He instalado openLDAP, MIT Kerberos y SSD en sistemas Debian 10 según este tutorialProveedor Kerberos-OpenLDAP integrado en Debian squeeze.
Cada uno de los tres componentes está en su propio contenedor Proxmox LXC.
ldap: 192.168.1.120 (ldap2)
Kerberos: 192.168.1.128 (kerb)
Cliente con SSD: 192.168.1.129 (prueba)
Las IP se pueden resolver mediante DNS.
El problema:
cuando llamo 'id nombre de usuario' no obtengo ningún resultado.
Pero con el mismo filtro obtengo un resultado con ldapsearch.
Inicie sesión en el Cliente después de 'id test05' (nivel de registro SSD 6)
==> /var/log/sssd/sssd_nss.log <==
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [accept_fd_handler] (0x0400): Client connected!
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_cmd_get_version] (0x0200): Received client version [1].
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_cmd_get_version] (0x0200): Offered version [1].
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [nss_getby_name] (0x0400): Input name: test05
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_send] (0x0400): CR #1: New request 'User by name'
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_process_input] (0x0400): CR #1: Parsing input name [test05]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_parse_name_for_domains] (0x0200): name 'test05' matched without domain, user is test05
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_set_name] (0x0400): CR #1: Setting name [test05]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_select_domains] (0x0400): CR #1: Performing a multi-domain search
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_domains] (0x0400): CR #1: Search will check the cache and check the data provider
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_set_domain] (0x0400): CR #1: Using domain [xxxxxxx.net]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_prepare_domain_data] (0x0400): CR #1: Preparing input data for domain [xxxxxxx.net] rules
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_send] (0x0400): CR #1: Looking up [email protected]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_ncache] (0x0400): CR #1: Checking negative cache for [[email protected]]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_ncache] (0x0400): CR #1: [[email protected]] is not present in negative cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_cache] (0x0400): CR #1: Looking up [[email protected]] in cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_cache] (0x0400): CR #1: Object [[email protected]] was not found in cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #1: Looking up [[email protected]] in data provider
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_dp_issue_request] (0x0400): Issuing request for [0x55bd0978aee0:1:[email protected]@xxxxxxx.net]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_dp_get_account_msg] (0x0400): Creating request for [xxxxxxx.net][0x1][BE_REQ_USER][[email protected]:-]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_dp_internal_get_send] (0x0400): Entering request [0x55bd0978aee0:1:[email protected]@xxxxxxx.net]
==> /var/log/sssd/sssd_xxxxxxx.net.log <==
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_get_account_info_handler] (0x0200): Got request for [0x1][BE_REQ_USER][[email protected]]
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_attach_req] (0x0400): DP Request [Account #3]: New request. Flags [0x0001].
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_attach_req] (0x0400): Number of active DP request: 1
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [sdap_search_user_next_base] (0x0400): Searching for users with base [ou=users,dc=lan,dc=xxxxxxx,dc=net]
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [sdap_get_generic_ext_step] (0x0400): calling ldap_search_ext with [(&(uid=test05)(objectclass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))][ou=users,dc=lan,dc=xxxxxxx,dc=net].
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [sdap_get_generic_op_finished] (0x0400): Search result: No such object(32), no errmsg set
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [sdap_search_user_process] (0x0400): Search for users, returned 0 results.
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [sysdb_search_by_name] (0x0400): No such entry
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [sysdb_delete_user] (0x0400): Error: 2 (No such file or directory)
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_req_done] (0x0400): DP Request [Account #3]: Request handler finished [0]: Success
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [_dp_req_recv] (0x0400): DP Request [Account #3]: Receiving request data.
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_req_reply_list_success] (0x0400): DP Request [Account #3]: Finished. Success.
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_table_value_destructor] (0x0400): Removing [0:1:0x0001:1::xxxxxxx.net:[email protected]] from reply table
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_req_destructor] (0x0400): DP Request [Account #3]: Request removed.
