Hello,
Sorry to send a message on an Ubuntu forum despite I'm using Debian Squeeze, but I'm totally disapointed.
I try to configure NFSv4 + Kerberos + Active Directory since several days without any success.
Here is my configuration :
- One Active Directory server under MS Server 2008 R2, which provide a DOMAIN.LOC directory
- One linux NFS Server under Debian Squeeze, named nfsserver
- One linux NFS Client under Debian Squeeze, named nfsclient
Here are all the steps I performed.
On Linux Server (nfsserver)
Package installation
- nfs-common
- nfs-kernel-server
- winbind
Package configuration
/etc/samba/smb.conf
Code:
[global]
netbios name = nfsserver
interfaces = 192.168.1.0/24 192.168.10.0/24 127.0.0.1/32
bind interfaces only = yes
workgroup = DOMAIN
realm = DOMAIN.LOC
server string = Server %h
dns proxy = no
log file = /var/log/samba/log.%m
max log size = 100
log level = 3
syslog = 0
security = ADS
local master = no
domain master = no
prefered master = no
idmap backend = tdb
idmap uid = 10000-49999
idmap gid = 10000-49999
idmap config DOMAIN : backend = rid
idmap config DOMAIN : range = 10000-49999
idmap config DOMAIN : base_rid = 0
winbind enum users = yes
winbind enum groups = yes
winbind offline logon = yes
winbind nested groups = yes
winbind refresh tickets = yes
winbind use default domain = yes
encrypt passwords = yes
password server = 192.168.1.11 192.168.1.14
client use spnego = Yes
kerberos method = secrets and keytab
dedicated keytab file = /etc/krb5.keytab
winbind refresh tickets = true
template shell = /bin/bash
template homedir = /DOMAIN/%U
name resolve order = lmhosts host
/etc/krb5.conf
Code:
[libdefaults]
ticket_lifetime = 24000
default_realm = DOMAIN.LOC
dns_lookup_realm = false
dns_lookup_kdc = false
default_tgs_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC
default_tkt_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC
preferred_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC
default_keytab_name = FILE:/etc/krb5.keytab
[realms]
DOMAIN.LOC = {
kdc = dc1.domain.loc:88
kdc = dc2.domain.loc:88
admin_server = dc1.domain.loc:749
admin_server = dc2.domain.loc:749
kpasswd_server = dc1.domain.loc:464
kpasswd_server = dc2.domain.loc:464
kpasswd_protocol = SET_CHANGE
default_domain = domain.loc
}
[domain_realm]
*.domain.loc = DOMAIN.LOC
.domain.loc = DOMAIN.LOC
domain.loc = DOMAIN.LOC
[logging]
default = FILE:/var/krb5/kdc.log
kdc = FILE:/var/krb5/kdc.log
To automatically get a kerberos ticket, Winbind is configured in /etc/pam.d/common-auth :
Code:
auth [success=3 default=ignore] pam_unix.so
auth [success=1 default=ignore] pam_winbind.so krb5_auth krb5_ccache_type=FILE cached_login use_first_pass
auth requisite pam_deny.so
auth optional pam_mount.so
auth required pam_group.so
auth required pam_permit.so
/etc/idmapd.conf
Code:
[General]
Verbosity = 3
Pipefs-Directory = /var/lib/nfs/rpc_pipefs
Domain = domain.loc
[Mapping]
Nobody-User = nobody
Nobody-Group = nogroup
/etc/default/nfs-common
Code:
NEED_STATD=yes
STATDOPTS=
NEED_IDMAPD=yes
NEED_GSSD=yes
RPCGSSDOPTS="-vvv"
/etc/default/nfs-kernel-server
Code:
RPCNFSDCOUNT=8
RPCNFSDPRIORITY=0
RPCMOUNTDOPTS="--manage-gids"
NEED_SVCGSSD=yes
RPCSVCGSSDOPTS=" -vvv "
RPCNFSDOPTS=
Join machine to the domain
Code:
> net ads join createupn=nfs/nfsserver.domain.loc -U Administrator
Using short domain name -- DOMAIN
Joined 'NFSSERVER' to realm 'domain.loc'
Check :
Code:
> wbinfo -t
checking the trust secret for domain DOMAIN via RPC calls succeeded
> id toto
uid=10000(toto) gid=10000(domain users) groups=10000(domain users)
Login with a domain user :
Code:
> klist
Ticket cache: FILE:/tmp/krb5cc_11147
Default principal: toto@DOMAIN.LOC
Valid starting Expires Service principal
06/19/13 16:13:44 06/20/13 02:13:44 krbtgt/DOMAIN.LOC@DOMAIN.LOC
renew until 06/26/13 16:13:44
06/19/13 16:13:44 06/20/13 02:13:44 NFSSERVER$@DOMAIN.LOC
