Freeradius - LDAP Auth

10 Dec 2020

      Hello to everyone,

after reading the whole internet and searching for solutions, but finding a solution in vain, I try my luck here.

First of all, my goal: It should work quite simply. If you choose the WLAN you should be able to login with your LDAP - access data.

After trying a lot of things, the same or even new errors will appear again and again. 
The LDAP connection exists in any case. It finds the user in the exact OU. I tried it already with a certain group (so only if the user is in the group "wlan" he can login). He could also check the group.

My question is: Is it because of some config that it does not work, or is it because of the domain controller?

ldap.conf:
-----------------------------------------------------------------------------------------------
ldap {
server = "ldap://intranet.***.de <ldap://intranet.***.de>"
            identity = "INTRANET\*USERNAME*"
            password = "*******"
            base_dn = "DC=intranet,DC=DC,DC=de"

            sasl {
            }

update {
            control:Password-With-Header    += 'userPassword'
            control:                        += 'radiusControlAttribute'
            request:                        += 'radiusRequestAttribute'
           reply:                          += 'radiusReplyAttribute'
            }

user {
            base_dn = "${..base_dn}"
            filter = "(samaccountname=%{%{Stripped-User-Name}:-%{User-Name}})"
            sasl {
            }
        }

group {
            base_dn = 'DC=intranet,DC=*DC*,DC=de'
            filter = '(objectClass=posixGroup)'
            scope = 'sub'
            name_attribute = cn
            membership_filter = "(member=%{control:Ldap-UserDn})"
            membership_attribute = 'memberOf'
            }

Profile {
            }

client {
            base_dn = "${..base_dn}"
            filter = '(objectClass=radiusClient)'
            template {
            }
            attribute {
                        ipaddr                          = 'radiusClientIdentifier'
                        secret                          = 'radiusClientSecret'
            }
        }

accounting {
                reference = "%{tolower:type.%{Acct-Status-Type}}"

                type {
                        start {
                                update {
                                        description := "Online at %S"
                                }
                        }

                        interim-update {
                                update {
                                        description := "Last seen at %S"
                                }
                        }

                        stop {
                                update {
                                        description := "Offline at %S"
                                }
                        }
                }
        }

post-auth {
                update {
                        description := "Authenticated at %S"
                }
        }

options {
                chase_referrals = yes
                rebind = yes
                res_timeout = 10
                srv_timelimit = 3
                net_timeout = 1
                idle = 60
                probes = 3
                 interval = 3
                ldap_debug = 0x0028
        }

Tls {
}

pool {
                start = ${thread[pool].start_servers}
                min = ${thread[pool].min_spare_servers}
                max = ${thread[pool].max_servers}
                spare = ${thread[pool].max_spare_servers}
                uses = 0
                retry_delay = 30

    lifetime = 0
                idle_timeout = 60
        }
}

-----------------------------------------------------------------------------------------------

Site-enabled/default and Innertunnel:
-----------------------------------------------------------------------------------------------
The files are both still standard. The only thing I have added is: 

-ldap
        if ((ok || updated) && User-Password && !control:Auth-Type) {
                update {
                    control:Auth-Type := ldap
                }
            }

In the authorize-section.
-----------------------------------------------------------------------------------------------

