get-iab(1)

1GET-IAB(1)                  General Commands Manual                 GET-IAB(1)
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NAME

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

9       get-iab [options]
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DESCRIPTION

12       get-iab  fetches the Ethernet IAB file from the IEEE website, and saves
13       it in the format used by arp-scan.
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15       The IAB file contains all of the IABs (Individual Address Blocks)  that
16       have  been  registered with IEEE.  Each IAB entry in the file specifies
17       the first 36-bits of the 48-bit Ethernet hardware address, leaving  the
18       remaining 12-bits for use by the registering organisation.  For example
19       the IAB entry "0050C2003", registered to Microsoft, applies to any Eth‐
20       ernet  hardware  address  from  00:50:c2:00:30:00  to 00:50:c2:00:3f:ff
21       inclusive.  Each IAB assignment represents a total of 2^12 (4,096) Eth‐
22       ernet addresses.
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24       Major  Ethernet  hardware  vendors  typically  use  an OUI registration
25       rather than an IAB registration.  See get-oui(1) for details.
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27       This script can be used to update the arp-scan IAB file from the latest
28       data  on  the  IEEE  website.   It  is  relatively rare to see Ethernet
29       addresses from IAB registrations, so the IAB file is not  as  important
30       as the OUI file.
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32       The    IAB    data    is    fetched    from    the   URL   http://stan‐
33       dards.ieee.org/regauth/oui/iab.txt and the output file is saved to  the
34       file  ieee-iab.txt  in the current directory. The URL to fetch the data
35       from can be changed with the -u option, and the output file name can be
36       changed with the -f option.
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38       The  ieee-iab.txt  file that is produced by this script is used by arp-
39       scan to determine the Ethernet card vendor from its hardware address.
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41       The directory that arp-scan will look for the ieee-iab.txt file depends
42       on  the  options  used  when  it  was built.  If it was built using the
43       default options, then it will look in /usr/local/share/arp-scan.
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OPTIONS

46       -h     Display a brief usage message and exit.
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48       -f <fn>
49              Write the output to the specified file instead  of  the  default
50              ieee-iab.txt.
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52       -u <URL>
53              Use  the specified URL to fetch the raw IAB data from instead of
54              the default http://standards.ieee.org/regauth/oui/iab.txt
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56       -v     Display verbose progress messages.
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FILES

59       ieee-iab.txt
60              The default output file.
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EXAMPLES

63       $ get-iab -v
64       Renaming ieee-iab.txt to ieee-iab.txt.bak
65       Fetching IAB data from http://standards.ieee.org/regauth/oui/iab.txt
66       Fetched 230786 bytes
67       Opening output file ieee-iab.txt
68       1535 IAB entries written to file ieee-iab.txt
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NOTES

71       get-iab is implemented in Perl, so you need to  have  the  Perl  inter‐
72       preter installed on your system to use it.
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74       get-iab  uses  the  LWP::Simple  Perl module to fetch the data from the
75       IEEE website. You must have this module installed on your system for it
76       to  work.  This module is available on most distributions, often called
77       libwww-perl.  It is also available in source form from CPAN.
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79       You can use a proxy server by defining the http_proxy environment vari‐
80       able.
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AUTHOR

83       Roy Hills <Roy.Hills@nta-monitor.com>
84