Hi,
I'm trying to set up NFSv4 on two boxes (centos 5.5) and have it
authenticate against our Windows 2008R2 AD server acting as the KDC.
(samba/winbind is running ok with "idmap config MYCOMPANY: backend = rid"
so we have identical ids across the servers.)
I can mount my test directory fine via NFSv4 *without* the sec=krb5 option.
However, once I put the sec=krb5 option in, then I get a mount error:
"mount.nfs4: Permission denied" and rpc.gssd reports: "Failed to obtain
machine credentials for connection to server"
The computers have an AD computer account and for the service-principal, I
created an AD user account "nfsHostname" and mapped the UPN e.g. NFS/
hostname.mycompany.tv@xxxxxxxxxxxx to it using ktpass.
This is the closest post similar to my issue I could find:
http://lists.centos.org/pipermail/centos/2010-July/096378.html However,
I'm trying not to run the createupn command via smbutils.
Side note:
Eventually we will also be using a HDS nas which doesn't provide us with
samba net utils (e.g. net ads join createupn) only their proprietary
webadmin/cli. When that nas joined our AD domain, it created a computer
account with SPNs of HOST/HOSTNAME, HOST/hostname.MYCOMPANY.TV and a UPN of
HOST/hostname.mycompany.tv@xxxxxxxxxxxx And the HDS nas only wants
encryption type: des-cbc-crc:normal. This is why on my test nfs server
(nas002), I'm trying to use the same limited commands as I would if I were
using the HDS nas.
Any suggestions where to look next or get more verbose info from
kerberos/KDC or the nfs server? (nothing shows up in either syslog --
plus, I'm not all that familiar with kerberos.)
thanks in advance!
JA.
info:
10.100.1.11 KDC server (Windows 2008 R2, AD)
10.100.1.35 bk001 (nfsv4 client, kernel 2.6.18-194.32.1.el5)
10.100.1.82 nas002 (nfsv4 server, kernel 2.6.18-194.32.1.el5)
10.100.1.99 monitoring server
intsalled on both nfsv4 client and server:
nfs-utils.x86_64 1.0.9-60.el5
nfs-utils-lib.x86_64 1.0.8-7.9.el5
nfs4-acl-tools.x86_64 0.3.3-3.el5
krb5-workstation.x86_64 1.6.1-70.el5
samba (nas002) 3.3.8-0.52.el5_5.2
samba (bk001) 3.5.10-0.107.el5
[root@bk001 ~]# net ads testjoin
Join is OK
[root@bk001 ~]# kinit administrator@xxxxxxxxxxxx
Password for administrator@xxxxxxxxxxxx:
[root@bk001 ~]# kinit nfs/nas002.mycompany.tv@xxxxxxxxxxxx
Password for nfs/nas002.mycompany.tv@xxxxxxxxxxxx:
[root@bk001 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: nfs/nas002.mycompany.tv@xxxxxxxxxxxx
Valid starting Expires Service principal
04/13/12 16:08:51 04/14/12 02:08:51 krbtgt/MYCOMPANY.TV@xxxxxxxxxxxx
renew until 04/16/12 16:08:51
Kerberos 4 ticket cache: /tmp/tkt0
klist: You have no tickets cached
[root@bk001 ~]# showmount -e nas002.mycompany.tv
Export list for nas002.mycompany.tv:
/array gss/krb5,*
[root@bk001 ~]# mount -v -t nfs4 -o proto=tcp,sec=krb5 nas002.mycompany.tv:/
/mnt/nfs4test
Warning: rpc.idmapd appears not to be running.
All uids will be mapped to the nobody uid.
Warning: rpc.gssd appears not to be running.
