[Samba] Workstations cannot update DNS

durwin at mgtsciences.com
2019-05-15T19:11:59Z

> >
https://wiki.samba.org/index.php/BIND9_DLZ_AppArmor_and_SELinux_Integration

> >
> > selinux is not installed.
> > Firewall is not active.
> > iptables is not active.
> The problem appears to have something to do with Apparmor.
> >
> > 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
>
> OK, but I do not remember you saying which version of Samba you are
> using, later versions now use the path '/var/lib/samba/bind-dns'
instead

> of '/var/lib/samba/private'

I am using Bind9 on Ubuntu 18.04
Ok, I verified permissions on /var/lib/samba/bind-dns.

>
> >
> > 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

I changed above line to.
      /var/lib/samba/bind-dns/** rwk,
Or should it be?
      /var/lib/samba/bind-dns/dns/** rwk,

> >   /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
> Is the above your reverse zone ?

The only thing I added or modified in this entire directory is
named.conf.msi and added line,
include "/etc/bind/named.conf.msi";
to named.conf
The rest you see here was not added by me.

> >
> > -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
>
> And is the above your forward zone ?
>
> If it is yes to both of the last questions, then you need to delete
> them, you cannot use flatfiles with BIND9_DLZ

Do I delete only the 'db.*' files?  Are the 'named.conf*' files
in this
location not used?  If I do delete the named.* files, what do I edit
to add a slave domain for mycompany.com (DC domain is msi.mycompany.com)?
The DC is master of msi.mycompany.com, another server is master of
mycompany.com.

Thank you,

Durwin

>
> >
> > -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
> >
> Rowland
>
>
>
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