Provided by: freeradius_1.1.7-1build4_i386 bug


       rlm_mschap - FreeRADIUS Module


       The  rlm_mschap  module  provides  MS-CHAP and MS-CHAPv2 authentication

       This module validates a user with MS-CHAP or MS-CHAPv2  authentication.
       It  should  be  listed in both the authorize and authenticate sections.
       In authorize, it will look for MS-CHAP Challenge/Response attributes in
       the Acess-Request, and configure itself to be the module called for the
       authenticate section.

       The  module  can  authenticate  the  MS-CHAP  session  via   plain-text
       passwords  (User-Password  attribute),  or  NT  passwords  (NT-Password
       attribute).  The module can perform authentication against an NT domain
       by using the ntlm_auth program.

SMB Integration

       The module also enforces the SMB-Account-Ctrl attribute.  See the Samba
       documentation for the meaning of SMB account control.  The module  does
       not  read  Samba password files.  Instead, the rlm_passwd module should
       be used to read a Samba password file, and  to  supply  an  NT-Password
       attribute  which  this module can use.  See the etc_smbpasswd module in
       radiusd.conf for more details.


       The main configuration items to be aware of are:

              Unless this is set to ’no’, FreeRADIUS  will  add  MS-CHAP-MPPE-
              Keys for MS-CHAPv1 and MS-MPPE-Recv-Key/MS-MPPE-Send-Key for MS-
              CHAPv2.  The default is ’yes’.

              If MPPE is enabled, setting this attribute to ’yes’  will  cause
              the  MS-MPPE-Encryption-Policy  attribute  to  be set to require
              encryption.  The default is ’no’.

              If MPPE is enabled, setting this attribute to ’yes’  will  cause
              the  MS-MPPE-Encryption-Types  attribute  to be set to require a
              128 bit key.  The default is ’no’.

              Windows clients send User-Name in the form of "DOMAIN\User", but
              send  the  challenge/response  based  only  on the User portion.
              Setting this value to yes, enables a work-around for this error.
              The default is ’no’.

              Use the ntlm_auth program for authentication against Samba, or a
              Windows NT or Active Directory Domain Controller.   For  machine
              authentication,  the  following  configuration  should  be used:
              ntlm_auth   =   "/path/to/ntlm_auth    --username=%{mschap:User-
              Name:-None}       --challenge=%{mschap:Challenge:-00}      --nt-
              response=%{mschap:NT-Response:-00}         --domain=%{mschap:NT-
              Domain:-YOUR_DEFAULT_DOMAIN}   If   configured,  ntlm_auth  will
              always be called, even if there is a clear-text  or  NT-Password
              available  for the user.  You can force ntlm_auth to not be used
              by setting MS-CHAP-Use-NTLM-Auth := No in the users file, or  in
              a database such as SQL.


       authorization, authentication




       radiusd(8), radiusd.conf(5)


       Chris Parker,

                                  19 May 2006                    rlm_mschap(5)