Re: Primary & Secondary DNS Server Problem
From: Brian (bhanley72_at_yahoo.com)
Date: 01/14/05
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Date: Fri, 14 Jan 2005 08:26:28 -0600
"Herb Martin" <news@LearnQuick.com> wrote in message
news:eCfTujc%23EHA.2316@TK2MSFTNGP15.phx.gbl...
> "Brian" <bhanley72@yahoo.com> wrote in message
> news:O8JhJ5b#EHA.1292@TK2MSFTNGP10.phx.gbl...
> > I set the timeout to 20 seconds and it still fails. Looks like it's OUT.
> > Also, that DNS server fails the Recursive test when I do it in the DNS
gui
> > interface.
>
> Failing the recursive test usually doesn't mean
> as much for an internal server -- it may have no
> access to the root servers (to do the recursion).
>
> Does it pass the non-recursive test? Usually this
> means you will NOT get a timeout even if you get
> an incorrect answer.
DNS2 does pass the simple (non recursive) test. But fails the recursive.
>
> > I'm wondering if I remove DNS from this server and re-add it that
> > will take care of the problem.
>
> Probably not, but if you don't mind the work involved
> in recreating the zone it is worth a try.
>
> What happens if you use the nslookup from the SAME
> server (ask itself).
When I first go to a cmd prompt and type "nslookup" on DNS2, the default
server of DNS1 comes up as it's DNS server. Is this ok? I then type "server
DNS2" to change the DNS server to itself. I can then do a DNS query for it's
own name and it returns instantly and with the correct IP address. Here is
output for both looking up itself, and looking up yahoo.com:
DNS2
Server: DNS2.corp.us
Address: 172.15.91.63
Name: DNS2.corp.us
Address: 172.15.91.63
yahoo.com
Server: DNS2.corp.us
Address: 172.15.91.63
DNS request timed out.
timeout was 2 seconds.
*** Request to DNS2.corp.us timed-out
Also, this may be a stupid question, but in the IP configuration of both my
DNS servers, I've got my internal DNS IP addresses as the DNS servers. Is
this a problem?
Thanks
>
> You might also POST the results so we can make
> sure you aren't falling for the infamous NSLookup
> "fake error."
>
> --
> Herb Martin
>
>
> > Thanks for your help!
> >
> >
> > "Herb Martin" <news@LearnQuick.com> wrote in message
> > news:%23LIMuQb%23EHA.2016@TK2MSFTNGP15.phx.gbl...
> > > "Brian" <bhanley72@yahoo.com> wrote in message
> > > news:#1Hpnka#EHA.2076@TK2MSFTNGP15.phx.gbl...
> > > > When I do an NSLookup from DNS2, it fails with DNS timeout.
> > > >
> > >
> > > What happens if you increase the timeout? Is it just slow,
> > > or really broken?
> > >
> > > nslookup -time=10 NAME dns.server.IP.address
> > >
> > > -time=10 can be 20 or whatever until you convince yourself
> > > it is OUT (or works slow.)
> > >
> > > If it is out, then it is one of:
> > >
> > > 1) DNS server not working
> > > 2) DNS server not on
> > > 3) DNS server with firewall
> > > 4) Client set to wrong DNS server address
> > > 5) Firewall or other filter BETWEEN them
> > >
> > > And remember to ignore any INITIAL error from
> > > NSLookup (on the first few lines) IF you get the
> > > answer sought down below before the command
> > > output completes.
> > >
> > > --
> > > Herb Martin
> > >
> > >
> > > >
> > > > "Mark Renoden [MSFT]" <markreno@online.microsoft.com> wrote in
message
> > > > news:eVVlFbD%23EHA.1300@TK2MSFTNGP14.phx.gbl...
> > > > > Hi Brian
> > > > >
> > > > > What happens if you do an NSLookup from DNS2 using one of the
> servers
> > > > you're
> > > > > forwarding to?
> > > > >
> > > > > Kind regards
> > > > > --
> > > > > Mark Renoden [MSFT]
> > > > > Windows Platform Support Team
> > > > > Email: markreno@online.microsoft.com
> > > > >
> > > > > Please note you'll need to strip ".online" from my email address
to
> > > email
> > > > > me; I'll post a response back to the group.
> > > > >
> > > > > This posting is provided "AS IS" with no warranties, and confers
no
> > > > rights.
> > > > >
> > > > > "Brian" <bhanley72@yahoo.com> wrote in message
> > > > > news:uaQIJ8C%23EHA.3640@tk2msftngp13.phx.gbl...
> > > > > > I've got a Win2000 AD domain.
> > > > > > Two DNS servers configured.
> > > > > > All network clients have DNS1 as their primary and DNS2 as their
> > > > secondary
> > > > > > DNS servers (XP clients).
> > > > > >
> > > > > > The other day, DNS1 crashed. During that time, no clients could
> > > resolve
> > > > > > external addresses. I was shocked. I got DNS1 back up within a
few
> > > > > > minutes,
> > > > > > but now I'm concerned as to why DNS2 is not resolving external
> > > > addresses!
> > > > > >
> > > > > > Here is output for each DNS server using nslookup for cnn.com:
> > > > > >
> > > > > > DNS1:
> > > > > >>cnn.com
> > > > > >>Server: DNS1.corp.us
> > > > > >>Address: 172.1.1.1
> > > > > >>
> > > > > >>Non-authoritative answer:
> > > > > >>Name: cnn.com
> > > > > >>Addresses: 64.236.24.12, 64.236.24.20, etc
> > > > > >
> > > > > >
> > > > > > DNS2:
> > > > > >>cnn.com
> > > > > >>Server: DNS2.corp.us
> > > > > >>Address: 172.1.1.2
> > > > > >>
> > > > > >>DNS request timed out.
> > > > > >> timeout was 2 seconds.
> > > > > >>*** Can't find address for server cnn.com: timed out
> > > > > >
> > > > > > Both servers have the same forwarders set up. Any ideas of what
I
> > > should
> > > > > > be
> > > > > > looking for?
> > > > > >
> > > > > > Thanks!
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
- Next message: Kevin D. Goodknecht Sr. [MVP]: "Re: DNS Mass Changes"
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- In reply to: Herb Martin: "Re: Primary & Secondary DNS Server Problem"
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