(Thu Jan 16 16:03:48 2020) [sssd[be[xxxxxxx.net]]] [dp_req_destructor] (0x0400): Number of active DP request: 0
==> /var/log/sssd/sssd_nss.log <==
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_cache] (0x0400): CR #1: Looking up [[email protected]] in cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_cache] (0x0400): CR #1: Object [[email protected]] was not found in cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_search_ncache_add_to_domain] (0x0400): CR #1: Adding [[email protected]] to negative cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_ncache_set_str] (0x0400): Adding [NCE/USER/xxxxxxx.net/[email protected]] to negative cache
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [cache_req_process_result] (0x0400): CR #1: Finished: Not found
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [sss_dp_req_destructor] (0x0400): Deleting request: [0x55bd0978aee0:1:[email protected]@xxxxxxx.net]
(Thu Jan 16 16:03:48 2020) [sssd[nss]] [client_recv] (0x0200): Client disconnected!
/var/log/syslog en el host ldap2 (solo 3 líneas con nivel de registro 256)
Jan 16 16:03:48 ldap2 slapd[238]: conn=1067 op=6 SRCH base="ou=users,dc=lan,dc=xxxxxxx,dc=net" scope=2 deref=0 filter="(&(uid=test05)(objectClass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))"
Jan 16 16:03:48 ldap2 slapd[238]: conn=1067 op=6 SRCH attr=objectClass uid userPassword uidNumber gidNumber gecos homeDirectory loginShell krbPrincipalName cn modifyTimestamp modifyTimestamp shadowLastChange shadowMin shadowMax shadowWarning shadowInactive shadowExpire shadowFlag krbLastPwdChange krbPasswordExpiration pwdAttribute authorizedService accountExpires userAccountControl nsAccountLock host rhost loginDisabled loginExpirationTime loginAllowedTimeMap sshPublicKey userCertificate;binary mail
Jan 16 16:03:48 ldap2 slapd[238]: conn=1067 op=6 SEARCH RESULT tag=101 err=32 nentries=0 text=
Como puede ver, la búsqueda de openLDAP se llama con
la base: ou=users,dc=lan,dc=xxxxxxx,dc=net
filter:
(&(uid=test05)(objectclass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))
Cuando hago esta búsqueda directamente en el host openLDAP obtengo un resultado:
ldapsearch -Y GSSAPI -b ou=users,dc=lan,dc=xxxxxxx,dc=net "(&(uid=test05)(objectclass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))" cn uid
SASL/GSSAPI authentication started
SASL username: [email protected]
SASL SSF: 256
SASL data security layer installed.
# extended LDIF
#
# LDAPv3
# base <ou=users,dc=lan,dc=xxxxxxx,dc=net> with scope subtree
# filter: (&(uid=test05)(objectclass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))
# requesting: cn uid
#
.
# test05, users, lan.xxxxxxx.net
dn: uid=test05,ou=users,dc=lan,dc=xxxxxxx,dc=net
cn: test05
uid: test05
/var/log/syslog en el host ldap2
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 fd=24 ACCEPT from IP=[::1]:37252 (IP=[::]:389)
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=0 BIND dn="" method=163
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=0 RESULT tag=97 err=14 text=SASL(0): successful result:
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=1 BIND dn="" method=163
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=1 RESULT tag=97 err=14 text=SASL(0): successful result:
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=2 BIND dn="" method=163
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=2 BIND authcid="[email protected]" authzid="[email protected]"
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=2 BIND dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" mech=GSSAPI sasl_ssf=256 ssf=256
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=2 RESULT tag=97 err=0 text=
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=3 SRCH base="ou=users,dc=lan,dc=xxxxxxx,dc=net" scope=2 deref=0 filter="(&(uid=test05)(objectClass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))"
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=3 SRCH attr=cn uid
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=3 SEARCH RESULT tag=101 err=0 nentries=1 text=
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 op=4 UNBIND
Jan 16 16:19:08 ldap2 slapd[238]: conn=1068 fd=24 closed
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 fd=24 ACCEPT from IP=[::1]:37254 (IP=[::]:389)
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=0 BIND dn="" method=163
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=0 RESULT tag=97 err=14 text=SASL(0): successful result:
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=1 BIND dn="" method=163
