hi. I have a fresh install of freeradius on Centos7. I have been trying to connect via ldap to active directory for a few days now, but I still get this error: . . . . # Instantiating module "ldap" from file /etc/raddb/mods-enabled/ldap Mon Aug 15 10:54:30 2016 : Debug: ldap { Mon Aug 15 10:54:30 2016 : Debug: server = "xx.xx.xx." Mon Aug 15 10:54:30 2016 : Debug: port = 389 Mon Aug 15 10:54:30 2016 : Debug: password = "xxxxxx2016" Mon Aug 15 10:54:30 2016 : Debug: identity = "cn=xxxxx,dc=xxxxx,dc=xxx" Mon Aug 15 10:54:30 2016 : Debug: user { Mon Aug 15 10:54:30 2016 : Debug: filter = "(uid=%{%{Stripped-User-Name}:-%{User-Name}})" Mon Aug 15 10:54:30 2016 : Debug: scope = "sub" Mon Aug 15 10:54:30 2016 : Debug: base_dn = "xxxxxx,dc=xxx" Mon Aug 15 10:54:30 2016 : Debug: access_positive = yes Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: group { Mon Aug 15 10:54:30 2016 : Debug: filter = "(objectClass=posixGroup)" Mon Aug 15 10:54:30 2016 : Debug: scope = "sub" Mon Aug 15 10:54:30 2016 : Debug: base_dn = "dc=xxxxx,dc=xxx" Mon Aug 15 10:54:30 2016 : Debug: name_attribute = "cn" Mon Aug 15 10:54:30 2016 : Debug: membership_attribute = "memberOf" Mon Aug 15 10:54:30 2016 : Debug: cacheable_name = no Mon Aug 15 10:54:30 2016 : Debug: cacheable_dn = no Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: client { Mon Aug 15 10:54:30 2016 : Debug: filter = "(objectClass=frClient)" Mon Aug 15 10:54:30 2016 : Debug: scope = "sub" Mon Aug 15 10:54:30 2016 : Debug: base_dn = "dc=xxxxxx,dc=xxx" Mon Aug 15 10:54:30 2016 : Debug: attribute { Mon Aug 15 10:54:30 2016 : Debug: identifier = "radiusClientIdentifier" Mon Aug 15 10:54:30 2016 : Debug: shortname = "cn" Mon Aug 15 10:54:30 2016 : Debug: secret = "radiusClientSecret" Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: profile { Mon Aug 15 10:54:30 2016 : Debug: filter = "(&)" Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: options { Mon Aug 15 10:54:30 2016 : Debug: ldap_debug = 40 Mon Aug 15 10:54:30 2016 : Debug: chase_referrals = yes Mon Aug 15 10:54:30 2016 : Debug: rebind = yes Mon Aug 15 10:54:30 2016 : Debug: net_timeout = 1 Mon Aug 15 10:54:30 2016 : Debug: res_timeout = 20 Mon Aug 15 10:54:30 2016 : Debug: srv_timelimit = 20 Mon Aug 15 10:54:30 2016 : Debug: idle = 60 Mon Aug 15 10:54:30 2016 : Debug: probes = 3 Mon Aug 15 10:54:30 2016 : Debug: interval = 3 Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: tls { Mon Aug 15 10:54:30 2016 : Debug: start_tls = no Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Warning: rlm_ldap: Falling back to build time libldap version info. Query for LDAP_OPT_API_INFO returned: -1 Mon Aug 15 10:54:30 2016 : Info: rlm_ldap: libldap vendor: OpenLDAP version: 20439 Mon Aug 15 10:54:30 2016 : Debug: accounting { Mon Aug 15 10:54:30 2016 : Debug: reference = "%{tolower:type.%{Acct-Status-Type}}" Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: post-auth { Mon Aug 15 10:54:30 2016 : Debug: reference = "." Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap (ldap): Using local pool section Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap (ldap): No pool reference found in "ldap.pool" Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap (ldap): Initialising connection pool Mon Aug 15 10:54:30 2016 : Debug: pool { Mon Aug 15 10:54:30 2016 : Debug: start = 5 Mon Aug 15 10:54:30 2016 : Debug: min = 4 Mon Aug 15 10:54:30 2016 : Debug: max = 32 Mon Aug 15 10:54:30 2016 : Debug: spare = 3 Mon Aug 15 10:54:30 2016 : Debug: uses = 0 Mon Aug 15 10:54:30 2016 : Debug: lifetime = 0 Mon Aug 15 10:54:30 2016 : Debug: cleanup_interval = 30 Mon Aug 15 10:54:30 2016 : Debug: idle_timeout = 60 Mon Aug 15 10:54:30 2016 : Debug: retry_delay = 1 Mon Aug 15 10:54:30 2016 : Debug: spread = no Mon Aug 15 10:54:30 2016 : Debug: } Mon Aug 15 10:54:30 2016 : Info: rlm_ldap (ldap): Opening additional connection (0) Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap (ldap): Connecting to xx.x.xx.x:389 Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap: New libldap handle 0x7f4a86f06d20 Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap (ldap): Waiting for bind result... Mon Aug 15 10:54:30 2016 : Error: rlm_ldap (ldap): Bind credentials incorrect: Invalid credentials Mon Aug 15 10:54:30 2016 : Error: rlm_ldap (ldap): Server said: 80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext error, data 52e, v1db1. Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap: Closing libldap handle 0x7f4a86f06d20 Mon Aug 15 10:54:30 2016 : Error: rlm_ldap (ldap): Opening connection failed (0) Mon Aug 15 10:54:30 2016 : Debug: rlm_ldap (ldap): Removing connection pool Mon Aug 15 10:54:30 2016 : Error: /etc/raddb/mods-enabled/ldap[8]: Instantiation failed for module "ldap" What I found in google is that it might be a bad pass (52e), but password is correct and account is active.