FREERADIUS -X:
-----------------------------------------------------------------------------------------------
(7)   Received Access-Request Id 25 from *Accesspoint-IP* to *Radius-Server-IP:1812* length 371
(7)   User-Name = "*USERNAME*"
(7)   NAS-IP-Address = *AccessPoint-IP*
(7)   NAS-Identifier = "TP-Link:B0-BE-76-24-73-FF"
(7)   NAS-Port-Id = "00000001"
(7)   Called-Station-Id = "B0-BE-76-24-73-FF:ldap_auth"
(7)   NAS-Port-Type = Wireless-802.11
(7)   Event-Timestamp = "Nov 25 2020 11:52:42 UTC"
(7)   Service-Type = Framed-User
(7)   Calling-Station-Id = "6A-95-50-D9-1B-DC"
(7)   Connect-Info = "CONNECT 0Mbps 802.11b"
(7)   Acct-Session-Id = "b0be762473ff-357FC6FB8137FBBA"
(7)   Acct-Multi-Session-Id = "97193BFF112F1388"
(7)   WLAN-Pairwise-Cipher = 1027076
(7)   WLAN-Group-Cipher = 1027076
(7)   WLAN-AKM-Suite = 1027073
(7)   Framed-MTU = 1400
(7)   EAP-Message = 0x0238006219001703030057b1de21bae8c7f5d43e9cefcb5c41ba58ac82f19aea43c4ed3c21feb1a2c3d6372f73a55132eb0157bf9792ab55d4ba3674125df5a3bdace00a31a870f5207823f75aaca3a15aa1ba23107d8ccd9cc1f0da3abd0f10c8cb
(7)   State = 0x91de85df97e69c726c333a62068cc31c
(7)   Message-Authenticator = 0xd2c7816cb5763af4c1102989e178783a
(7) Restoring &session-state
(7)   &session-state:TLS-Session-Cipher-Suite = "ECDHE-RSA-AES256-GCM-SHA384"
(7)   &session-state:TLS-Session-Version = "TLS 1.2"
(7) # Executing section authorize from file /etc/freeradius/3.0/sites-enabled/default
(7)   authorize {
(7)     policy filter_username {
(7)       if (&User-Name) {
(7)       if (&User-Name)  -> TRUE
(7)       if (&User-Name)  {
(7)         if (&User-Name =~ / /) {
(7)         if (&User-Name =~ / /)  -> FALSE
(7)         if (&User-Name =~ /@[^@]*@/ ) {
(7)         if (&User-Name =~ /@[^@]*@/ )  -> FALSE
(7)         if (&User-Name =~ /\.\./ ) {
(7)         if (&User-Name =~ /\.\./ )  -> FALSE
(7)         if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))  {
(7)         if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))   -> FALSE
(7)         if (&User-Name =~ /\.$/)  {
(7)         if (&User-Name =~ /\.$/)   -> FALSE
(7)         if (&User-Name =~ /@\./)  {
(7)         if (&User-Name =~ /@\./)   -> FALSE
(7)       } # if (&User-Name)  = notfound
(7)     } # policy filter_username = notfound
(7)     [preprocess] = ok
(7)     [chap] = noop
(7)     [mschap] = noop
(7)     [digest] = noop
(7) suffix: Checking for suffix after "@"
(7) suffix: No '@' in User-Name = "*USERNAME*", looking up realm NULL
(7) suffix: No such realm "NULL"
(7)     [suffix] = noop
(7) eap: Peer sent EAP Response (code 2) ID 56 length 98
(7) eap: Continuing tunnel setup
(7)     [eap] = ok
(7)   } # authorize = ok
(7) Found Auth-Type = eap
(7) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(7)   authenticate {
(7) eap: Expiring EAP session with state 0x6d94a36d6dacb9f9
(7) eap: Finished EAP session with state 0x91de85df97e69c72
(7) eap: Previous EAP request found for state 0x91de85df97e69c72, released from the list
(7) eap: Peer sent packet with method EAP PEAP (25)
(7) eap: Calling submodule eap_peap to process data
(7) eap_peap: Continuing EAP-TLS
(7) eap_peap: [eaptls verify] = ok
(7) eap_peap: Done initial handshake
(7) eap_peap: [eaptls process] = ok
(7) eap_peap: Session established.  Decoding tunneled attributes
(7) eap_peap: PEAP state phase2
