I'm having trouble logging in via the gui console to an Ubuntu 16 Desktop host that is affiliated with a FreeIPA server, which in turn is affiliated with an Active Directory server.
When I try to log in with debugging turned up on the SSSD I see an underlying error in the krb5_child log file: Cannot find KDC for realm " EXAMPLE.COM" while getting credentials for host/ myhost.example....@example.com Following an example from the freeipa-users mailing list, I am just working with kinit and kvno to identify the underlying problem. I get the same error, which I suppose is good. But I don't know how to resolve it from here. The transcript is below. On the first try at kvno, I get the same error. On the second try, it works. Any idea why? I suspect the failure on the first try is the real problem with authentication from the console. Any hints what to try next? Thanks ----- /etc/krb5.conf ----- #File modified by ipa-client-install includedir */var/lib/sss/pubconf/krb5.include.d/* [libdefaults] default_realm = EXAMPLE.COM dns_lookup_realm = true dns_lookup_kdc = true rdns = false ticket_lifetime = 24h forwardable = true udp_preference_limit = 0 default_ccache_name = KEYRING:persistent:%{uid} [realms] EXAMPLE.COM = { pkinit_anchors = FILE:/etc/ipa/ca.crt } [domain_realm] .example.com = EXAMPLE.COM example.com = EXAMPLE.COM ----- Transcript ----- $ kdestroy -A $ kinit adu...@ad.example.com Password for adu...@ad.example.com: $ klist Ticket cache: KEYRING:persistent:1000:1000 Default principal: adu...@ad.example.com Valid starting Expires Service principal 08/14/2017 09:59:22 08/14/2017 19:59:22 krbtgt/ad.example....@ad.example.com renew until 08/15/2017 09:59:17 $ KRB5_TRACE=/dev/stdout kvno host/myhost.example....@example.com [1994] 1502719211.714019: Getting credentials adu...@ad.example.com -> host/myhost.example....@example.com using ccache KEYRING:persistent:1000:1000 [1994] 1502719211.714237: Retrieving adu...@ad.example.com -> host/myhost.example....@example.com from KEYRING:persistent:1000:1000 with result: -1765328243/Matching credential not found [1994] 1502719211.714318: Retrieving adu...@ad.example.com -> krbtgt/example....@example.com from KEYRING:persistent:1000:1000 with result: -1765328243/Matching credential not found [1994] 1502719211.714376: Retrieving adu...@ad.example.com -> krbtgt/ad.example....@ad.example.com from KEYRING:persistent:1000:1000 with result: 0/Success [1994] 1502719211.714395: Starting with TGT for client realm: adu...@ad.example.com -> krbtgt/ad.example....@ad.example.com [1994] 1502719211.714439: Retrieving adu...@ad.example.com -> krbtgt/example....@example.com from KEYRING:persistent:1000:1000 with result: -1765328243/Matching credential not found [1994] 1502719211.714456: Requesting TGT krbtgt/example....@ad.example.com using TGT krbtgt/ad.example....@ad.example.com [1994] 1502719211.714486: Generated subkey for TGS request: aes256-cts/020C [1994] 1502719211.714525: etypes requested in TGS request: aes256-cts, aes128-cts, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts [1994] 1502719211.714605: Encoding request body and padata into FAST request [1994] 1502719211.714662: Sending request (1686 bytes) to AD.EXAMPLE.COM [1994] 1502719211.717532: Resolving hostname ad-host.ad.example.com. [1994] 1502719211.719053: Sending initial UDP request to dgram 192.168.1.2:88 [1994] 1502719211.742171: Received answer (309 bytes) from dgram 192.168.1.2:88 [1994] 1502719211.743066: Response was not from master KDC [1994] 1502719211.743082: Decoding FAST response [1994] 1502719211.743109: Request or response is too big for UDP; retrying with TCP [1994] 1502719211.743113: Sending request (1686 bytes) to AD.EXAMPLE.COM (tcp only) [1994] 1502719211.743971: Resolving hostname ad-host.ad.example.com. [1994] 1502719211.744908: Initiating TCP connection to stream 192.168.1.2:88 [1994] 1502719211.764062: Sending TCP request to stream 192.168.1.2:88 [1994] 1502719211.805666: Received answer (1643 bytes) from stream 192.168.1.2:88 [1994] 1502719211.805678: Terminating TCP connection to stream 192.168.1.2:88 [1994] 1502719211.806709: Response was not from master KDC [1994] 1502719211.806735: Decoding FAST response [1994] 1502719211.806789: FAST reply key: aes256-cts/820C [1994] 1502719211.806808: TGS reply is for adu...@ad.example.com -> krbtgt/example....@ad.example.com with session key aes256-cts/B56C [1994] 1502719211.806822: TGS request result: 0/Success [1994] 1502719211.806826: Storing adu...@ad.example.com -> krbtgt/example....@ad.example.com in KEYRING:persistent:1000:1000 [1994] 1502719211.806912: Received TGT for service realm: krbtgt/example....@ad.example.com [1994] 1502719211.806915: Requesting tickets for host/myhost.example....@example.com, referrals on [1994] 1502719211.806924: Generated subkey for TGS request: aes256-cts/D365 [1994] 1502719211.806940: etypes requested in TGS request: aes256-cts, aes128-cts, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts [1994] 1502719211.806968: Encoding request body and padata into FAST request [1994] 1502719211.806994: Sending request (1676 bytes) to EXAMPLE.COM (tcp only) kvno: Cannot find KDC for realm "EXAMPLE.COM" while getting credentials for host/myhost.example....@example.com $ KRB5_TRACE=/dev/stdout kvno host/myhost.example....@example.com [1995] 1502719219.601419: Getting credentials adu...@ad.example.com -> host/myhost.example....@example.com using ccache KEYRING:persistent:1000:1000 [1995] 1502719219.601516: Retrieving adu...@ad.example.com -> host/myhost.example....@example.com from KEYRING:persistent:1000:1000 with result: -1765328243/Matching credential not found [1995] 1502719219.601556: Retrieving adu...@ad.example.com -> krbtgt/example....@example.com from KEYRING:persistent:1000:1000 with result: 0/Success [1995] 1502719219.601559: Found cached TGT for service realm: adu...@ad.example.com -> krbtgt/example....@ad.example.com [1995] 1502719219.601561: Requesting tickets for host/myhost.example....@example.com, referrals on [1995] 1502719219.601573: Generated subkey for TGS request: aes256-cts/5EC1 [1995] 1502719219.601592: etypes requested in TGS request: aes256-cts, aes128-cts, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts [1995] 1502719219.601639: Encoding request body and padata into FAST request [1995] 1502719219.601666: Sending request (1676 bytes) to EXAMPLE.COM [1995] 1502719219.603587: Resolving hostname idsg-test16.example.com. [1995] 1502719219.604856: Sending initial UDP request to dgram 192.168.1.1:88 [1995] 1502719219.621855: Received answer (1680 bytes) from dgram 192.168.1.1:88 [1995] 1502719219.622767: Response was not from master KDC [1995] 1502719219.622783: Decoding FAST response [1995] 1502719219.622834: FAST reply key: aes256-cts/14A3 [1995] 1502719219.622852: TGS reply is for adu...@ad.example.com -> host/myhost.example....@example.com with session key aes256-cts/B41C [1995] 1502719219.622866: TGS request result: 0/Success [1995] 1502719219.622868: Received creds for desired service host/myhost.example....@example.com [1995] 1502719219.622871: Storing adu...@ad.example.com -> host/myhost.example....@example.com in KEYRING:persistent:1000:1000host/myhost.example....@example.com: kvno = 7
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