1rlm_acct_unique(5)             FreeRADIUS Module            rlm_acct_unique(5)
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NAME

6       rlm_acct_unique - FreeRADIUS Module
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DESCRIPTION

9       The rlm_acct_unique module creates a unique accounting session Id.
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11       Many  NAS  vendors  have  their  equipment  supply  an  Acct-Session-Id
12       attribute which is not unique over reboots.  This makes accounting dif‐
13       ficult,  as there will be many independent sessions with the same Acct-
14       Session-Id attribute.  This module uses the Acct-Session-Id  attribute,
15       along  with  other  attributes  in the request, to create a more unique
16       session ID, called Acct-Unique-Session-Id.
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18       The main configuration items to be aware of are:
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20       key    A list of the attributes used in calculating an MD5  hash  which
21              is used as the value for the unique session id.
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CONFIGURATION

24       modules {
25         ...
26         acct_unique {
27            key = "User-Name, Acct-Session-Id, NAS-IP-Address, NAS-Port"
28         }
29         ...
30       }
31        ...
32       preacct {
33         ...
34         acct_unique
35         ...
36       }
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38       After  generating  the  MD5  hash, the module adds it to the accounting
39       request packet received from the client.  It will look  something  like
40       this in your detail file:
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42            Acct-Unique-Session-Id = "c66ef57e480b9d26"
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44       NOTE:   Any attribute you specify that is not found in the 'dictionary'
45       file will cause the server to fail and exit with an error.
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47       NOTE:  If you want the Acct-Unique-Session-Id of the Start and the Stop
48       packet  of  a  particular session to match, you must use values for the
49       key that will stay the same for the Start and Stop.  The above  example
50       is  a good start.  Adding 'Acct-Session-Time', for example, would cause
51       a mismatch because that value is not the same on  the  Start  and  Stop
52       accounting packets.
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SECTIONS

55       authorization, pre-accounting, accounting
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FILES

58       /etc/raddb/radiusd.conf
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SEE ALSO

61       radiusd(8), radiusd.conf(5)
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AUTHORS

64       Chris Parker, cparker@segv.org
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68                                3 February 2004             rlm_acct_unique(5)