Web lists-archives.com

Re: [Samba] Workstations cannot update DNS




> From: Rowland penny via samba <samba@xxxxxxxxxxxxxxx>
> To: samba@xxxxxxxxxxxxxxx
> Date: 05/14/2019 02:50 PM
> Subject: Re: [Samba] Workstations cannot update DNS
> Sent by: "samba" <samba-bounces@xxxxxxxxxxxxxxx>
> 
> On 14/05/2019 21:36, Durwin via samba wrote:
> > I am trying to get DDNS working, so workstations can update their ip.
> >
> > The domain is msi.mycompany.com
> >
> > The DC server works, as well as group policies.
> >
> > I set rights to these files
> >> chgrp bind /var/lib/samba/private/
> >> chmod 750 /var/lib/samba/private/
> >> chgrp bind /var/lib/samba/private/dns.keytab
> >> chmod 640 /var/lib/samba/private/dns.keytab
> > journalctl shows this.
> > May 14 14:22:32 audit[2117]: AVC apparmor="DENIED" 
operation="file_lock"
> > profile="/usr/sbin/named" name="/var/lib/samba/private/dns.keytab"
> > pid=2117 comm="isc-worker0000" requested_mask="k" denied_mask="k"
> > fsuid=111 ouid=0
> > May 14 14:22:32 kernel: audit: type=1400 audit(1557865352.085:35):
> > apparmor="DENIED" operation="file_lock" profile="/usr/sbin/named"
> > name="/var/lib/samba/private/dns.keytab" pid=2117 
comm="isc-worker0000"
> > requested_mask="k" denied_mask="k" fsuid=111 ouid=0
> 
> It looks like you need to fix Apparmor (at least), try reading this:
> 
> 
https://wiki.samba.org/index.php/BIND9_DLZ_AppArmor_and_SELinux_Integration


selinux is not installed.
Firewall is not active.
iptables is not active.

>From that page,
BIND process has read access to the following files
/var/lib/samba/private/dns.keytab
/var/lib/samba/private/named.conf               # THIS DOES NOT EXIST

as well read-write access to the 
/var/lib/samba/private/dns/             # THIS DOES NOT EXIST
directory and it's own zone file(s). 

this is in /etc/apparmor.d/usr.sbin.named.
  # /etc/bind should be read-only for bind
  # /var/lib/bind is for dynamically updated zone (and journal) files.
  # /var/cache/bind is for slave/stub data, since we're not the origin of 
it.
  # See /usr/share/doc/bind9/README.Debian.gz
  /etc/bind/** r,
  /var/lib/bind/** rw,
  /var/lib/bind/ rw,
  /var/cache/bind/** lrw,
  /var/cache/bind/ rw,

  # gssapi
  /etc/krb5.keytab kr,
  /etc/bind/krb5.keytab kr,
  /var/lib/samba/lib/** rm,
  /var/lib/samba/private/dns.keytab r,
  /var/lib/samba/private/named.conf r,
  /var/lib/samba/private/dns/** rwk,            # THIS DOES NOT EXIST
  /var/lib/samba/etc/smb.conf r,

I rebooted just to be sure.  However, I still get client update denied.


This is in /etc/bind/

drwxr-sr-x  2 root bind 4096 May 15 10:38 ./
drwxr-xr-x 99 root root 4096 May  3 11:13 ../
-rw-r--r--  1 root root 2761 Apr 24 04:04 bind.keys
-rw-r--r--  1 root root  237 Oct 10  2018 db.0
-rw-r--r--  1 root root  271 Oct 10  2018 db.127
-rw-r--r--  1 root bind  615 May 10 11:28 db.172.23.93
-rw-r--r--  1 root root  237 Oct 10  2018 db.255
-rw-r--r--  1 root root  353 Oct 10  2018 db.empty
-rw-r--r--  1 root root  270 Oct 10  2018 db.local
-rw-r--r--  1 root root 3171 Oct 10  2018 db.root
-rw-r--r--  1 root bind  499 May 10 11:12 named.conf
-rw-r--r--  1 root bind  662 May 14 11:42 named.conf.default-zones
-rw-r--r--  1 root bind  258 Apr 29 11:34 named.conf.local
-rw-r--r--  1 root bind  193 May 14 11:44 named.conf.msi
-rw-r--r--  1 root bind 1109 May 14 09:22 named.conf.options
-rw-r-----  1 bind bind   77 Apr 29 11:22 rndc.key
-rw-r--r--  1 root root 1317 Oct 10  2018 zones.rfc1918


Thank you,

Durwin


> Rowland
> 
> 
> -- 
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba



This email message and any attachments are for the sole use of the 
intended recipient(s) and may contain proprietary and/or confidential 
information which may be privileged or otherwise protected from 
disclosure. Any unauthorized review, use, disclosure or distribution is 
prohibited. If you are not the intended recipient(s), please contact the 
sender by reply email and destroy the original message and any copies of 
the message as well as any attachments to the original message.
-- 
To unsubscribe from this list go to the following URL and read the
instructions:  https://lists.samba.org/mailman/options/samba