Nslookup problem

Discussion in 'DNS Server' started by Daniel, Mar 29, 2007.

  1. Daniel

    Daniel Guest

    Is it normal for nslookup to return unknown server name for an internal dns
    server ? This is an AD dns server but domain name is not registered on the
    internet.

    Daniel
     
    Daniel, Mar 29, 2007
    #1
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  2. Is it normal for nslookup to return unknown server name for an internal dns
    If you don't have PTR record for your DNS server, then this is normal.
     
    Nick Domukhovsky, Mar 29, 2007
    #2
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  3. Daniel

    Daniel Guest

    Yes i have reverse lookup zone.In the A record i also update PTR record.
    When i use nslookup, it say can't find server name for address x.x.x.x,
    unknown server name.

    Daniel
     
    Daniel, Mar 29, 2007
    #3
  4. And if you try make reverse lookup with nslookup clearly?
    For example, run nslookup and type IP address of your DNS. If this one
    wouldn't be resolved, then you have some problems with your DNS
    configuration...
     
    Nick Domukhovsky, Mar 29, 2007
    #4
  5. Daniel

    Daniel Guest

    Can you give me an example how ? nslookup->set q=ns -> Type ip address ?

    Daniel
     
    Daniel, Mar 29, 2007
    #5
  6. Can you give me an example how ? nslookup->set q=ns -> Type ip address ?Simply run nslookup and type IP address:

    C:\nslookup_
    nslookup>192.168.0.1

    BTW your problem may be that your DNS server is multihomed and you have
    reverse lookup zone only for one subnet.
     
    Nick Domukhovsky, Mar 29, 2007
    #6
  7. Read inline please.

    In
    To use nslookup to do a PTR lookup you only need to enter the IP address,
    Example nslookup 192.168.1.1 is pretty much the same as nslookup -qtype=ptr
    1.1.168.192.in-addr.arpa., both will return the server name given by the PTR
    record. When nslookup returns "can't find server name for address
    <IPAddressOfDNS>" it means it cannot find a PTR for the DNS server's IP
    address.

    You may have inadvertently mis-named your reverse lookup zone. If the DNS
    Management console is not in "Advanced" view, it will display the name of
    the zone for example 192.168.1.x Subnet or if it is in 'Advanced' view it
    will show the zone name as 1.168.192.in-addr.arpa.



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    Kevin D. Goodknecht Sr. [MVP], Mar 29, 2007
    #7
  8. Daniel

    Daniel Guest

    Hi guys, it was my mistake that i didn;t create PTR records yet. Another
    question, i tried to ping my server fqdn but it wouldn't find the server.
    Does it have any issue with reverse zone ? Btw my DC is multihomed.

    Daniel
     
    Daniel, Mar 30, 2007
    #8
  9. Read inline please.

    In
    Multihomed DCs are very problematic if extra steps are not taken to prevent
    the wrong interface from registering in DNS.



    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps
    Send IM: http://www.icq.com/people/webmsg.php?to=296095728
    ===================================
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    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], Mar 30, 2007
    #9
  10. Daniel

    Daniel Guest

    Any idea how to ensure that it register only the interface that we want ?

    Daniel
     
    Daniel, Mar 30, 2007
    #10
  11. Daniel

    Daniel Guest

    Just want to update, that i cannot use nslookup in my win xp machine, it
    returns unknown server name. It only works in server. I've pointed to my
    internal dns.

    Daniel
     
    Daniel, Mar 30, 2007
    #11
  12. Read inline please.

    In
    The A record that has the DC's host name is controlled by the "Listen on"
    addresses on the interfaces tab of the DNS server's properties sheet.
    Or you can add this registry value for the IP addres to publish the record
    for.
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters

    On the Edit menu, point to New, and then click String Value to add the
    following registry value:
    Value name: PublishAddresses
    Data type: REG_SZ
    Value data: IP address of the server's local network adapter.

    The (same as parent folder) record is registered by the Netlogon service,
    and requires a registry entry to stop the registration, then you have to
    manually create an A record without a host name with the IP address of the
    internal interface that has file sharing enabled on it. This record resolves
    the Domain Controller's DFS \\ADDNSName\SYSVOL and \\ADDNSName\NETLOGON
    shares and one must exist for each domain controller and have the IP address
    of the interface with file sharing enabled.
    (Use regedt32)
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters

    Registry value: DnsAvoidRegisterRecords
    Data type: REG_MULTI_SZ

    LdapIpAddress



    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps
    Send IM: http://www.icq.com/people/webmsg.php?to=296095728
    ===================================
    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/
    ===================================
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    ===================================
     
    Kevin D. Goodknecht Sr. [MVP], Mar 30, 2007
    #12
  13. Daniel

    Daniel Guest

    How to create an A record without host name ? What i need to do is to make
    sure that the dns ip or interface required is listed on the "Listen on" on
    the interface tab and stop the (same as parent folder) record from register
    the external interface ?

    Daniel
     
    Daniel, Mar 31, 2007
    #13
  14. Read inline please.

    In
    Right click, select New Host, leave the name field blank and give it the IP
    address you need the name to resolve to. (Win2k barks at you saying "(same
    as parent folder) is not a valid host name" click OK to create the record
    anyway.


    What i need to do is to
    (Use regedt32)
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters

    Registry value: DnsAvoidRegisterRecords
    Data type: REG_MULTI_SZ

    LdapIpAddress

    After you add this, you have to manually add the record with the internal
    IP.


    --
    Best regards,
    Kevin D. Goodknecht Sr. [MVP]
    Hope This Helps
    Send IM: http://www.icq.com/people/webmsg.php?to=296095728
    ===================================
    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], Apr 1, 2007
    #14
  15. Daniel

    Daniel Guest

    Sorry i got abit confused. Why need to stop the (same as parent) record and
    is this for the external or internal interface ? Thanks

    Daniel
     
    Daniel, Apr 2, 2007
    #15
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