Missing A records in cache

Discussion in 'DNS Server' started by Chris Ramsay, Feb 12, 2008.

  1. Chris Ramsay

    Chris Ramsay Guest

    Hello,

    I am having a strange problem with resolving names to one specific internet
    domain. On occasion my DNS servers will lose the ability to resolve the
    t-systems.at domain. Clearing the cache re-enables the servers ability to
    resolve the t-systems.at domain. When I click on advanced view and look at
    the cache I see that the t-systems folder contains the following:

    (same as parent folder) - Name Server (NS) - ns1.t-systems.at.
    ns1 - Host(A) - 212.31.86.100

    On the occasions when I cannot resolve the domain I have noticed that the
    cache record for t-systems.at is missing the A record. It only contains the
    NS record for ns1.t-systems.at.

    My best guess is that without this A record, the ns1.t-systems.at name
    server is unresolveable and clearing the cache forces my dns server to issue
    a query out to get the t-systems.at information. Thus name lookups fail
    until the cache is cleared and the t-systems folder is repopulated.

    Can anyone shed some light on why the cache might be missing this
    information. It prevents us from sending email to this domain.

    Thanks in advance,
    Chris
     
    Chris Ramsay, Feb 12, 2008
    #1
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  2. Read inline please.

    In
    The NS record has a Ttl of 86400 seconds (1 day), while the A record has a
    Ttl of only 300 seconds. Even after the Ttl expires on the A record, DNS
    will use recursion to resolve the A record, because it knows the name to
    look for and start the 300 second countdown again.



    --
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    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

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    Kevin D. Goodknecht Sr. [MVP], Feb 13, 2008
    #2
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  3. Chris Ramsay

    Chris Ramsay Guest

    Hello,

    Thanks for the response.

    I would think that is what is happening but it is not. Once the A record
    disappears from cache, the name becomes unresolveable until the cache is
    cleared and repopulated with both the A and NS records. As I mentioned this
    only happens with this one site. Any idea why my DNS server would not look
    up the A record again?

    Thanks,
    Chris
     
    Chris Ramsay, Feb 15, 2008
    #3
  4. Read inline please.

    In
    Does that DNS server have a forwarder?
    If it does, check that the forwarder supports recursion.
    Check that the DNS server is able to use recursion. Use the Monitoring tab
    to test that it can do simple and recursive lookups.



    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

    ===================================
    When responding to posts, please "Reply to Group"
    via your newsreader so that others may learn and
    benefit from your issue, to respond directly to
    me remove the nospam. from my email address.
    ===================================
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    http://message.wftx.us/
    ===================================
    Use Outlook Express?... Get OE_Quotefix:
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    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Feb 15, 2008
    #4
  5. Chris Ramsay

    Chris Ramsay Guest

    Hello,

    Yes recursion is enabled and the DNS server works just fine using standard
    root hints. The problem seems to be that if the server finds a folder with
    the domain name in its cache file, it will not use recursion to find any
    missing or incomplete information inside of that folder.

    The proof of this is that I can delete just the t-systems folder from cache
    and the dns server begins resolving the name normally again. A while later
    though, the A records disappear from the t-systems folder leaving just the ns
    records and dns queries for t-systems fail until I remove the folder again.

    Thanks,
    Chris
     
    Chris Ramsay, Feb 15, 2008
    #5
  6. Read inline please.

    In
    The TTl on the A record is only 5 minutes. There sould be no reason why it
    cannot resolve the A record even with the NS record in cache, because it
    would get the A record from the at TLD servers.



    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

    ===================================
    When responding to posts, please "Reply to Group"
    via your newsreader so that others may learn and
    benefit from your issue, to respond directly to
    me remove the nospam. from my email address.
    ===================================
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    http://message.wftx.us/
    ===================================
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    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Feb 16, 2008
    #6
  7. For several hours I'm getting this same problem but not for one domain but
    for all remote domains! It's happening for 4 different servers in different
    locations, all Windows 2003 R2. My DNS system is unusable. Local domain
    resolving works normal.

    Please help!
    Przemo
     
    Przemo Karlikowski, Feb 17, 2008
    #7
  8. Read inline please.

    In
    Do you have forwarding enabled to your ISP (or router if it supports) on the
    Forwarders tab?



    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

    ===================================
    When responding to posts, please "Reply to Group"
    via your newsreader so that others may learn and
    benefit from your issue, to respond directly to
    me remove the nospam. from my email address.
    ===================================
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    ===================================
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    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Feb 18, 2008
    #8
  9. Read inline please.

