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Thread: reverse dns?

  1. #1
    Join Date
    Aug 2002
    Posts
    259

    reverse dns?

    Does revers DNS apply for server or each virtual hosting?

    thanks

  2. #2
    Reverse dns applies to each IP address, that's the only thing that will do a reverse query.

    I'm not sure if I answered the question (not entirely sure if I understood the question).

    But something like an apache vhost will probably have the reverse lookup be your hosts name.

    Cya,
    Cloak

  3. #3
    Join Date
    Aug 2002
    Posts
    259

    thanks

    I am confused with few Reverse DNS with some thread there.

    Reverse dns mean when you type IP address on the browser it will go to the domain right.

    I mean IP to host.

    Am I right?

    Thanks

  4. #4
    Reverse dns is when you lookup an IP and it productes a name, IP > Name

    Forward dns is when you lookup a domain and it returns the IP.

    Reverse dns, you can have only one IP to a one name. Forward, you can have many names to an IP.

    Hope that helps.
    Cya,
    Cloak

  5. #5
    No, it means that when you do a DNS lookup for an IP it will come up with the host name.

    for example

    nslookup www.webhostingtalk.com will give you 207.218.223.148

    and

    nslookup 207.218.223.148 will give you panther1.webhostingtalk.com, which is the real name for that host.

    I hope this helps.

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  6. #6
    Join Date
    Aug 2002
    Posts
    259

    hi

    Thanks guys.

    if it comes

    ]nslookup 69.xx.xx.xx
    Note: nslookup is deprecated and may be removed from future releases.
    Consider using the `dig' or `host' programs instead. Run nslookup with
    the `-sil[ent]' option to prevent this message from appearing.
    Server: 127.0.0.1
    Address: 127.0.0.1#53

    ** server can't find xx.xx.xx.69.in-addr.arpa: SERVFAIL

    It means that there is no reverse dns setup right?

    Thanks

  7. #7
    Either not setup, or setup incorrectly.

    The other thing that comes to mind is whether you have reverse dns control delegated to you or not. That's an issue you'd have to find out from your upstream provider.

    Cya,
    Cloak

  8. #8
    Join Date
    Aug 2002
    Posts
    259

    hi

    Do you mean ISP of my server or root of the name server?

    Thanks

  9. #9

    Red face reverse dns

    Yes you can. but you must said to upstream provider... for your's ip can delegation to your's DNS box... and then you must add one by one IP for each virtualhosting.


    ---------------------------------
    Does revers DNS apply for server or each virtual hosting?

    thanks

  10. #10
    Join Date
    Aug 2002
    Posts
    259

    Thanks for your info

    After Upstream provider enabled the reverse dns. What should I have to do to in my server?

    if you have an expampled please let me know.


    Thanks all of you.

  11. #11
    Join Date
    Aug 2002
    Posts
    647
    what is purpose for setting up reverse dns?

    when i nslookup my ip it does return my host name but i do not know what is it and what would be the problem if reverse dns is not setup.

  12. #12
    Join Date
    Apr 2002
    Location
    Cornfield
    Posts
    131
    To check who reverse DNS is delegated to, use
    nslookup type=NS xx.xx.xx.in-addr.arpa, replacing the xx's with the standard arpa notation for the class C you're looking up.
    Fire extinguisher extraordinare
    -------------------------------
    FastServers.Net NOC Admin

  13. #13
    Join Date
    Mar 2002
    Posts
    196
    Originally posted by MarlboroMan
    To check who reverse DNS is delegated to, use
    nslookup type=NS xx.xx.xx.in-addr.arpa, replacing the xx's with the standard arpa notation for the class C you're looking up.
    Where could we set up reverse DNS on the Fastservers.net dedicated servers?
    Do we need to ask he.net for setting up?

  14. #14
    Join Date
    Aug 2002
    Posts
    259

    hi

    Hi,

    I understand some of the mail server request reverse dns
    to receive a mail. If i do the reverse dns for main IP address of the server then it should be able to receive mail.

    Anyone has any suggestions.

    Thanks

  15. #15
    Join Date
    Nov 2001
    Location
    Ann Arbor, MI
    Posts
    2,978
    FYI, there really is no such thing as "reverse DNS".

    The term "reverse DNS", although a misnomer, is commonly used to mean doing a "non-reverse" lookup on the infrastructure in-addr.arpa domain.
    -Mark Adams
    www.bitserve.com - Secure Michigan web hosting for your business.
    Only host still offering a full money back uptime guarantee and prorated refunds.
    Offering advanced server management and security incident response!

  16. #16
    Join Date
    Aug 2002
    Posts
    259

    ok

    Hi,

    If my upstream provider did reverse lookup for IP, what should I have to do in order to make reverse lookup.


    Note: nslookup is deprecated and may be removed from future releases.
    Consider using the `dig' or `host' programs instead. Run nslookup with
    the `-sil[ent]' option to prevent this message from appearing.
    Server: 66.xxxxxxx
    Address: 66.xxxxxx#53

    ** server can't find xxxxx.in-addr.arpa: NXDOMAIN

    I want to get real server name.


    some body help me, cuz one of my clinet email is rejecting for this reason.

    I dont have knowledge in in-addr.arpa.

    Thansk in advance.

  17. #17
    Join Date
    Nov 2001
    Posts
    5,383
    Submit a ticket at ticketresponse.com

    They will take care of it (fastservers)
    Clustered Hosting With Continuous Data Protection (CDP)
    http://www.solidinternet.com
    8 Years of hosting excellence!

  18. #18
    Join Date
    Aug 2002
    Posts
    259

    hi

    Hi,

    This is how I set up Reverse Dns on my server and still doesn't work.



    ns1 14400 IN A 69.1.2.3
    ns2 14400 IN A 69.2.3.4

    3.2.1.69.in-addr.arpa. 14400 IN PTR ns1.abcd.com.
    4.3.2.69.in-addr.arpa. 14400 IN PTR ns2.abcd.com.


    Also upstream provider has been set up.


    Thanks

  19. #19
    Join Date
    Jun 2001
    Posts
    960
    How do I check if my webhost provider has enabled reverse DNS on my server? Do we need to contact the webhost each time we add new domain (IP-based account) on the box to setup reverse DNS?

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