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@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/skywalker.nat.domain.org@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/skywalker.nat.domain.org@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/skywalker.nat.domain.org@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/skywalker.nat.domain.org@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/SKYWALKER@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/SKYWALKER@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/SKYWALKER@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/SKYWALKER@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 host/SKYWALKER@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 SKYWALKER$@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 SKYWALKER$@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 SKYWALKER$@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 SKYWALKER$@NAT.DOMAIN.ORG 2 05/19/2014 10:36:55 SKYWALKER$@NAT.DOMAIN.ORG
Best, Longina