On Wed, 12 Nov 2008, Paul Sobey wrote:
On Wed, 5 Nov 2008, Paul Sobey wrote:
I've just built Samba 3.2.4 on Solaris 10, with ADS support. Domain join to
a Windows 2008 domain works perfectly, having pre-created the servername in
the appropriate OU.
In my winbind logs, I see the following (domain name obfuscated):
[2008/11/05 11:28:06, 2]
libsmb/cliconnect.c:cli_session_setup_kerberos(619)
Doing kerberos session setup
[2008/11/05 11:28:06, 1] libsmb/clikrb5.c:ads_krb5_mk_req(680)
ads_krb5_mk_req: krb5_get_credentials failed for [EMAIL PROTECTED] (Cannot
resolve network address for KDC in requested realm)
[2008/11/05 11:28:06, 1]
libsmb/cliconnect.c:cli_session_setup_kerberos(626)
cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: Cannot resolve
network address for KDC in requested realm
The realm is guessed wrongly - only the short name of the domain, rather
than the fully qualified realm name, as specified in krb5.conf.
My AD full name is foo.bar.com, short name FOO. My question is - when
guessing the principal for the target DC, why does Samba guess 'FOO',
rather than 'FOO.BAR.COM'? I have a Linux machine joined to the same domain
running 3.0.28 which correctly guesses the realm.
Not sure whether this helps diagnose, but I just upgraded my Linux desktop to
Samba 3.2.4 and now get exactly the same error - winbind is refusing to
authenticate me at all. In my pam.conf I have krb5_auth set to try and make
winbind authenticate my via kerberos.
How can I troubleshoot this? It seems Samba 3.2.4 gets the Kerberos realm
wrong when authenticating against Windows 2008. I thought it was a Solaris
issue before but it seems to be OS independent. Is anybody else seeing it?
Not sure whether this helps anybody, but by patching the source of
libsmb/cliconnect.c with the following, ie hard coding the proper name of
the Kerberos realm, the error goes away.
893a894
DEBUG(3,("cli_session_setup_spnego:
dest_realm is %s\n", dest_realm));
895a897,900
DEBUG(3,("cli_session_setup_spnego:
hacking realm!\n", dest_realm));
realm = SMB_STRDUP("FOO.BAR.COM");
strupper_m(realm);
DEBUG(3,("cli_session_setup_spnego: realm
is now %s\n", realm));
896a902
DEBUG(3,("cli_session_setup_spnego:
getting realm from cache\n", realm));
To reiterate - under 3.2.4 code, 'realm' gets set to 'FOO', rather than
'FOO.BAR.COM'.
Difference in winbind logs:
Bad version:
[2008/11/12 15:49:17, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(839)
got [EMAIL PROTECTED]
[2008/11/12 15:49:17, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(880)
cli_session_setup_spnego: got a bad server principal, trying to guess
...
[2008/11/12 15:49:17, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(908)
cli_session_setup_spnego: guessed server
[EMAIL PROTECTED]
[2008/11/12 15:49:17, 2]
libsmb/cliconnect.c:cli_session_setup_kerberos(619)
Doing kerberos session setup
[2008/11/12 15:49:17, 1] libsmb/clikrb5.c:ads_krb5_mk_req(680)
ads_krb5_mk_req: krb5_get_credentials failed for [EMAIL PROTECTED]
(Cannot resolve network address for KDC in requested realm)
[2008/11/12 15:49:17, 1] libsmb/cliconnect.c:cli_session_setup_kerberos(626)
cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: Cannot
resolve network address for KDC in requested realm
[2008/11/12 15:49:17, 4] winbindd/winbindd_cm.c:cm_prepare_connection(843)
failed kerberos session setup with Cannot resolve network address for
KDC in requested realm
[2008/11/12 15:49:17, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(804)
Doing spnego session setup (blob length=124)
Hacked version:
[2008/11/12 18:23:55, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(839)
got [EMAIL PROTECTED]
[2008/11/12 18:23:55, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(880)
cli_session_setup_spnego: got a bad server principal, trying to guess
...
[2008/11/12 18:23:55, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(894)
cli_session_setup_spnego: dest_realm is FOO
[2008/11/12 18:23:55, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(897)
cli_session_setup_spnego: hacking realm!
[2008/11/12 18:23:55, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(900)
cli_session_setup_spnego: realm is now FOO.BAR.COM
[2008/11/12 18:23:55, 3]
libsmb/cliconnect.c:cli_session_setup_spnego(914)
cli_session_setup_spnego: guessed server
[EMAIL PROTECTED]
[2008/11/12 18:23:55, 2]
libsmb/cliconnect.c:cli_session_setup_kerberos(619)
Doing kerberos session setup
[2008/11/12 18:23:55, 3] libsmb/clikrb5.c:ads_cleanup_expired_creds(604)
ads_cleanup_expired_creds: Ticket in ccache[MEMORY:cliconnect]
expiration Thu, 13 Nov 2008 04:23:55 GMT
[2008/11/12 18:23:55, 3] libsmb/clikrb5.c:ads_krb5_mk_req(713)
ads_krb5_mk_req: server marked as OK to delegate to, building
forwardable TGT
[2008/11/12 18:23:55, 5]
libsmb/smb_signing.c:set_smb_signing_real_common(144)
SMB signing enabled!
Hope this is useful for somebody.
Paul
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