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[Xen-users] Named in domu listening on only some IP addresses

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "David Dyer-Bennet" <dd-b@xxxxxxxx>
  • Date: Thu, 28 Oct 2010 10:56:03 -0500
  • Delivery-date: Thu, 28 Oct 2010 08:57:28 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

I just noticed that the named instance I have running in my dom0 is only
listening on some addresses.

Netstat -ln shows the following relevant listeners:

tcp  0      0*                   LISTEN
tcp  0      0*                   LISTEN
tcp  0      0*                   LISTEN
tcp  0      0 ::1:53                :::*                        LISTEN
tcp  0      0 ::1:953               :::*                        LISTEN
udp  0      0*
udp  0      0*
udp  0      0 ::1:53                :::*

What's missing from this list is -- the primary IP for the dom0!

(Bridged network configuration, obviously!)

Which explains why from various domUs and from outside boxes I can't in
fact use the DNS server on this machine.

My DNS config seems compatible with the "caching-only" nameserver config
in the Bind admin manual (with more zones pre-loaded).  It's what's
installed by default in Centos 5.whatever I believe.  It doesn't contain
an "allow-query" clause; the doc says the default for allow-query is

Is anybody else running named in caching-only mode in a Xen dom0?  Or at
least a domU?  I suspect this is some intersection of xen and named
behavior, but there must be lots of people here running caching-only
nameservers, so somebody must have a working example they could show me?
David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/
Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/
Photos: http://dd-b.net/photography/gallery/
Dragaera: http://dragaera.info

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