    In
    Are you still having a problem?
    I notice that there has been a change in the TTL for both the NS record and
    A record, both now have TTL of 3 hours.

    When you run nslookup ns1.t-systems.at. against your DNS does it fail?
    Are you using a Forwarder?
    If so, what is the forwarder's IP address?
    Does the forwarder answer correctly when you run
    nslookup -qtype=ns t-systems.at <ForwarderIP>

    IF it doesn't run it with the debug switch
    nslookup -d2 -qtype=ns t-systems.at <ForwarderIP>

    Create two batch files, one with the NameServer lookup against the at
    servers and one with the a record lookup for ns1.t-systems.at.
    Use this command and attach the txt file output to your next post.



    nslookup -qtype=ns t-systems.at. 193.171.255.2
    nslookup -qtype=ns t-systems.at. 192.92.125.2
    nslookup -qtype=ns t-systems.at. 81.91.161.98
    nslookup -qtype=ns t-systems.at. 87.233.175.130
    nslookup -qtype=ns t-systems.at. 192.76.243.2
    nslookup -qtype=ns t-systems.at. 195.66.241.82
    nslookup -qtype=ns t-systems.at. 204.152.184.202
    nslookup -qtype=ns t-systems.at. 206.65.170.101
    nslookup -qtype=ns t-systems.at. 210.81.13.181

    nsbatchfilename.bat >t-systemsNS.txt

    nslookup -qtype=a ns1.t-systems.at. 193.171.255.2
    nslookup -qtype=a ns1.t-systems.at. 192.92.125.2
    nslookup -qtype=a ns1.t-systems.at. 81.91.161.98
    nslookup -qtype=a ns1.t-systems.at. 87.233.175.130
    nslookup -qtype=a ns1.t-systems.at. 192.76.243.2
    nslookup -qtype=a ns1.t-systems.at. 195.66.241.82
    nslookup -qtype=a ns1.t-systems.at. 204.152.184.202
    nslookup -qtype=a ns1.t-systems.at. 206.65.170.101
    nslookup -qtype=a ns1.t-systems.at. 210.81.13.181

    Alookupbatch.bat >t-systemsA.txt


    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

    ===================================
    When responding to posts, please "Reply to Group"
    via your newsreader so that others may learn and
    benefit from your issue, to respond directly to
    me remove the nospam. from my email address.
    ===================================
    http://www.lonestaramerica.com/
    http://support.wftx.us/
    http://message.wftx.us/
    ===================================
    Use Outlook Express?... Get OE_Quotefix:
    It will strip signature out and more
    http://home.in.tum.de/~jain/software/oe-quotefix/
    ===================================
    Keep a back up of your OE settings and folders
    with OEBackup:
    http://www.oehelp.com/OEBackup/Default.aspx
    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Feb 18, 2008
    #9
  10. Chris Ramsay

    Chris Ramsay Guest

    Hello,

    thanks for your time on this. I pasted the results below. One interesting
    thing is that I went ahead and as a test, added an explicit forwarder for
    t-systems.at and pointed it to the IP addresses for ns1.t-systems.at and
    ns2.t-systems.at. When I did that, the A records were added back into the
    cache as expected and everything began to work fine. This prompted me to
    check my root hints server list hoping it was out of date, unfortunately
    (depending on how you look at it), the root hints were all current. Here is
    the result of the two bat files:


    ----------------------------------------------------------------------------------------------
    H:\>nslookup -qtype=ns t-systems.at. 193.171.255.2
    (root) nameserver = l.root-servers.net
    (root) nameserver = m.root-servers.net
    (root) nameserver = a.root-servers.net
    (root) nameserver = b.root-servers.net
    (root) nameserver = c.root-servers.net
    (root) nameserver = d.root-servers.net
    (root) nameserver = e.root-servers.net
    (root) nameserver = f.root-servers.net
    (root) nameserver = g.root-servers.net
    (root) nameserver = h.root-servers.net
    (root) nameserver = i.root-servers.net
    (root) nameserver = j.root-servers.net
    (root) nameserver = k.root-servers.net
    a.root-servers.net internet address = 198.41.0.4
    a.root-servers.net AAAA IPv6 address = 2001:503:ba3e::2:30
    b.root-servers.net internet address = 192.228.79.201
    c.root-servers.net internet address = 192.33.4.12
    d.root-servers.net internet address = 128.8.10.90
    e.root-servers.net internet address = 192.203.230.10
    f.root-servers.net internet address = 192.5.5.241
    f.root-servers.net AAAA IPv6 address = 2001:500:2f::f
    g.root-servers.net internet address = 192.112.36.4
    h.root-servers.net internet address = 128.63.2.53
    h.root-servers.net AAAA IPv6 address = 2001:500:1::803f:235
    i.root-servers.net internet address = 192.36.148.17
    j.root-servers.net internet address = 192.58.128.30
    Server: UnKnown
    Address: 193.171.255.2:53

