Ubuntu
adcli package

  1. Bug #1906627
  2. Comment #0

Comment 0 for bug 1906627

Revision history for this message
Rolf Fujino (silaena) wrote : adcli fails, can't contact LDAP server

Package: adcli
Version: 0.8.2-1ubuntu1
Release: Ubuntu 18.04 LTS

When trying to join the domain with this new version of adcli, it gets to the point of 'Using GSS-SPNEGO for SASL bind' and then it will not do anything for 10 minutes. It will then fail, complaining it can't reach the LDAP server.

Logs:
Dec 03 01:39:50 example001.domain.com realmd[6419]: * Authenticated as user: <email address hidden>
Dec 03 01:39:50 example001.domain.com adcli[6459]: GSSAPI client step 1
Dec 03 01:39:50 example001.domain.com realmd[6419]: * Authenticated as user: <email address hidden>
Dec 03 01:39:50 example001.domain.com adcli[6459]: GSSAPI client step 1
Dec 03 01:39:50 example001.domain.com realmd[6419]: * Using GSS-SPNEGO for SASL bind
Dec 03 01:39:50 example001.domain.com realmd[6419]: * Using GSS-SPNEGO for SASL bind
Dec 03 01:39:50 example001.domain.com adcli[6459]: GSSAPI client step 1
Dec 03 01:55:27 example001.domain.com realmd[6419]: ! Couldn't lookup domain short name: Can't contact LDAP server
Dec 03 01:55:27 example001.domain.com realmd[6419]: ! Couldn't lookup domain short name: Can't contact LDAP server
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using fully qualified name: example001.domain.com
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using fully qualified name: example001.domain.com
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using domain name: domain.com
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using domain name: domain.com
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using computer account name: EXAMPLE001
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using computer account name: EXAMPLE001
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using domain realm: domain.com
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using domain realm: domain.com
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Calculated computer account name from fqdn: EXAMPLE001
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Calculated computer account name from fqdn: EXAMPLE001
Dec 03 01:55:27 example001.domain.com realmd[6419]: * With user principal: <email address hidden>
Dec 03 01:55:27 example001.domain.com realmd[6419]: * With user principal: <email address hidden>
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Generated 120 character computer password
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Generated 120 character computer password
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using keytab: FILE:/etc/krb5.keytab
Dec 03 01:55:27 example001.domain.com realmd[6419]: * Using keytab: FILE:/etc/krb5.keytab
Dec 03 01:55:27 example001.domain.com realmd[6419]: ! Couldn't lookup computer account: EXAMPLE001$: Can't contact LDAP server
Dec 03 01:55:27 example001.domain.com realmd[6419]: ! Couldn't lookup computer account: EXAMPLE001$: Can't contact LDAP server
Dec 03 01:55:27 example001.domain.com realmd[6419]: adcli: joining domain domain.com failed: Couldn't lookup computer account: EXAMPLE001$: Can't contact LDAP server
Dec 03 01:55:27 example001.domain.com realmd[6419]: adcli: joining domain domain.com failed: Couldn't lookup computer account: EXAMPLE001$: Can't contact LDAP server
Dec 03 01:55:27 example001.domain.com realmd[6419]: process exited: 6459
Dec 03 01:55:27 example001.domain.com realmd[6419]: ! Failed to join the domain
Dec 03 01:55:27 example001.domain.com realmd[6419]: ! Failed to join the domain

On the network level, adcli gets to the point of send an ldap query to the domain controller and the domain controller returns an ack tcp packet, but then there is no more traffic between the domain controller and the server except for ntp packets until it fails.

The domain controller traffic also shows that it is receiving the ldap query packet from the server but it never sends a reply and there is no log in directory services regarding the query. We also couldn't find anything in procmon regarding this query either.

Workaround/Fix:
Downgrading the adcli package back to version 0.8.2-1 fixes the issues and domain join works properly again.