[Samba] NFSv4, homes, Kerberos...

[L.P.H. van Belle]

Hai, 

I'm getting somewhere, here you go, a snap of what i have atm. 
And what works atm. Im asuming you have winbind already running. 

Obligated is A+PTR record in the DNS. 
You can turn or the rdns check in krb5.conf but i did not test that. 

# Tested on Debian Stretch - NFSv4 SERVER 
apt-get install --auto-remove nfs-kernel-server
systemctl stop nfs-*

Added in krb5.conf below the default_realm setting. 
; ignore k5login not being accessable in the user home dir.
        ignore_k5login = true

; for Windows 2008 with AES, needed by CIFS also. ( dont forget the cifs/spn )
        default_tgs_enctypes = aes128-cts-hmac-sha1-96 aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5
        default_tkt_enctypes = aes128-cts-hmac-sha1-96 aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5
        permitted_enctypes = aes128-cts-hmac-sha1-96 aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5

# Server settings for NFSv4 
sed -i 's/NEED_SVCGSSD=""/NEED_SVCGSSD="yes"/g' /etc/default/nfs-kernel-server
sed -i 's/NEED_STATD=/NEED_STATD=no/g' /etc/default/nfs-common
sed -i 's/NEED_IDMAPD=/NEED_IDMAPD=yes/g' /etc/default/nfs-common
sed -i 's/NEED_GSSD=/NEED_GSSD=yes/g' /etc/default/nfs-common

Idmap.conf
Add in [general] 
Domain = internal.domain.tld
Local-Realm = YOUR.REALM

kinit Administrator
net ads keytab add nfs/hostname1.internal.domain.tld at YOUR.REALM -k

# The NFS server.  /etc/exports cointains now. 
/srv            192.168.0.0/24(rw,sync,fsid=0,crossmnt,no_subtree_check,sec=sys:krb5:krb5i:krb5p)
/srv/backups    192.168.0.0/24(rw,sync,no_subtree_check,sec=sys:krb5:krb5i:krb5p)


# For the Clients. 
apt-get install nfs-common

kinit Administrator
# Todo on the NFSv4 client
net ads keytab add nfs/hostname2.internal.domain.tld at REALM -k

sed -i 's/NEED_STATD=/NEED_STATD=no/g' /etc/default/nfs-common
sed -i 's/NEED_IDMAPD=/NEED_IDMAPD=yes/g' /etc/default/nfs-common
sed -i 's/NEED_GSSD=/NEED_GSSD=yes/g' /etc/default/nfs-common

Test : 
mount -t nfs4 -o sec=sys,vers=4.1 hostname1.internal.domain.tld:/backups /mnt -v
mount -t nfs4 -o sec=krb5,vers=4.1 hostname1.internal.domain.tld:/backups /mnt -v
mount -t nfs4 -o sec=krb5i,vers=4.1 hostname1.internal.domain.tld:/backups /mnt -v
mount -t nfs4 -o sec=krb5p,vers=4.1 hostname1.internal.domain.tld:/backups /mnt -v

For tomorrow, in looking to add nfs4acl_xattr in the share. 
 man vfs_nfs4acl_xattr 

For now.. Im heading home... 


Greetz, 

Louis


> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens 
> Marco Gaiarin via samba
> Verzonden: dinsdag 9 oktober 2018 11:00
> Aan: samba at lists.samba.org
> Onderwerp: [Samba] NFSv4, homes, Kerberos...
> 
> 
> I was used to integrate some linux client in my samba network mounting
> homes with 'unix extensions = yes', and works as expected, at least
> with some old lubuntu derivatives. Client side i use 'pam_mount'.
> 
> Now i'm working on a ubuntu mate derivative, and i've not found a way
> to start the session properly in CIFS.
> If i create a plain local home (pam_mkhome), session start as 
> expected.
> 
> Client are in DHCP, so it is hard to use 'normal' NFSv3 mount, eg
> security by IP.
> 
> 
> I've looked around at NFSv4/Kerberos setup, but i've not found a
> tutorial, or some documentation, that seems clear (at least to me).
> 
> Also, for NFSv3 i use autofs. Better o use pam_mount instead?
> 
> 
> Breafly, someone can point me to some good documentation? Thanks.
> 
> -- 
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