[Samba] URGENT - production server stops working (v3.6)

[Andreas Grabner]

Hello,

i need some help. A samba3 (3.6.9-151.el6_4.1) ADS member (WIN 2008 AD 
Master) Server did his work for years. Since hours some Clients can not 
connect to the name (\\fileserver)
connecting to \\192... sometimes work.

Log say:
2013/10/09 09:54:27.735101,  3] smbd/sesssetup.c:660(reply_spnego_negotiate)
   reply_spnego_negotiate: Got secblob of size 1638
[2013/10/09 09:54:27.735423,  3] 
libads/kerberos_verify.c:435(ads_secrets_verify_ticket)
   libads/kerberos_verify.c:435: enc type [23] failed to decrypt with 
error Decrypt integrity check failed
[2013/10/09 09:54:27.757589,  3] 
libads/kerberos_verify.c:638(ads_verify_ticket)
   libads/kerberos_verify.c:638: krb5_rd_req with auth failed (Bad 
encryption type)
[2013/10/09 09:54:27.757792,  1] smbd/sesssetup.c:342(reply_spnego_kerberos)
   Failed to verify incoming ticket with error NT_STATUS_LOGON_FAILURE!


Any hints are wellcome?

Andreas

-- 
Ing. Andreas Grabner
+43 676 840 775 101
andreas at vianova.cc
  
Via Nova Mediendesign GMBH
Augasse 24
A- 7400 oberwart
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www.vianova.cc