/usr/share/doc/freeradius/configuration/autz_type.rst is in freeradius 3.0.16+dfsg-1ubuntu3.
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=========
Like Auth-Type for authentication method selection freeradius also
supports the Autz-Type to select between authorization methods. The only
problem is that authorization is the first thing to be called when an
authentication request is handled. As a result we first have to call the
authorize section without checking for Autz-Type. After that we check for
Autz-Type and if it exists we call the corresponding subsection in the
authorize section. In other words the authorize section in radiusd.conf
should look like this::
authorize{
suffix
preprocess
# whatever other authorize modules here
Autz-Type Ldap{
ldap
}
Autz-Type SQL{
sql
}
files
}
What happens is that the first time the authorize section is examined the
suffix, preprocess and files modules are executed. If Autz-Type is set
after that the server core checks for any matching Autz-Type subsection.
If one is found it is called. The users file should look something
like this::
DEFAULT Called-Station-Id == "123456789", Autz-Type := Ldap
DEFAULT Realm == "other.company.com", Autz-Type := SQL
Autz-Type could also be used to select between multiple instances of
a module (ie sql or ldap) which have been configured differently. For
example based on the user realm different ldap servers (belonging to
different companies) could be queried. If Auth-Type was also set then we
could do both Authentication and Authorization with the user databases
belonging to other companies. In detail:
radiusd.conf::
authenticate{
Auth-Type customer1{
ldap1
}
Auth-Type customer2{
ldap2
}
}
authorize{
preprocess
suffix
Autz-Type customer1{
ldap1
}
Autz-Type customer2{
ldap2
}
files
}
The users file::
DEFAULT Realm == "customer1", Autz-Type := customer1, Auth-Type := customer1
DEFAULT Realm == "customer2", Autz-Type := customer2, Auth-Type := customer2
Apart from Autz-Type the server also supports the use of
Acct-Type, Session-Type and Post-Auth-Type for the corresponding sections.
The corresponding section names in the radiusd.conf file are the same. So for example:
users file::
DEFAULT Called-Station-Id == "236473", Session-Type := SQL
radiusd.conf::
session {
radutmp
Session-Type SQL {
sql
}
}
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