Your keytab has
DOMAIN.ORG as the realm.
The same happened to the keytab file. Here the right one, corresponding to the log file.
Sorry.
Keytab name: FILE:/etc/krb5.keytab
KVNO Timestamp Principal
---- ------------------- ------------------------------------------------------
2 05/19/2014 10:36:55 host/skywalker.nat.domain.org(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/skywalker.nat.domain.org(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/skywalker.nat.domain.org(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/skywalker.nat.domain.org(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/skywalker.nat.domain.org(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/SKYWALKER(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/SKYWALKER(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/SKYWALKER(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/SKYWALKER(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 host/SKYWALKER(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 SKYWALKER$(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 SKYWALKER$(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 SKYWALKER$(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 SKYWALKER$(a)NAT.DOMAIN.ORG
2 05/19/2014 10:36:55 SKYWALKER$(a)NAT.DOMAIN.ORG
Best,
Longina