Trouble authenticating against samba 4 DC
Hugo Thebas
thebashugo at gmail.com
Thu Aug 3 21:51:30 CEST 2017
Hello, I've just set up a DC controller using samba 4 on Debian 9 and
FreeRADIUS 3
root at dc:~# samba -V
Version 4.5.8-Debian
root at dc:~# uname -a
Linux dc 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u2 (2017-06-26) x86_64
GNU/Linux
root at dc:~# freeradius -v
radiusd: FreeRADIUS Version 3.0.12, for host x86_64-pc-linux-gnu, built
on May 30 2017 at 15:18:34
Samba DC is running OK, i can authenticate against it using ntlm_auth
root at dc:~# ntlm_auth --request-nt-key --domain=CCBPINHAIS
--username=teste-login --password=Thebas at 1234
NT_STATUS_OK: Success (0x0)
I've followed the setup tutorial at:
http://deployingradius.com/documents/configuration/active_directory.html
and everything works fine until the part that I setup mschap, the test
using the config "DEFAULT Auth-Type = ntlm_auth" at users file is
OK, but when I remove the test config and setup mschap I cant
authenticate, I'll post the debug log below and aprreciate if anyone can
help me.
First the output using test config:
root at dc:~# radtest teste-login Thebas at 1234 localhost 0 testing123
Sent Access-Request Id 152 from 0.0.0.0:59761 to 127.0.0.1:1812 length 81
User-Name = "teste-login"
User-Password = "Thebas at 1234"
NAS-IP-Address = 172.16.100.254
NAS-Port = 0
Message-Authenticator = 0x00
Cleartext-Password = "Thebas at 1234"
Received Access-Accept Id 152 from 127.0.0.1:1812 to 0.0.0.0:0 length 20
Now removing the test config and using mschap:
root at dc:~# radtest -t mschap teste-login Thebas at 1234 localhost 0 testing123
Sent Access-Request Id 41 from 0.0.0.0:41126 to 127.0.0.1:1812 length 137
User-Name = "teste-login"
MS-CHAP-Password = "Thebas at 1234"
NAS-IP-Address = 172.16.100.254
NAS-Port = 0
Message-Authenticator = 0x00
Cleartext-Password = "Thebas at 1234"
MS-CHAP-Challenge = 0x5c2a896e7b319f2f
MS-CHAP-Response =
0x000100000000000000000000000000000000000000000000000073a248201d2f5611be653fd75e48b46b9e08d049cb60122d
Received Access-Reject Id 41 from 127.0.0.1:1812 to 0.0.0.0:0 length 61
MS-CHAP-Error = "\000E=691 R=1 C=81c1063947fe901b V=2"
(0) -: Expected Access-Accept got Access-Reject
Below is the debug log:
(0) Received Access-Request Id 41 from 127.0.0.1:41126 to 127.0.0.1:1812
length 137
(0) User-Name = "teste-login"
(0) NAS-IP-Address = 172.16.100.254
(0) NAS-Port = 0
(0) Message-Authenticator = 0x97d3daecfc41cd5c63cca87fcae738c8
(0) MS-CHAP-Challenge = 0x5c2a896e7b319f2f
(0) MS-CHAP-Response =
0x000100000000000000000000000000000000000000000000000073a248201d2f5611be653fd75e48b46b9e08d049cb60122d
(0) # Executing section authorize from file
/etc/freeradius/3.0/sites-enabled/default
(0) authorize {
(0) policy filter_username {
(0) if (&User-Name) {
(0) if (&User-Name) -> TRUE
(0) if (&User-Name) {
(0) if (&User-Name =~ / /) {
(0) if (&User-Name =~ / /) -> FALSE
(0) if (&User-Name =~ /@[^@]*@/ ) {
(0) if (&User-Name =~ /@[^@]*@/ ) -> FALSE
(0) if (&User-Name =~ /\.\./ ) {
(0) if (&User-Name =~ /\.\./ ) -> FALSE
(0) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) {
(0) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))
-> FALSE
(0) if (&User-Name =~ /\.$/) {
(0) if (&User-Name =~ /\.$/) -> FALSE
(0) if (&User-Name =~ /@\./) {
(0) if (&User-Name =~ /@\./) -> FALSE
(0) } # if (&User-Name) = notfound
(0) } # policy filter_username = notfound
(0) [preprocess] = ok
(0) [chap] = noop
