Unusual permissions on /var/named/etc/namedb/master?

Josh Tolbert hemi at puresimplicity.net
Tue Nov 8 21:27:47 GMT 2005

On Tue, Nov 08, 2005 at 12:03:23PM -0500, Lowell Gilbert wrote:
> Josh Tolbert <hemi at puresimplicity.net> writes:
> > Hello,
> > 
> > I'm running DHCP + dynamic DNS here on my home LAN and I've noticed a problem
> > that needs a manual fix every time the DNS machine gets rebooted. It doesn't
> > happen very often, but it does happen. :)
> > 
> > My firewall/gateway machine runs FreeBSD-5.4-RELEASE of some patchlevel. It
> > uses ISC DHCPD from ports to update my DNS server, another FreeBSD machine
> > (now running 6.0-RELEASE) with new entries when machines register with the
> > DHCP server. The problem arises because by default named runs -u bind, however
> > /var/named/etc/namedb/master is owned by root. I believe this is caused by
> > /etc/mtree/BIND.chroot.dist, since I'm running bind chrooted (the default
> > setup). When the DNS machine reboots, I have to manually chown
> > /var/named/etc/namedb/master (or /etc/namedb/master) to bind before updates
> > will continue, otherwise I see errors such as
> > 
> > named[297]: dumping master file: master/tmp-QQ2UU6pWaZ: open: permission denied
> > 
> > Is there any good workaround for this issue? I'd like to keep bind running as
> > the bind user as well as keep bind chrooted if possible. I know I could edit
> > the mtree file on my machine, but that seems somewhat kludgy to me.
> > 
> > Thanks for any help/advice you can give me,
> Normally mtree is only automatically run by installworld.  
> Is that what causes the permissions to be reverted?
> If so, then change the mtree file (and keep the modifications over
> time when you run mergemaster).
> If not, then figure out what *is* changing the permissions.

Hi Lowell,

>From what I'm seeing in the /etc/rc.d/named script, mtree gets ran with the
BIND.chroot.dist mtree file every time bind starts. I guess I'll have to
maintain my own changes to that file for the time being.

Josh Tolbert
hemi at puresimplicity.net  ||  http://www.puresimplicity.net/~hemi/

If your sysadmin's not being fascist, you're paying him too much.
   --Sam Greenfield

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