(7) eap_peap: EAP method MSCHAPv2 (26)
(7) eap_peap: Got tunneled request
(7) eap_peap:   EAP-Message = 0x023800431a0238003e31976c2f5de49266406d03aa536085bfe2000000000000000079adbba2193c9312ebf9719bd0060b3fc13cdb7f8f7aeece00666c6f7269616e62
(7) eap_peap: Setting User-Name to *USERNAME*
(7) eap_peap: Sending tunneled request to inner-tunnel
(7) eap_peap:   EAP-Message = 0x023800431a0238003e31976c2f5de49266406d03aa536085bfe2000000000000000079adbba2193c9312ebf9719bd0060b3fc13cdb7f8f7aeece00666c6f7269616e62
(7) eap_peap:   FreeRADIUS-Proxied-To = 127.0.0.1
(7) eap_peap:   User-Name = "*USERNAME*"
(7) eap_peap:   State = 0x6d94a36d6dacb9f97126b7451b802a00
(7) Virtual server inner-tunnel received request
(7)   EAP-Message = 0x023800431a0238003e31976c2f5de49266406d03aa536085bfe2000000000000000079adbba2193c9312ebf9719bd0060b3fc13cdb7f8f7aeece00666c6f7269616e62
(7)   FreeRADIUS-Proxied-To = 127.0.0.1
(7)   User-Name = "*USERNAME*"
(7)   State = 0x6d94a36d6dacb9f97126b7451b802a00
(7) WARNING: Outer and inner identities are the same.  User privacy is compromised.
(7) server inner-tunnel {
(7)   session-state: No cached attributes
(7)   # Executing section authorize from file /etc/freeradius/3.0/sites-enabled/inner-tunnel
(7)     authorize {
(7)       policy filter_username {
(7)         if (&User-Name) {
(7)         if (&User-Name)  -> TRUE
(7)         if (&User-Name)  {
(7)           if (&User-Name =~ / /) {
(7)           if (&User-Name =~ / /)  -> FALSE
(7)           if (&User-Name =~ /@[^@]*@/ ) {
(7)           if (&User-Name =~ /@[^@]*@/ )  -> FALSE
(7)           if (&User-Name =~ /\.\./ ) {
(7)           if (&User-Name =~ /\.\./ )  -> FALSE
(7)           if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))  {
(7)           if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))   -> FALSE
(7)           if (&User-Name =~ /\.$/)  {
(7)           if (&User-Name =~ /\.$/)   -> FALSE
(7)           if (&User-Name =~ /@\./)  {
(7)           if (&User-Name =~ /@\./)   -> FALSE
(7)         } # if (&User-Name)  = notfound
(7)       } # policy filter_username = notfound
(7)       [chap] = noop
(7)       [mschap] = noop
(7) suffix: Checking for suffix after "@"
(7) suffix: No '@' in User-Name = "*USERNAME*", looking up realm NULL
(7) suffix: No such realm "NULL"
(7)       [suffix] = noop
(7)       update control {
(7)         &Proxy-To-Realm := LOCAL
(7)       } # update control = noop
(7) eap: Peer sent EAP Response (code 2) ID 56 length 67
(7) eap: No EAP Start, assuming it's an on-going EAP conversation
(7)       [eap] = updated
(7)       [files] = noop
rlm_ldap (ldap): Reserved connection (1)
(7) ldap: EXPAND (samaccountname=%{%{Stripped-User-Name}:-%{User-Name}})
(7) ldap:    --> (samaccountname=*USERNAME*)
(7) ldap: Performing search in "DC=INTRANET,DC=*DC*,DC=de" with filter "(samaccountname=*USERNAME*)", scope "sub"
(7) ldap: Waiting for search result...
rlm_ldap (ldap): Rebinding to URL ldap://ForestDnsZones.INTRANET.*domain*.de/DC=ForestDnsZones,DC=*DC*,DC=*DC*,DC=de <ldap://ForestDnsZones.INTRANET.*domain*.de/DC=ForestDnsZones,DC=*DC*,DC=*DC*,DC=de>
rlm_ldap (ldap): Waiting for bind result...
rlm_ldap (ldap): Rebinding to URL ldap://DomainDnsZones.INTRANET.*domain*.de/DC=DomainDnsZones,DC=*DC*,DC=*DC*,DC=de <ldap://DomainDnsZones.INTRANET.*domain*.de/DC=DomainDnsZones,DC=*DC*,DC=*DC*,DC=de>