    t-systems.at nameserver = ns2.t-systems.at
    t-systems.at nameserver = ns1.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 192.92.125.2
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 192.92.125.2:53

    t-systems.at nameserver = ns2.t-systems.at
    t-systems.at nameserver = ns1.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 81.91.161.98
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 81.91.161.98:53

    t-systems.at nameserver = ns2.t-systems.at
    t-systems.at nameserver = ns1.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 87.233.175.130
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 87.233.175.130:53

    t-systems.at nameserver = ns1.t-systems.at
    t-systems.at nameserver = ns2.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 192.76.243.2
    Server: UnKnown
    Address: 192.76.243.2:53

    t-systems.at nameserver = ns1.t-systems.at
    t-systems.at nameserver = ns2.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 195.66.241.82
    Server: UnKnown
    Address: 195.66.241.82:53

    t-systems.at nameserver = ns1.t-systems.at
    t-systems.at nameserver = ns2.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 204.152.184.202
    Server: UnKnown
    Address: 204.152.184.202:53

    t-systems.at nameserver = ns1.t-systems.at
    t-systems.at nameserver = ns2.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 206.65.170.101
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 206.65.170.101:53

    t-systems.at nameserver = ns1.t-systems.at
    t-systems.at nameserver = ns2.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    H:\>nslookup -qtype=ns t-systems.at. 210.81.13.181
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 210.81.13.181:53

    t-systems.at nameserver = ns1.t-systems.at
    t-systems.at nameserver = ns2.t-systems.at
    ns1.t-systems.at internet address = 212.31.86.100
    ns2.t-systems.at internet address = 212.31.88.100

    -------------------------------------------------------------------------------

    H:\>nslookup -qtype=a ns1.t-systems.at. 193.171.255.2
    (root) nameserver = i.root-servers.net
    (root) nameserver = j.root-servers.net
    (root) nameserver = k.root-servers.net
    (root) nameserver = l.root-servers.net
    (root) nameserver = m.root-servers.net
    (root) nameserver = a.root-servers.net
    (root) nameserver = b.root-servers.net
    (root) nameserver = c.root-servers.net
    (root) nameserver = d.root-servers.net
    (root) nameserver = e.root-servers.net
    (root) nameserver = f.root-servers.net
    (root) nameserver = g.root-servers.net
    (root) nameserver = h.root-servers.net
    a.root-servers.net internet address = 198.41.0.4
    a.root-servers.net AAAA IPv6 address = 2001:503:ba3e::2:30
    b.root-servers.net internet address = 192.228.79.201
    c.root-servers.net internet address = 192.33.4.12
    d.root-servers.net internet address = 128.8.10.90
    e.root-servers.net internet address = 192.203.230.10
    f.root-servers.net internet address = 192.5.5.241
    f.root-servers.net AAAA IPv6 address = 2001:500:2f::f
    g.root-servers.net internet address = 192.112.36.4
    h.root-servers.net internet address = 128.63.2.53
    h.root-servers.net AAAA IPv6 address = 2001:500:1::803f:235
    i.root-servers.net internet address = 192.36.148.17
    j.root-servers.net internet address = 192.58.128.30
    Server: UnKnown
    Address: 193.171.255.2:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 192.92.125.2
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 192.92.125.2:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 81.91.161.98
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 81.91.161.98:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 87.233.175.130
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 87.233.175.130:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 192.76.243.2
    Server: UnKnown
    Address: 192.76.243.2:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 195.66.241.82
    Server: UnKnown
    Address: 195.66.241.82:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 204.152.184.202
    Server: UnKnown
    Address: 204.152.184.202:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 206.65.170.101
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 206.65.170.101:53


    H:\>nslookup -qtype=a ns1.t-systems.at. 210.81.13.181
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 210.81.13.181:53
     
    Chris Ramsay, Feb 19, 2008
    #10
  11. Read inline please.

    In
    What is the Forwarder you are using for all other DNS domains?

    What I find weird is when you queried the at servers for ns1.t-systems.at,
    you didn't get an answer, you should have gotten a referral along with the
    NS records.
    If you're wondering why the Root Servers are listed, that's nslookup doing
    it's normal PTR lookup.