mount: pinging: prog 100003 vers 4 prot tcp port 2049
mount.nfs4: Permission denied
[root@bk001 ~]# ps -elf | egrep 'gss|idmap'
1 S root 2498 1 0 75 0 - 8016 - Apr12 ? 00:00:00
rpc.gssd -rrrvvvv
1 S root 4575 1 0 76 0 - 14833 - Apr12 ? 00:00:00
rpc.idmapd -vvv
[root@bk001 ~]# tail /var/log/messages
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: New client: 16
Apr 13 16:09:09 bk001 rpc.gssd[2498]: handling krb5 upcall
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: New client: 17
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: Opened
/var/lib/nfs/rpc_pipefs/nfs/clnt16/idmap
Apr 13 16:09:09 bk001 rpc.gssd[2498]: Using keytab file '/etc/krb5.keytab'
Apr 13 16:09:09 bk001 rpc.gssd[2498]: WARNING: Failed to obtain machine
credentials for connection to server nas002.mycompany.tv
Apr 13 16:09:09 bk001 rpc.gssd[2498]: doing error downcall
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: Stale client: 16
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: -> closed
/var/lib/nfs/rpc_pipefs/nfs/clnt16/idmap
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: Stale client: 17
Apr 13 16:09:09 bk001 rpc.idmapd[4575]: -> closed
/var/lib/nfs/rpc_pipefs/nfs/clnt17/idmap
Apr 13 16:09:09 bk001 rpc.gssd[2498]: destroying client clnt17
Apr 13 16:09:09 bk001 rpc.gssd[2498]: destroying client clnt16
tshark capture of commands I performed (above):
[root@bk001 ~]# cat /var/tmp/tshark_041312-1608.out
366 9.948504 10.100.1.35 -> 10.100.1.11 TCP 42564 > kerberos [SYN]
Seq=0 Win=5840 Len=0 MSS=1460 TSV=86719599 TSER=0 WS=7
367 9.948813 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42564 [SYN, ACK]
Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 TSV=396813568 TSER=86719599
368 9.948824 10.100.1.35 -> 10.100.1.11 TCP 42564 > kerberos [ACK]
Seq=1 Ack=1 Win=5840 Len=0 TSV=86719599 TSER=396813568
369 9.948849 10.100.1.35 -> 10.100.1.11 KRB5 AS-REQ
370 9.949976 10.100.1.11 -> 10.100.1.35 KRB5 KRB Error:
KRB5KDC_ERR_PREAUTH_REQUIRED
371 9.949982 10.100.1.35 -> 10.100.1.11 TCP 42564 > kerberos [ACK]
Seq=181 Ack=154 Win=6432 Len=0 TSV=86719600 TSER=396813568
372 9.950031 10.100.1.35 -> 10.100.1.11 TCP 42564 > kerberos [FIN, ACK]
Seq=181 Ack=154 Win=6432 Len=0 TSV=86719600 TSER=396813568
373 9.950288 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42564 [ACK]
Seq=154 Ack=182 Win=65160 Len=0 TSV=396813568 TSER=86719600
374 9.950297 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42564 [RST, ACK]
Seq=154 Ack=182 Win=0 Len=0
444 11.840921 10.100.1.35 -> 10.100.1.11 TCP 42565 > kerberos [SYN]
Seq=0 Win=5840 Len=0 MSS=1460 TSV=86721491 TSER=0 WS=7
446 11.841178 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42565 [SYN, ACK]
Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 TSV=396813757 TSER=86721491
447 11.841185 10.100.1.35 -> 10.100.1.11 TCP 42565 > kerberos [ACK]
Seq=1 Ack=1 Win=5840 Len=0 TSV=86721491 TSER=396813757
448 11.841206 10.100.1.35 -> 10.100.1.11 KRB5 AS-REQ
449 11.842812 10.100.1.11 -> 10.100.1.35 TCP [TCP segment of a
reassembled PDU]
450 11.842817 10.100.1.35 -> 10.100.1.11 TCP 42565 > kerberos [ACK]
Seq=259 Ack=1449 Win=8688 Len=0 TSV=86721493 TSER=396813757
451 11.842819 10.100.1.11 -> 10.100.1.35 KRB5 AS-REP
452 11.842822 10.100.1.35 -> 10.100.1.11 TCP 42565 > kerberos [ACK]
Seq=259 Ack=1518 Win=8688 Len=0 TSV=86721493 TSER=396813757
453 11.842852 10.100.1.35 -> 10.100.1.11 TCP 42565 > kerberos [FIN, ACK]
Seq=259 Ack=1518 Win=8688 Len=0 TSV=86721493 TSER=396813757
454 11.843043 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42565 [ACK]
Seq=1518 Ack=260 Win=65160 Len=0 TSV=396813758 TSER=86721493
455 11.843050 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42565 [RST, ACK]
Seq=1518 Ack=260 Win=0 Len=0
827 21.821693 10.100.1.35 -> 10.100.1.11 TCP 42566 > kerberos [SYN]
Seq=0 Win=5840 Len=0 MSS=1460 TSV=86731472 TSER=0 WS=7
828 21.821920 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42566 [SYN, ACK]
Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 TSV=396814755 TSER=86731472
829 21.821930 10.100.1.35 -> 10.100.1.11 TCP 42566 > kerberos [ACK]
Seq=1 Ack=1 Win=5840 Len=0 TSV=86731472 TSER=396814755
830 21.821958 10.100.1.35 -> 10.100.1.11 KRB5 AS-REQ
831 21.822968 10.100.1.11 -> 10.100.1.35 KRB5 AS-REP
832 21.822974 10.100.1.35 -> 10.100.1.11 TCP 42566 > kerberos [ACK]