rlm_ldap (ldap): Waiting for bind result...
rlm_ldap (ldap): Bind successful
rlm_ldap (ldap): Bind successful
(7) ldap: User object found at DN "CN=Name Surname,OU=*OU*,OU=*OU*,OU=*OU*,OU=*OU*,DC=*DC*,DC=*DC,DC=*DC*"
(7) ldap: Processing user attributes
(7) ldap: WARNING: No "known good" password added. Ensure the admin user has permission to read the password attribute
(7) ldap: WARNING: PAP authentication will *NOT* work with Active Directory (if that is what you were trying to configure)
rlm_ldap (ldap): Deleting connection (1) - Was referred to a different LDAP server
(7)       [ldap] = ok
(7)       if ((ok || updated) && User-Password && !control:Auth-Type) {
(7)       if ((ok || updated) && User-Password && !control:Auth-Type)  -> FALSE
(7)       [expiration] = noop
(7)       [logintime] = noop
(7)       [pap] = noop
(7)     } # authorize = updated
(7)   Found Auth-Type = eap
(7)   # Executing group from file /etc/freeradius/3.0/sites-enabled/inner-tunnel
(7)     authenticate {
(7) eap: Expiring EAP session with state 0x6d94a36d6dacb9f9
(7) eap: Finished EAP session with state 0x6d94a36d6dacb9f9
(7) eap: Previous EAP request found for state 0x6d94a36d6dacb9f9, released from the list
(7) eap: Peer sent packet with method EAP MSCHAPv2 (26)
(7) eap: Calling submodule eap_mschapv2 to process data
(7) eap_mschapv2: # Executing group from file /etc/freeradius/3.0/sites-enabled/inner-tunnel
(7) eap_mschapv2:   authenticate {
(7) mschap: WARNING: No Cleartext-Password configured.  Cannot create NT-Password
(7) mschap: Creating challenge hash with username: *USERNAME*
(7) mschap: Client is using MS-CHAPv2
(7) mschap: ERROR: FAILED: No NT/LM-Password.  Cannot perform authentication
(7) mschap: ERROR: MS-CHAP2-Response is incorrect
(7) eap_mschapv2:     [mschap] = reject
(7) eap_mschapv2:   } # authenticate = reject
(7) eap: Sending EAP Failure (code 4) ID 56 length 4
(7) eap: Freeing handler
(7)       [eap] = reject
(7)     } # authenticate = reject
(7)   Failed to authenticate the user
(7)   Using Post-Auth-Type Reject
(7)   # Executing group from file /etc/freeradius/3.0/sites-enabled/inner-tunnel
(7)     Post-Auth-Type REJECT {
(7) attr_filter.access_reject: EXPAND %{User-Name}
(7) attr_filter.access_reject:    --> *USERNAME*
(7) attr_filter.access_reject: Matched entry DEFAULT at line 11
(7)       [attr_filter.access_reject] = updated
(7)       update outer.session-state {
(7)         &Module-Failure-Message := &request:Module-Failure-Message -> 'mschap: FAILED: No NT/LM-Password.  Cannot perform authentication'
(7)       } # update outer.session-state = noop
(7)     } # Post-Auth-Type REJECT = updated
(7) } # server inner-tunnel
(7) Virtual server sending reply
(7)   MS-CHAP-Error = "8E=691 R=1 C=6d62be4a6a391d62280be8faba594674 V=3 M=Authentication rejected"
(7)   EAP-Message = 0x04380004
(7)   Message-Authenticator = 0x00000000000000000000000000000000
(7) eap_peap: Got tunneled reply code 3
(7) eap_peap:   MS-CHAP-Error = "8E=691 R=1 C=6d62be4a6a391d62280be8faba594674 V=3 M=Authentication rejected"
(7) eap_peap:   EAP-Message = 0x04380004
(7) eap_peap:   Message-Authenticator = 0x00000000000000000000000000000000
(7) eap_peap: Got tunneled reply RADIUS code 3
(7) eap_peap:   MS-CHAP-Error = "8E=691 R=1 C=6d62be4a6a391d62280be8faba594674 V=3 M=Authentication rejected"
