 -W 666 -eR -E 00:53:00:0f:00:0d -p 'HI JOHN' -v

       or simplifying the MAC address:

           # packit -sR -d www.example.com -F S -c 5 -W 666 -eR -E 0:53:0:f:00:d -p 'HI JOHN' -v

       Inject a total of 1000 TCP packets in 20 packet per second bursts from 192.168.0.1 on port
       403 to 192.168.0.20 on port 80 with the SYN and  RST  flags  set,  a  sequence  number  of
       12345678910 and a source Ethernet address of 0:0:0:0:0:0:

           # packit -s 192.168.0.1 -d 192.168.0.20 -S 403 -D 80 -F SR -q 12345678910 -c 1000 -b 20 -e 0:0:0:0:0:0

       Inject  a  TCP packets from 10.22.41.6 to 172.16.1.3 on ports ranging from 1-1024 with the
       SYN flag set and display each packet we send:

           # packit -s 10.22.41.6 -d 172.16.1.3 -D 1-1024 -F S -v

       Inject a broadcast ARP reply stating that 4.3.2.1 is at  00:53:00:01:02:03.   Also,  spoof
       the source Ethernet address for a little more authenticity and supply the payload in hex:

           # packit -t arp -A 2 -x 4.3.2.1 -X 5:4:3:2:1:0 -e 00:53:00:01:02:03 -p '0x 70 61 63 6B 69 74'

TRACE ROUTE EXAMPLES

       Appear as a DNS response by using a UDP source port of 53 (DNS):

           # packit -m trace -t UDP -d 192.168.2.35 -S 53

       Appear as HTTP traffic by using TCP port 80:

           # packit -m trace -t TCP -d www.google.com -S 80 -FS

BUGS

       •  Due  to  limitations in some versions of *BSD, specifying arbitrary Ethernet and/or ARP
          header data may not be supported.

       •  ARP capture data is incomplete.

       •  Please  send  bug  reports,  questions,  requests,   fixes   and   pull   requests   to
          https://github.com/resurrecting-open-source-projects/packit/issues

SEE ALSO

       arp(8), pcap(3), pcap-filter(7), tcpdump(1)

AUTHOR

       The  original  author of packit is Darren Bounds. Currently, this project is maintained by
       volunteers.

       The latest version of Packit can be found at  https://github.com/resurrecting-open-source-
       projects/packit