rlm_mschap(5) FreeRADIUS Module rlm_mschap(5)NAMErlm_mschap - FreeRADIUS Module
DESCRIPTION
The rlm_mschap module provides MS-CHAP and MS-CHAPv2 authentication
support.
This module validates a user with MS-CHAP or MS-CHAPv2 authentication.
If called in Authorize, it will look for MS-CHAP Challenge/Response
attributes in the Acess-Request and adds an Auth-Type attribute set to
MS-CHAP in the Config-Items list unless Auth-Type has already set.
The module can authenticate the MS-CHAP session via plain-text pass‐
words (User-Password attribute), or NT passwords (NT-Password
attribute). The module cannot perform authentication against an NT
domain.
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 fIrlm_passwd module can be
used to read a Samba password file, and supply an NT-Password attribute
which this module can use.
The main configuration items to be aware of are:
authtype
This is the string used to set the authtype. Normally it should
be left to the default value of MS-CHAP.
use_mppe
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'.
require_encryption
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'.
require_strong
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'.
with_ntdomain_hack
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'.
CONFIGURATION
modules {
...
mschap {
authtype = MS-CHAP
use_mppe = yes
}
...
}
...
authorize {
...
mschap
...
}
...
authenticate {
...
mschap
...
}
SECTIONS
authorization, authentication
FILES
/etc/raddb/radiusd.conf
SEE ALSOradiusd(8), radiusd.conf(5)AUTHOR
Chris Parker, cparker@segv.org
13 March 2004 rlm_mschap(5)