(7) eap_peap:   EAP-Message = 0x04380004
(7) eap_peap:   Message-Authenticator = 0x00000000000000000000000000000000
(7) eap_peap: Tunneled authentication was rejected
(7) eap_peap: FAILURE
(7) eap: Sending EAP Request (code 1) ID 57 length 46
(7) eap: EAP session adding &reply:State = 0x91de85df96e79c72
(7)     [eap] = handled
(7)   } # authenticate = handled
(7) Using Post-Auth-Type Challenge
(7) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(7)   Challenge { ... } # empty sub-section is ignored
(7) session-state: Saving cached attributes
(7)   TLS-Session-Cipher-Suite = "ECDHE-RSA-AES256-GCM-SHA384"
(7)   TLS-Session-Version = "TLS 1.2"
(7)   Module-Failure-Message := "mschap: FAILED: No NT/LM-Password.  Cannot perform authentication"
(7) Sent Access-Challenge Id 25 from *Radius-Server-IP:1812* to *Accesspoint-IP* length 0
(7)   EAP-Message = 0x0139002e1900170303002371c86c4f9605471aebfaa3b34ed5f06357d0eb547c2c853c97853ab157bee0b162981c
(7)   Message-Authenticator = 0x00000000000000000000000000000000
(7)   State = 0x91de85df96e79c726c333a62068cc31c
(7) Finished request
Waking up in 4.8 seconds.
(8) Received Access-Request Id 26 from *Accesspoint-IP* to *Radius-Server-IP:1812* length 319
(8)   User-Name = "*USERNAME*"
(8)   NAS-IP-Address = *AccessPoint-IP*
(8)   NAS-Identifier = "TP-Link:B0-BE-76-24-73-FF"
(8)   NAS-Port-Id = "00000001"
(8)   Called-Station-Id = "B0-BE-76-24-73-FF:ldap_auth"
(8)   NAS-Port-Type = Wireless-802.11
(8)   Event-Timestamp = "Nov 25 2020 11:52:42 UTC"
(8)   Service-Type = Framed-User
(8)   Calling-Station-Id = "6A-95-50-D9-1B-DC"
(8)   Connect-Info = "CONNECT 0Mbps 802.11b"
(8)   Acct-Session-Id = "b0be762473ff-357FC6FB8137FBBA"
(8)   Acct-Multi-Session-Id = "97193BFF112F1388"
(8)   WLAN-Pairwise-Cipher = 1027076
(8)   WLAN-Group-Cipher = 1027076
(8)   WLAN-AKM-Suite = 1027073
(8)   Framed-MTU = 1400
(8)   EAP-Message = 0x0239002e19001703030023b1de21bae8c7f5d5fe5ace2f015bb1493cfc51fce39ec097cb3b7adc33072b2fd5928f
(8)   State = 0x91de85df96e79c726c333a62068cc31c
(8)   Message-Authenticator = 0xd60eadff0ff86f1364a45131245674c1
(8) Restoring &session-state
(8)   &session-state:TLS-Session-Cipher-Suite = "ECDHE-RSA-AES256-GCM-SHA384"
(8)   &session-state:TLS-Session-Version = "TLS 1.2"
(8)   &session-state:Module-Failure-Message := "mschap: FAILED: No NT/LM-Password.  Cannot perform authentication"
(8) # Executing section authorize from file /etc/freeradius/3.0/sites-enabled/default
(8)   authorize {
(8)     policy filter_username {
(8)       if (&User-Name) {
(8)       if (&User-Name)  -> TRUE
(8)       if (&User-Name)  {
(8)         if (&User-Name =~ / /) {
(8)         if (&User-Name =~ / /)  -> FALSE
(8)         if (&User-Name =~ /@[^@]*@/ ) {
(8)         if (&User-Name =~ /@[^@]*@/ )  -> FALSE
(8)         if (&User-Name =~ /\.\./ ) {
(8)         if (&User-Name =~ /\.\./ )  -> FALSE
(8)         if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))  {
(8)         if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))   -> FALSE
(8)         if (&User-Name =~ /\.$/)  {
(8)         if (&User-Name =~ /\.$/)   -> FALSE
(8)         if (&User-Name =~ /@\./)  {
(8)         if (&User-Name =~ /@\./)   -> FALSE
(8)       } # if (&User-Name)  = notfound
(8)     } # policy filter_username = notfound
(8)     [preprocess] = ok
(8)     [chap] = noop
