Reverse Lookup Zone for Subnet

Discussion in 'DNS Server' started by Kristina Zelko, Aug 30, 2004.

  1. Hi All,

    We have Windows Server 2003 DNS running. Actual we changed with our ISP to
    hidden primary. The Forward Lookup Zones work fine. Only the Reverse Lookup
    Zone don't wantet to talk to the DNS of our ISP.

    We got the Subnet xxx.xxx.xxx.96 255.255.255.240
    I made a Reverse Lookup Zone 96/28.xxx.xxx.xxx.in-addr.arpa
    but when the DNS of our ISP ask our DNS, our DNS forwarded the question to
    the DNS of our ISP

    Here is our zone file configuration:
    ;
    ; Database file 96_28.xxx.xxx.xxx.in-addr.arpa.dns for
    96/28.xxx.xxx.xxx.in-addr.arpa zone.
    ; Zone version: 2004082307
    ;

    @ IN SOA ns.domain.de. hostmaster.domain.de. (
    2004082307 ; serial number
    900 ; refresh
    600 ; retry
    86400 ; expire
    3600 ) ; default TTL

    ;
    ; Zone NS records
    ;

    @ NS ns1.isp.de.
    ns1.isp.de. A xxx.xxx.xxx.xxx
    @ NS ns1.isp.de.
    ns1.isp.de. A xxx.xxx.xxx.xxx

    ;
    ; Zone records
    ;

    100 PTR host.domain.de.


    Does anyone knows problems with this configuration? Or is this configuration
    wrong?

    Any advice would be nice.

    Tanks,
    Kristina
     
    Kristina Zelko, Aug 30, 2004
    #1
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  2. In comments
    Then Kevin replied below:
    There are several different methods ISPs use to delegate reverse lookup
    zones, you are asking a question that is impossible to answer without know
    how it was delegated, if it has been delegated.

    If you can't post the IP addresses here, you can use www.dnsstuff.com to see
    where the delegation stops and how it is delegated.

    The last delegation I had my ISP do for me I had to create the PTR records
    in the Forward lookup zone, reverse delegations are done with CNAME records
    so without knowing what the CNAME is I can't tell you what is wrong.



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    Kevin D. Goodknecht Sr. [MVP], Aug 30, 2004
    #2
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  3. Hiding ip addresses like this is really inconvenient; I could have
    helped you with your answer, because I need to find out how the ISP
    had delegated you the reverse zone, quite often they create cname
    records so they don't have to mess about with data at the root
    nameservers, so you need to create a slightly different reverse zone.

    Andrew.
     
    Andrew Hodgson, Sep 1, 2004
    #3
  4. Kristina Zelko

    Grant Taylor Guest

    How is your ISP doing the delegation? Is your ISP using RFC 2317
    "Classless IN-ADDR.ARPA delegation"?

    Or are they setting up an NS record in place of a PTR record?

    Or something else?
    I can't get any thing to reverse from where I'm at.
    Tell us more about how your ISP is delegating reverse DNS for your IPs
    to you.

    Can / will you give us examples of what they have put in their zone
    file(s)? Likewise with what you have put in your zone file(s).



    Grant. . . .
     
    Grant Taylor, Jun 6, 2010
    #4
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