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=1 RESULT tag=97 err=14 text=SASL(0): successful result:
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=2 BIND dn="" method=163
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=2 BIND authcid="[email protected]" authzid="[email protected]"
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=2 BIND dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" mech=GSSAPI sasl_ssf=256 ssf=256
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=2 RESULT tag=97 err=0 text=
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=3 SRCH base="ou=users,dc=lan,dc=xxxxxxx,dc=net" scope=2 deref=0 filter="(&(uid=test05)(objectClass=posixAccount)(uid=*)(&(uidNumber=*)(!(uidNumber=0))))"
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=3 SRCH attr=cn uid
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=3 SEARCH RESULT tag=101 err=0 nentries=1 text=
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 op=4 UNBIND
Jan 16 16:19:30 ldap2 slapd[238]: conn=1069 fd=24 closed
Mi configuración SSSD
cat /etc/sssd/sssd.conf
[sssd]
config_file_version = 2
services = nss, pam
domains = xxxxxxx.net
[nss]
debug_level = 6
override_shell = /bin/bash
filter_users = root
filter_groups = root
[pam]
offline_credentials_expiration = 60
[domain/xxxxxxx.net]
# A domain with identities provided by LDAP and authentication by Kerberos
debug_level = 6
cache_credentials = true
# -- Authentication provider --
auth_provider = krb5
krb5_server = kerb.xxxxxxx.net
krb5_realm = XXXXXXX.NET
krb5_ccachedir = /tmp
# -- Access provider --
access_provider = permit
# -- Change Password provider --
chpass_provider = krb5
# -- Identity provider --
id_provider = ldap
ldap_uri = ldap://ldap2.xxxxxxx.net
ldap_search_base = dc=lan,dc=xxxxxxx,dc=net
ldap_user_search_base = ou=users,dc=lan,dc=xxxxxxx,dc=net
ldap_sasl_mech = GSSAPI
ldap_sasl_authid = host/test.xxxxxxx.net
ldap_krb5_keytab = /etc/ldap/ldap.keytab
ldap_krb5_init_creds = true
# -- SUDO provider --
sudo_provider = none
Esta es mi configuración LDAP
# config
dn: cn=config
objectClass: olcGlobal
cn: config
olcArgsFile: /var/run/slapd/slapd.args
olcAuthzRegexp: {0}"uid=ldapadm,cn=XXXXXXX.NET,cn=gssapi,cn=auth" "cn=admin,
dc=lan,dc=xxxxxxx,dc=net"
olcAuthzRegexp: {1}"uid=([^,]+),cn=gssapi,cn=auth" "uid=$1,ou=users,dc=lan,dc=
xxxxxxx,dc=net"
olcAuthzRegexp: {2}"uid=([^,]+),cn=XXXXXXX.NET,cn=gssapi,cn=auth" "uid=$1,ou
=users,dc=lan,dc=xxxxxxx,dc=net"
olcAuthzRegexp: {3}"uid=host/([^,]+).XXXXXXX.NET,cn=xxxxxxx.net,cn=gssapi,
cn=auth" "cn=$1,ou=hosts,dc=lan,dc=xxxxxxx,dc=net"
olcDisallows: bind_anon
olcLogLevel: 256
olcPidFile: /var/run/slapd/slapd.pid
olcRequires: authc
olcSaslHost: ldap2.xxxxxxx.net
olcSaslRealm: XXXXXXX.NET
olcTLSCACertificateFile: /etc/ssl/openldap/certs/ca-chain-cert.pem
olcTLSCertificateFile: /etc/ssl/openldap/certs/ldap2-server-cert.pem
olcTLSCertificateKeyFile: /etc/ssl/openldap/private/ldap2-server-key.pem
olcTLSProtocolMin: 3.1
olcToolThreads: 1
# {0}config, config
dn: olcDatabase={0}config,cn=config
objectClass: olcDatabaseConfig
olcDatabase: {0}config
olcAccess: {0}to * by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external
,cn=auth manage by * break
olcRootDN: cn=admin,cn=config
# {1}mdb, config
dn: olcDatabase={1}mdb,cn=config
objectClass: olcDatabaseConfig
objectClass: olcMdbConfig
olcDatabase: {1}mdb
olcDbDirectory: /var/lib/ldap
olcSuffix: dc=lan,dc=xxxxxxx,dc=net
olcAccess: {0}to attrs=userPassword,shadowLastChange by dn="cn=admin,dc=lan,dc
=xxxxxxx,dc=net" write by dn="cn=sssdman,ou=manager,dc=lan,dc=xxxxxxx,dc=
net" read by dn="cn=mailman,ou=vmail,ou=services,dc=lan,dc=xxxxxxx,dc=net"
read by self write by anonymous auth by * none
olcAccess: {1}to dn.base="" by * read
olcAccess: {2}to dn.subtree="ou=vmail,ou=services,dc=lan,dc=xxxxxxx,dc=net"
by dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write by dn="cn=mailman,ou=vmail,
ou=services,dc=lan,dc=xxxxxxx,dc=net" read by self write by anonymous auth
by * none
olcAccess: {3}to dn.subtree="cn=krb5,ou=services,dc=lan,dc=xxxxxxx,dc=net" b
y dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write by dn="cn=adm-srv,cn=krb5,ou
=services,dc=lan,dc=xxxxxxx,dc=net" write by dn="cn=kdc-srv,cn=krb5,ou=serv
ices,dc=lan,dc=xxxxxxx,dc=net" read by * none
olcAccess: {4}to * by dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write by dn="cn
=sssdman,ou=manager,dc=lan,dc=xxxxxxx,dc=net" read by self write by anonymo
us auth by * none
olcLastMod: TRUE
olcRootDN: cn=admin,dc=lan,dc=xxxxxxx,dc=net
olcRootPW: {SSHA}...
