get-iab(1)

NAME

   get-iab - Fetch the arp-scan IAB file from the IEEE website

SYNOPSIS

   get-iab [options]

DESCRIPTION

   get-iab  fetches the Ethernet IAB file from the IEEE website, and saves
   it in the format used by arp-scan.

   The IAB file contains all of the IABs (Individual Address Blocks)  that
   have  been  registered with IEEE.  Each IAB entry in the file specifies
   the first 36-bits of the 48-bit Ethernet hardware address, leaving  the
   remaining 12-bits for use by the registering organisation.  For example
   the IAB entry "0050C2003", registered  to  Microsoft,  applies  to  any
   Ethernet  hardware  address from 00:50:c2:00:30:00 to 00:50:c2:00:3f:ff
   inclusive.  Each IAB assignment represents  a  total  of  2^12  (4,096)
   Ethernet addresses.

   Major  Ethernet  hardware  vendors  typically  use  an OUI registration
   rather than an IAB registration.  See get-oui(1) for details.

   This script can be used to update the arp-scan IAB file from the latest
   data  on  the  IEEE  website.   It  is  relatively rare to see Ethernet
   addresses from IAB registrations, so the IAB file is not  as  important
   as the OUI file.

   The      IAB      data      is      fetched      from      the      URL
   http://standards.ieee.org/regauth/oui/iab.txt and the  output  file  is
   saved  to  the  file  ieee-iab.txt in the current directory. The URL to
   fetch the data from can be changed with the -u option, and  the  output
   file name can be changed with the -f option.

   The  ieee-iab.txt  file that is produced by this script is used by arp-
   scan to determine the Ethernet card vendor from its hardware address.

   The directory that arp-scan will look for the ieee-iab.txt file depends
   on  the  options  used  when  it  was built.  If it was built using the
   default options, then it will look in /usr/local/share/arp-scan.

OPTIONS

   -h     Display a brief usage message and exit.

   -f <fn>
          Write the output to the specified file instead  of  the  default
          ieee-iab.txt.

   -u <URL>
          Use  the specified URL to fetch the raw IAB data from instead of
          the default http://standards.ieee.org/regauth/oui/iab.txt

   -v     Display verbose progress messages.

FILES

   ieee-iab.txt
          The default output file.

EXAMPLES

   $ get-iab -v
   Renaming ieee-iab.txt to ieee-iab.txt.bak
   Fetching IAB data from http://standards.ieee.org/regauth/oui/iab.txt
   Fetched 230786 bytes
   Opening output file ieee-iab.txt
   1535 IAB entries written to file ieee-iab.txt

NOTES

   get-iab  is  implemented  in  Perl,  so  you  need  to  have  the  Perl
   interpreter installed on your system to use it.

   get-iab  uses  the  LWP::Simple  Perl module to fetch the data from the
   IEEE website. You must have this module installed on your system for it
   to  work.  This module is available on most distributions, often called
   libwww-perl.  It is also available in source form from CPAN.

   You can use a proxy  server  by  defining  the  http_proxy  environment
   variable.

AUTHOR

   Roy Hills <[email protected]>

SEE ALSO

   arp-scan(1)

   get-oui(1)

   arp-fingerprint(1)

   http://www.nta-monitor.com/wiki/ The arp-scan wiki page.

                            March 30, 2007                      GET-IAB(1)

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