(0) mschap: Found MS-CHAP attributes. Setting 'Auth-Type = mschap'
(0) [mschap] = ok
(0) [digest] = noop
(0) suffix: Checking for suffix after "@"
(0) suffix: No '@' in User-Name = "teste-login", looking up realm NULL
(0) suffix: No such realm "NULL"
(0) [suffix] = noop
(0) eap: No EAP-Message, not doing EAP
(0) [eap] = noop
(0) [files] = noop
(0) [expiration] = noop
(0) [logintime] = noop
(0) pap: WARNING: No "known good" password found for the user. Not
setting Auth-Type
(0) pap: WARNING: Authentication will fail unless a "known good"
password is available
(0) [pap] = noop
(0) } # authorize = ok
(0) Found Auth-Type = mschap
(0) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(0) authenticate {
(0) mschap: Client is using MS-CHAPv1 with NT-Password
(0) mschap: Executing: /usr/bin/ntlm_auth --request-nt-key
--username=%{mschap:User-Name:-None}
--domain=%{%{mschap:NT-Domain}:-CCBPINHAIS}
--challenge=%{mschap:Challenge:-00} --nt-response=%{mschap:NT-Response:-00}:
(0) mschap: EXPAND --username=%{mschap:User-Name:-None}
(0) mschap: --> --username=teste-login
(0) mschap: ERROR: No NT-Domain was found in the User-Name
(0) mschap: EXPAND --domain=%{%{mschap:NT-Domain}:-CCBPINHAIS}
(0) mschap: --> --domain=CCBPINHAIS
(0) mschap: mschap1: 5c
(0) mschap: EXPAND --challenge=%{mschap:Challenge:-00}
(0) mschap: --> --challenge=5c2a896e7b319f2f
(0) mschap: EXPAND --nt-response=%{mschap:NT-Response:-00}
(0) mschap: -->
--nt-response=73a248201d2f5611be653fd75e48b46b9e08d049cb60122d
(0) mschap: ERROR: Program returned code (1) and output 'Logon failure
(0xc000006d)'
(0) mschap: External script failed
(0) mschap: ERROR: External script says: Logon failure (0xc000006d)
(0) mschap: ERROR: MS-CHAP2-Response is incorrect
(0) [mschap] = reject
(0) } # authenticate = reject
(0) Failed to authenticate the user
(0) Using Post-Auth-Type Reject
(0) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(0) Post-Auth-Type REJECT {
(0) attr_filter.access_reject: EXPAND %{User-Name}
(0) attr_filter.access_reject: --> teste-login
(0) attr_filter.access_reject: Matched entry DEFAULT at line 11
(0) [attr_filter.access_reject] = updated
(0) [eap] = noop
(0) policy remove_reply_message_if_eap {
(0) if (&reply:EAP-Message && &reply:Reply-Message) {
(0) if (&reply:EAP-Message && &reply:Reply-Message) -> FALSE
(0) else {
(0) [noop] = noop
(0) } # else = noop
(0) } # policy remove_reply_message_if_eap = noop
(0) } # Post-Auth-Type REJECT = updated
(0) Delaying response for 1.000000 seconds
Waking up in 0.2 seconds.
Waking up in 0.7 seconds.
(0) Sending delayed response
(0) Sent Access-Reject Id 41 from 127.0.0.1:1812 to 127.0.0.1:41126
length 61
(0) MS-CHAP-Error = "\000E=691 R=1 C=81c1063947fe901b V=2"
Waking up in 3.9 seconds.
(0) Cleaning up request packet ID 41 with timestamp +4
Stripping the debug log, the error lines are:
(0) mschap: ERROR: No NT-Domain was found in the User-Name
...
0) mschap: ERROR: Program returned code (1) and output 'Logon failure
(0xc000006d)'
(0) mschap: External script failed
(0) mschap: ERROR: External script says: Logon failure (0xc000006d)
(0) mschap: ERROR: MS-CHAP2-Response is incorrect
(0) [mschap] = reject
I think the problem has something about that last error about
MS-CHAP2-Response, but I don't have a clue what it could it be, I also
noticed that radtest sent a MS-CHAPv1 auth request, is it OK?
Thank you very much.
Best Reagrds,
Hugo Thebas
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