renew until 06/26/13 16:13:44
06/19/13 16:13:44 06/20/13 02:13:44 NFSSERVER@DOMAIN.LOC
renew until 06/26/13 16:13:44
Login back with root and create a nfs service principal:
Code:
> net ads keytab add nfs -U Administrator
/etc/exports
Code:
/srv/nfs4 gss/krb5(rw,sync,fsid=0,crossmnt,no_subtree_check)
/srv/nfs4/share gss/krb5(rw,sync,no_subtree_check)
Restart NFS Service
Code:
> /etc/init.d/nfs-common restart
> /etc/init.d/nfs-kernel-server restart
View nfs exports
Code:
> exportfs
/srv/nfs4 gss/krb5
/srv/nfs4/share gss/krb5
On Linux Client (nfsclient)
Package installation
Package configuration
Exactly the same configuration than nfsserver except the nfs-kernel-server and exports parts which is empty.
Mounting the FS
Now I try to mount my nfs volume :
Code:
> mount -t nfs4 -o sec=krb5 nfsserver:/share /mnt -vvv
mount: fstab path: "/etc/fstab"
mount: mtab path: "/etc/mtab"
mount: lock path: "/etc/mtab~"
mount: temp path: "/etc/mtab.tmp"
mount: UID: 0
mount: eUID: 0
mount: spec: "nfsserver:/share"
mount: node: "/mnt"
mount: types: "nfs4"
mount: opts: "sec=krb5"
mount: external mount: argv[0] = "/sbin/mount.nfs4"
mount: external mount: argv[1] = "nfsserver:/share"
mount: external mount: argv[2] = "/mnt"
mount: external mount: argv[3] = "-v"
mount: external mount: argv[4] = "-o"
mount: external mount: argv[5] = "rw,sec=krb5"
mount.nfs4: timeout set for Wed Jun 19 16:31:01 2013
mount.nfs4: trying text-based options 'sec=krb5,addr=192.168.1.140,clientaddr=192.168.10.63'
mount.nfs4: mount(2): Permission denied
mount.nfs4: access denied by server while mounting nfsserver:/share
And in syslog of nfsclient I have:
Code:
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: New client: 59
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: Opened /var/lib/nfs/rpc_pipefs/nfs/clnt59/idmap
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: New client: 5a
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: handling gssd upcall (/var/lib/nfs/rpc_pipefs/nfs/clnt59)
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: handle_gssd_upcall: 'mech=krb5 uid=0 '
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: handling krb5 upcall (/var/lib/nfs/rpc_pipefs/nfs/clnt59)
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: process_krb5_upcall: service is '<null>'
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: Full hostname for 'nfsserver.domain.loc' is 'nfsserver.domain.loc'
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: Full hostname for 'nfsclient.domain.loc' is 'nfsclient.domain.loc'
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: Key table entry not found while getting keytab entry for 'root/nfsclient.domain.loc@DOMAIN.LOC'
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: Success getting keytab entry for 'nfs/nfsclient.domain.loc@DOMAIN.LOC'
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: WARNING: Client not found in Kerberos database while getting initial ticket for principal 'nfs/nfsclient.domain.loc@DOMAIN.LOC' using keytab 'WRFILE:/etc/krb5.keytab'
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: ERROR: No credentials found for connection to server nfsserver.domain.loc
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: doing error downcall
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: Stale client: 5a
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: #011-> closed /var/lib/nfs/rpc_pipefs/nfs/clnt5a/idmap
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: Stale client: 59
Jun 19 16:33:13 vm-pxe rpc.idmapd[4839]: #011-> closed /var/lib/nfs/rpc_pipefs/nfs/clnt59/idmap
Jun 19 16:33:13 vm-pxe rpc.gssd[4843]: destroying client /var/lib/nfs/rpc_pipefs/nfs/clnt59
I don't know what to do more... If you have an advice or a good idea, please help me 
Thierry.
Adv Reply
Re: Kerberized NFS
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