Seq=191 Ack=618 Win=6787 Len=0 TSV=86731473 TSER=396814756
833 21.823003 10.100.1.35 -> 10.100.1.11 TCP 42566 > kerberos [FIN, ACK]
Seq=191 Ack=618 Win=6787 Len=0 TSV=86731473 TSER=396814756
835 21.823278 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42566 [ACK]
Seq=618 Ack=192 Win=65160 Len=0 TSV=396814756 TSER=86731473
836 21.823287 10.100.1.11 -> 10.100.1.35 TCP kerberos > 42566 [RST, ACK]
Seq=618 Ack=192 Win=0 Len=0
1472 39.980317 10.100.1.35 -> 10.100.1.82 TCP 40520 > nfs [SYN] Seq=0
Win=5840 Len=0 MSS=1460 TSV=86749629 TSER=0 WS=7
1473 39.980491 10.100.1.82 -> 10.100.1.35 TCP nfs > 40520 [SYN, ACK]
Seq=0 Ack=1 Win=5792 Len=0 MSS=1460 TSV=3789493491 TSER=86749629 WS=7
1474 39.980498 10.100.1.35 -> 10.100.1.82 TCP 40520 > nfs [ACK] Seq=1
Ack=1 Win=5888 Len=0 TSV=86749631 TSER=3789493491
1475 39.980533 10.100.1.35 -> 10.100.1.82 NFS V4 NULL Call
1476 39.980701 10.100.1.82 -> 10.100.1.35 TCP nfs > 40520 [ACK] Seq=1
Ack=45 Win=5888 Len=0 TSV=3789493492 TSER=86749631
1477 39.980705 10.100.1.82 -> 10.100.1.35 NFS V4 NULL Reply (Call In
1475)
1478 39.980707 10.100.1.35 -> 10.100.1.82 TCP 40520 > nfs [ACK] Seq=45
Ack=29 Win=5888 Len=0 TSV=86749631 TSER=3789493492
1479 39.980733 10.100.1.35 -> 10.100.1.82 TCP 40520 > nfs [FIN, ACK]
Seq=45 Ack=29 Win=5888 Len=0 TSV=86749631 TSER=3789493492
1480 39.980896 10.100.1.82 -> 10.100.1.35 TCP nfs > 40520 [FIN, ACK]
Seq=29 Ack=46 Win=5888 Len=0 TSV=3789493492 TSER=86749631
1481 39.980901 10.100.1.35 -> 10.100.1.82 TCP 40520 > nfs [ACK] Seq=46
Ack=30 Win=5888 Len=0 TSV=86749631 TSER=3789493492
1482 40.001039 10.100.1.35 -> 10.100.1.82 TCP connendp > nfs [SYN] Seq=0
Win=5840 Len=0 MSS=1460 TSV=86749651 TSER=0 WS=7
1483 40.001210 10.100.1.82 -> 10.100.1.35 TCP nfs > connendp [SYN, ACK]
Seq=0 Ack=1 Win=5792 Len=0 MSS=1460 TSV=3789493512 TSER=86749651 WS=7
1484 40.001221 10.100.1.35 -> 10.100.1.82 TCP connendp > nfs [ACK] Seq=1
Ack=1 Win=5888 Len=0 TSV=86749651 TSER=3789493512
1485 40.001244 10.100.1.35 -> 10.100.1.82 NFS V4 NULL Call
1486 40.001409 10.100.1.82 -> 10.100.1.35 TCP nfs > connendp [ACK] Seq=1
Ack=45 Win=5888 Len=0 TSV=3789493512 TSER=86749651
1487 40.001414 10.100.1.82 -> 10.100.1.35 NFS V4 NULL Reply (Call In
1485)
1488 40.001418 10.100.1.35 -> 10.100.1.82 TCP connendp > nfs [ACK]
Seq=45 Ack=29 Win=5888 Len=0 TSV=86749652 TSER=3789493512
1489 40.002363 10.100.1.35 -> 10.100.1.82 TCP connendp > nfs [FIN, ACK]
Seq=45 Ack=29 Win=5888 Len=0 TSV=86749653 TSER=3789493512
1490 40.002526 10.100.1.82 -> 10.100.1.35 TCP nfs > connendp [FIN, ACK]
Seq=29 Ack=46 Win=5888 Len=0 TSV=3789493513 TSER=86749653
1491 40.002532 10.100.1.35 -> 10.100.1.82 TCP connendp > nfs [ACK]
Seq=46 Ack=30 Win=5888 Len=0 TSV=86749653 TSER=3789493513
1493 40.002880 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: New client: 16\n
1497 40.003611 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.ERR:
rpc.gssd[2498]: handling krb5 upcall \n
1498 40.004069 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: New client: 17\n
1499 40.004489 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: Opened /var/lib/nfs/rpc_pipefs/nfs/clnt16/idmap\n
1500 40.004949 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.ERR:
rpc.gssd[2498]: Using keytab file '/etc/krb5.keytab' \n
1501 40.005369 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.ERR:
rpc.gssd[2498]: WARNING: Failed to obtain machine credentials for
connection to server nas002.mycompany.tv \n
1502 40.005829 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.ERR:
rpc.gssd[2498]: doing error downcall \n
1503 40.012862 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: Stale client: 16\n
1504 40.013326 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: \t-> closed /var/lib/nfs/rpc_pipefs/nfs/clnt16/idmap\n
1505 40.013740 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: Stale client: 17\n
1506 40.014157 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.WARNING:
rpc.idmapd[4575]: \t-> closed /var/lib/nfs/rpc_pipefs/nfs/clnt17/idmap\n
1507 40.014621 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.ERR:
rpc.gssd[2498]: destroying client clnt17 \n
1508 40.015082 10.100.1.35 -> 10.100.1.99 Syslog DAEMON.ERR:
rpc.gssd[2498]: destroying client clnt16 \n
[root@bk001 ~]#
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