On 23/12/2022 16:02, Stefan Kania via samba wrote:> Hi all,
>
> I try to get pam-mount working with sec=krb5 I've got the following
config:
> ---------------------
> <volume
> ??????? fstype="cifs"
> ??????? server="fs-01.example.net"
> ??????? path="users/%(DOMAIN_USER)"
> ??????? mountpoint="/home/EXAMPLE/%(DOMAIN_USER)"
> ??????? sgrp="domain users"
> ???????
options="sec=krb5,cruid=%(USERID),workgroup=EXAMPLE,vers=3.1.1" />
>
> <volume
> ??????? fstype="cifs"
> ??????? server="fs-01.example.net"
> ??????? path="abteilungen"
> ??????? mountpoint="/abteilungen"
> ??????? sgrp="domain users"
> ???????
options="sec=krb5,cruid=%(USERID),workgroup=EXAMPLE,vers=3.1.1" />
> ---------------------
>
> When I connect with a user I see:
> ---------------------
> Dec 23 16:23:46 client-02 kernel: [?? 81.158008] CIFS: Attempting to
> mount \\fs-01.example.net\users
> Dec 23 16:23:46 client-02 kernel: [?? 81.253128] CIFS: VFS: Verify user
> has a krb5 ticket and keyutils is installed
> Dec 23 16:23:46 client-02 kernel: [?? 81.253134] CIFS: VFS:
> \\fs-01.example.net Send error in SessSetup = -126
> Dec 23 16:23:46 client-02 kernel: [?? 81.253154] CIFS: VFS: cifs_mount
> failed w/return code = -126
If I remember correctly, '-126' basically means 'help, I cannot find
the
kerberos ticket'.
>
> ---------------------
>
> When I switch to "sec=ntlmssp" pam-mount is working.
>
> I then tried to get a ticket and access the share via smbclient:
> -----------------
> ktom at client-02:~$ kinit ktom
> ktom at EXAMPLE.NET's Password:
> ktom at client-02:~$ klist
> Credentials cache: FILE:/tmp/krb5cc_1001107_dUP4GZ
> ??????? Principal: ktom at EXAMPLE.NET
>
> ktom at client-02:~$ smbclient //fs-01/abteilungen
> Enter ktom at EXAMPLE.NET's password:
> Try "help" to get a list of possible commands.
> smb: \>
That isn't using kerberos, try adding '--use-kerberos=required'
>
> ktom at client-02:~$ klist
> Credentials cache: FILE:/tmp/krb5cc_1001107_dUP4GZ
> ??????? Principal: ktom at EXAMPLE.NET
>
> ? Issued??????????????? Expires?????????????? Principal
> Dec 23 16:44:49 2022? Dec 24 02:44:49 2022? krbtgt/EXAMPLE.NET at
EXAMPLE.NET
> Dec 23 16:46:09 2022? Dec 24 02:44:49 2022? cifs/fs-01 at EXAMPLE.NET
> -----------------
>
> Here is my krb5.conf:
> ---------------
> [libdefaults]
> ??????? default_realm = EXAMPLE.NET
> ??????? dns_lookup_realm = false
> ??????? dns_lookup_kdc = true
> ---------------
>
> And smb.conf
> ---------------
> [global]
> ??????? workgroup = example
> ??????? realm = EXAMPLE.NET
> ??????? security = ADS
> ??????? winbind refresh tickets = yes
> ??????? winbind use default domain = yes
> ??????? template shell = /bin/bash
> ??????? idmap config * : range = 100000 - 199999
> ??????? idmap config EXAMPLE : backend = rid
> ??????? idmap config EXAMPLE : range = 1000000 - 1999999
> ---------------
>
> Any idea?
>
It could be that pam_mount is looking for the kerberos ticket
'/tmp/krb5cc_1001107' and as you can see, it is actually
'/tmp/krb5cc_1001107_dUP4GZ'
Rowland