Hi there I'm built samba-3.0.0-2 from the src rpm on a redhat 7.1 system. I had to make sure a few ldap and kerberos devel rpms were installed, but I managed to build and install it eventually. I added: --with-ads \ --with-krb5=/usr/kerberos \ --with-ldap to the SPEC file for the package. I followed mainly whats in here: http://www.opensource.apple.com/darwinsource/7.0b1/samba/samba/docs/htmldocs /ads.html and succeeded, briefly, in getting it all working (I think) for about 20 minutes. unfortunately I had to power off the machine as I lost control of it (don't ask), got the machine back up and running, and I now dont seem to be able to get it to use ADS authentication. I'm now a bit confused in order what things are supposed to happen. Is winbindd dependent on a working krb5.conf ? How to I determine what bit isn't working ? kinit -U user@REALM appears to challenge me for the right password, and work I appear to be able to net ads join and net ads leave ok. if I run winbindd with -i and -vv I get: got principal=pdc$@REALM Doing kerberos session setup signing_good: SMB signature check failed on seq 1! SMB Signature verification failed on incoming packet! failed kerberos session setup with NT_STATUS_OK failed anonymous session setup with NT_STATUS_OK Every 10 minutes or so. kadmin also doesn't seem to work - I get: ]# kadmin Authenticating as principal Username/user@REALM with password. kadmin: Client not found in Kerberos database while initializing kadmin interface. my machine didn't have a /var/kerberos/krb5kdc/kdc.conf file - do I create one by hand or is there a tool to help generate one ?? Can anyone help me with some diagnostic tips ? Gavin Davenport