Resolving domain

[Mark Andrews]

> But why after restarted my named I can resolve the name?
> 
> Rasheed 

	Because it depends on the query order.  Sometimes the server
	will see the glue record and sometimes it will already have
	the NS records for the zone and see the NXDOMAIN response.

	This sort of problem would be reduced if registries /
	registrars validated glue initially and periodically
	revalidated glue.  Similarly with NS RRset.  At the moment
	most registries / registrars do no checking which leads to
	broken delegations.
	
	Mark

> -----Original Message-----
> From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On Behalf
> Of Mark Andrews
> Sent: Wednesday, September 13, 2006 11:56 AM
> To: Rasheed Darras
> Cc: bind-users at isc.org
> Subject: Re: Resolving domain
> 
> 
> > Hi,
> > 
> > I have problem resolving some domains like (aleshq.net)... When I 
> > traced the problem I found that my DNS couldn't resolve that domain ns
> servers.
> 
> 	No.  It resolved the name and got told that the name doesn't
> 	exist.
> 
> > No IP I got If I "dig ns1.sbaar.com a".
> > But if I made "dig ns1.sbaar.com a +trace" I got the IP. Now If 
> > completely stop my named server and start it again I can resolve that 
> > domain and reach it's ns servers. What could be the problem?
> 
> 	You are seeing glue records from the COM zone.
> 
> 	You need to contact the administators for sbaar.com and get
> 	them to fix the problem.
> 
> 	Mark
>  
> > ; <<>> DiG 9.3.0 <<>> ns1.sbaar.com a
> > ;; global options:  printcmd
> > ;; Got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 830 ;; flags: qr 
> > aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
> > 
> > ;; QUESTION SECTION:
> > ;ns1.sbaar.com.                 IN      A
> > 
> > ;; AUTHORITY SECTION:
> > sbaar.com.              5398    IN      SOA     ns5.sbaar.com.
> > server12.sbaar.com. 2006091003 86400 7200 3600000 86400
> > 
> > ;; Query time: 1 msec
> > ;; WHEN: Wed Sep 13 10:10:44 2006
> > ;; MSG SIZE  rcvd: 80
> > 
> > 
> > # dig ns1.sbaar.com a +trace
> > 
> > ; <<>> DiG 9.3.0 <<>> ns1.sbaar.com a +trace ;; global options:  
> > printcmd
> > .                       340071  IN      NS      D.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      E.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      F.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      G.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      H.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      I.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      J.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      K.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      L.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      M.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      A.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      B.ROOT-SERVERS.NET.
> > .                       340071  IN      NS      C.ROOT-SERVERS.NET.
> > ;; Received 436 bytes from x.x.x.x#53(x.x.x.x) in 2 ms
> > 
> > com.                    172800  IN      NS      A.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      G.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      H.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      C.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      I.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      B.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      D.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      L.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      F.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      J.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      K.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      E.GTLD-SERVERS.NET.
> > com.                    172800  IN      NS      M.GTLD-SERVERS.NET.
> > ;; Received 491 bytes from 128.8.10.90#53(D.ROOT-SERVERS.NET) in 178 
> > ms
> > 
> > ns1.sbaar.com.          172800  IN      A       70.84.228.250
> > sbaar.com.              172800  IN      NS      ns3.sbaar.com.
> > sbaar.com.              172800  IN      NS      ns4.sbaar.com.
> > ;; Received 115 bytes from 192.5.6.30#53(A.GTLD-SERVERS.NET) in 172 ms
> > 
> > 
> > ---------------
> > Rasheed
> > 
> > 
> --
> ISC Training!  October 16-20, 2006, in the San Francisco Bay Area, covering
> topics from DNS to DHCP.  Email training at isc.org.
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org
> 
> 
> 
--
ISC Training!  October 16-20, 2006, in the San Francisco Bay Area,
covering topics from DNS to DHCP.  Email training at isc.org.
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org