(8)     [mschap] = noop
(8)     [digest] = noop
(8) suffix: Checking for suffix after "@"
(8) suffix: No '@' in User-Name = "*USERNAME*", looking up realm NULL
(8) suffix: No such realm "NULL"
(8)     [suffix] = noop
(8) eap: Peer sent EAP Response (code 2) ID 57 length 46
(8) eap: Continuing tunnel setup
(8)     [eap] = ok
(8)   } # authorize = ok
(8) Found Auth-Type = eap
(8) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(8)   authenticate {
(8) eap: Expiring EAP session with state 0x91de85df96e79c72
(8) eap: Finished EAP session with state 0x91de85df96e79c72
(8) eap: Previous EAP request found for state 0x91de85df96e79c72, released from the list
(8) eap: Peer sent packet with method EAP PEAP (25)
(8) eap: Calling submodule eap_peap to process data
(8) eap_peap: Continuing EAP-TLS
(8) eap_peap: [eaptls verify] = ok
(8) eap_peap: Done initial handshake
(8) eap_peap: [eaptls process] = ok
(8) eap_peap: Session established.  Decoding tunneled attributes
(8) eap_peap: PEAP state send tlv failure
(8) eap_peap: Received EAP-TLV response
(8) eap_peap:   ERROR: The users session was previously rejected: returning reject (again.)
(8) eap_peap:   This means you need to read the PREVIOUS messages in the debug output
(8) eap_peap:   to find out the reason why the user was rejected
(8) eap_peap:   Look for "reject" or "fail".  Those earlier messages will tell you
(8) eap_peap:   what went wrong, and how to fix the problem
(8) eap: ERROR: Failed continuing EAP PEAP (25) session.  EAP sub-module failed
(8) eap: Sending EAP Failure (code 4) ID 57 length 4
(8) eap: Failed in EAP select
(8)     [eap] = invalid
(8)   } # authenticate = invalid
(8) Failed to authenticate the user
(8) Using Post-Auth-Type Reject
(8) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(8)   Post-Auth-Type REJECT {
(8) attr_filter.access_reject: EXPAND %{User-Name}
(8) attr_filter.access_reject:    --> *USERNAME*
(8) attr_filter.access_reject: Matched entry DEFAULT at line 11
(8)     [attr_filter.access_reject] = updated
(8)     [eap] = noop
(8)     policy remove_reply_message_if_eap {
(8)       if (&reply:EAP-Message && &reply:Reply-Message) {
(8)       if (&reply:EAP-Message && &reply:Reply-Message)  -> FALSE
(8)       else {
(8)         [noop] = noop
(8)       } # else = noop
(8)     } # policy remove_reply_message_if_eap = noop
(8)   } # Post-Auth-Type REJECT = updated
(8) Delaying response for 1.000000 seconds
Waking up in 0.3 seconds.
Waking up in 0.6 seconds.
(8) Sending delayed response
(8) Sent Access-Reject Id 26 from *Radius-Server-IP:1812* to *Accesspoint-IP* length 44
(8)   EAP-Message = 0x04390004
(8)   Message-Authenticator = 0x00000000000000000000000000000000
Waking up in 3.8 seconds.
(0) Cleaning up request packet ID 18 with timestamp +11
(1) Cleaning up request packet ID 19 with timestamp +11
(2) Cleaning up request packet ID 20 with timestamp +11
(3) Cleaning up request packet ID 21 with timestamp +11
(4) Cleaning up request packet ID 22 with timestamp +11
(5) Cleaning up request packet ID 23 with timestamp +11
(6) Cleaning up request packet ID 24 with timestamp +11
(7) Cleaning up request packet ID 25 with timestamp +11
(8) Cleaning up request packet ID 26 with timestamp +11
Ready to process requests

Sincerely yours

Florian Bergner

Freeradius - LDAP Auth

online＠berg-ner.de