Thread: Problems joining Active Directory (DNS update failed)

server: windows 2008 r2
client: ubuntu 12.04

i'm trying add ubuntu client active directory domain controller, 1 of 2 errors:

error #1

code:

sudo net ads join -u administrator  enter administrator's password:  kinit succeeded ads_sasl_spnego_krb5_bind failed: sasl bind in progress  failed join domain: failed connect ad: sasl bind in progress

error #2

code:

sudo net ads join -u administrator  enter administrator's password:  using short domain name -- testsupsi  joined 'vmdc1' realm 'testsupsi.ch'  dns update vmdc1.dti.supsi.ch failed: error_dns_gss_error  dns update failed!

here's copy of configuration files:

/etc/krb5.conf

code:

    [appdefault]      pam = {         realm = testsupsi.ch         ticket_lifetime = 1d         renew_lifetime = 1d         forwardable = true         proxiable = false              retain_after_close = false              minimum_uid = 2              try_first_pass = true              ignore_root = true      }        [libdefaults]         default_realm = testsupsi.ch              default_keytab_name = file:/etc/krb5.keytab        [realms]         testsupsi.ch = {            auth_to_local = default         }        [domain_realm]         .testsupsi.ch = testsupsi.ch         testsupsi.ch = testsupsi.ch        [login]         krb4_convert = true         krb4_get_tickets = false

/etc/samba/smb.conf

code:

[global]    netbios name = vmdc1    realm = testsupsi.ch    workgroup = testsupsi    security = adssudo net ads join -u administrator  enter administrator's password:  using short domain name -- testsupsi  joined 'vmdc1' realm 'testsupsi.ch'  dns update vmdc1.dti.supsi.ch failed: error_dns_gss_error  dns update failed!    kerberos method = system keytab    client ldap sasl wrapping = sign

any ideas how solve them?

in advance!

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