    W:\>nslookup -qtype=a ns1.t-systems.at. 192.92.125.2
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 192.92.125.2

    Name: ns1.t-systems.at
    Served by:
    - ns1.t-systems.at
    212.31.86.100
    t-systems.at
    - ns2.t-systems.at
    212.31.88.100
    t-systems.at

    Here's the same query with Dig.
    W:\>dig ns1.t-systems.at @192.92.125.2

    ; <<>> DiG 9.2.1 <<>> ns1.t-systems.at @192.92.125.2
    ;; global options: printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41
    ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2

    ;; QUESTION SECTION:
    ;ns1.t-systems.at. IN A

    ;; AUTHORITY SECTION:
    t-systems.at. 10800 IN NS ns2.t-systems.at.
    t-systems.at. 10800 IN NS ns1.t-systems.at.

    ;; ADDITIONAL SECTION:
    ns1.t-systems.at. 10800 IN A 212.31.86.100
    ns2.t-systems.at. 10800 IN A 212.31.88.100

    ;; Query time: 531 msec
    ;; SERVER: 192.92.125.2#53(192.92.125.2)
    ;; WHEN: Wed Feb 20 06:42:10 2008
    ;; MSG SIZE rcvd: 98


    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

    ===================================
    When responding to posts, please "Reply to Group"
    via your newsreader so that others may learn and
    benefit from your issue, to respond directly to
    me remove the nospam. from my email address.
    ===================================
    http://www.lonestaramerica.com/
    http://support.wftx.us/
    http://message.wftx.us/
    ===================================
    Use Outlook Express?... Get OE_Quotefix:
    It will strip signature out and more
    http://home.in.tum.de/~jain/software/oe-quotefix/
    ===================================
    Keep a back up of your OE settings and folders
    with OEBackup:
    http://www.oehelp.com/OEBackup/Default.aspx
    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Feb 20, 2008
    #11
  12. Chris Ramsay

    Chris Ramsay Guest

    Hi,

    I don't use forwarders normally, all queries outside of my AD domain zone
    are handled through recursion to the root hints servers.

    As it turns out I do get a response from when I query the root hints server,
    it is BAD ERROR VALUE. I noticed that when I ran it, the error dumped to std
    error instead of standard out. Thats why it wasn't included in the text.
    This is what the query looks like when submitted from my workstation.

    Microsoft Windows [Version 6.0.6000]
    Copyright (c) 2006 Microsoft Corporation. All rights reser

    H:\>nslookup -qtype=a ns1.t-systems.at. 192.92.125.2
    (root) nameserver = M.ROOT-SERVERS.NET
    (root) nameserver = H.ROOT-SERVERS.NET
    (root) nameserver = G.ROOT-SERVERS.NET
    (root) nameserver = L.ROOT-SERVERS.NET
    (root) nameserver = C.ROOT-SERVERS.NET
    (root) nameserver = J.ROOT-SERVERS.NET
    (root) nameserver = B.ROOT-SERVERS.NET
    (root) nameserver = F.ROOT-SERVERS.NET
    (root) nameserver = E.ROOT-SERVERS.NET
    (root) nameserver = D.ROOT-SERVERS.NET
    (root) nameserver = A.ROOT-SERVERS.NET
    (root) nameserver = I.ROOT-SERVERS.NET
    (root) nameserver = K.ROOT-SERVERS.NET
    Server: UnKnown
    Address: 192.92.125.2:53

    *** UnKnown can't find ns1.t-systems.at.: BAD ERROR VALUE
     
    Chris Ramsay, Feb 20, 2008
    #12
  13. Read inline please.

    In
    Something seems to be blocking iterative lookups to the at ccTLD servers,
    you may get this same message if the query is refused.


    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps

    ===================================
    When responding to posts, please "Reply to Group"
    via your newsreader so that others may learn and
    benefit from your issue, to respond directly to
    me remove the nospam. from my email address.
    ===================================
    http://www.lonestaramerica.com/
    http://support.wftx.us/
    http://message.wftx.us/
    ===================================
    Use Outlook Express?... Get OE_Quotefix:
    It will strip signature out and more
    http://home.in.tum.de/~jain/software/oe-quotefix/
    ===================================
    Keep a back up of your OE settings and folders
    with OEBackup:
    http://www.oehelp.com/OEBackup/Default.aspx
    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Feb 21, 2008
    #13
  14. Did you guys get this figured out??? Same deal, just always the same domain in cache that fails. We also use OpenDNS (paid version) for forward all external requests to.
     
    Tony Messerschmidt, May 4, 2011
    #14
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