Estoy luchando con este problema desde hace dos días. Google no fue de ayuda.
¿Alguien puede ayudarme a solucionar este problema?
Respuesta1
Sus declaraciones de olcAccess son demasiado estrictas para permitir que el principal utilizado por sssd lea los datos que desea que vea.
La línea ofensiva es:
olcAccess: {4}to *
by dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write
by dn="cn=sssdman,ou=manager,dc=lan,dc=xxxxxxx,dc=net" read
by self write
by anonymous auth
by * none
Probablemente quieras algo como:
olcAccess: {4}to *
by dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write
by dn="cn=sssdman,ou=manager,dc=lan,dc=xxxxxxx,dc=net" read
by dn.one="ou=hosts,dc=lan,dc=xxxxxxx,dc=net"
by self write
by anonymous auth
by * none
Esto supone que su olcAuthzRegexp: {3}declaración funciona como usted desea, pero también lo verificaría para asegurarme de eso. ( kinit -ky ldapwhoami -Yserán tus amigos por eso).
También puedes crear un olcAccess más específico con to attrs=@posixAccount,@posixGroup by ....
Respuesta2
Muchas gracias por su respuesta. Tienes toda la razón.
No pensé en un error de autenticación porque no hay ningún mensaje al respecto en los registros.
Cuando cambio la declaración olcAccess a
olcAccess: {4}to *
by dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write
by dn="cn=sssdman,ou=manager,dc=lan,dc=xxxxxxx,dc=net" read
by self write
by anonymous auth
by * read <--- this works, but it is not what I want
funciona.
Luego cambié mi configuración según tus sugerencias y todo está bien. Aquí están los cambios que hice:
- cambió la declaración olcAuthzRegexp a
dn: cn=config
add: olcAuthzRegexp
olcAuthzRegexp: "uid=host/([^,]+).xxxxxxx.net,cn=gssapi,cn=auth" "cn=$1,ou=hosts,ou=sssd,ou=services,dc=lan,dc=xxxxxxx,dc=net"
dn: cn=config
add: olcAuthzRegexp
olcAuthzRegexp: "uid=host/([^,]+).xxxxxxx.net,cn=XXXXXXX.NET,cn=gssapi,cn=auth" "cn=$1,ou=hosts,ou=sssd,ou=services,dc=lan,dc=xxxxxxx,dc=net"
Esmuy importanteque estas entradas de host están antes de las entradas de uid. De lo contrario, obtendrá una coincidencia para un host con el mapeo de uid.
- cambió la declaración olcAccess a
olcAccess: {4}to *
by dn="cn=admin,dc=lan,dc=xxxxxxx,dc=net" write
by dn="cn=sssdman,ou=manager,dc=lan,dc=xxxxxxx,dc=net" read
by dn.one="ou=hosts,ou=sssd,ou=services,dc=lan,dc=xxxxxxx,dc=net" read
by self write
by anonymous auth
by * none
- agregó la 'prueba' del host a la nueva ubicación en el DIT
dn: cn=test,ou=hosts,ou=sssd,ou=services,dc=lan,dc=xxxxxxx,dc=net
cn: test
objectclass: device
objectclass: hostObject
objectclass: authorizedServiceObject
objectclass: top
authorizedService: host
host: test.nottebrok.net
description: Test Host