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Thread: Reverse DNS

  1. #1
    Join Date
    Mar 2012
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    20

    Reverse DNS

    hello,

    someone knows how to configure reverse dns on shared ip for a specific domain ?

    thank you for help,

    regards,

  2. #2
    Join Date
    May 2008
    Location
    The Netherlands
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    1,159
    You can't really configure reverse dns to resolve differently for one domain. Technically its possible to add multiple PTR records, but its not really recommended and probably wouldn't do you any good. In general, there should be only one reverse dns/ptr record for an ip address.

  3. #3
    Join Date
    Mar 2012
    Posts
    20
    based on this (see Reverse MX A records (PTR) ) :
    http://www.intodns.com/sdpinternational.com

    I added this dns record:
    135.0.196.67.in-addr.arpa PTR sdpinternational.com

    does can be good on shared ip ?
    ( based on http://www.directadmin.com/forum/sho...?t=1506&page=1 )

    Or do you know what to do to prevent this error from intodns.com ?

    thx for help,

  4. #4
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    Mar 2012
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  5. #5
    Join Date
    May 2008
    Location
    The Netherlands
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    Yes the rDNS record doesn't need to match the actual domain in this case. It only needs to resolve to A domain (which should resolve back to that ip as well). On a DA server this usually is somethine like server.hostingcompany.tld - but it can be whatever domain you want.

    Most datacenters/isps handle the PTR records for IP addresses. Theres a big chance adding them in DirectAdmin is not going to work.

    For your IP address its ns1.nac.net which answers the PTR request.

    edit: the correct term for a PTR record to point to is a FQDN, which consist of 3 parts of a domain (server.domain.tld). Im not sure, but it might be a good idea to make it the same as the FQDN in DirectAdmin, which is also being used in mail.
    Last edited by Arieh; 04-12-2012 at 11:38 AM.

  6. #6
    Join Date
    Mar 2012
    Posts
    20

    Talking

    thank you,

    now I setup it to the main domain dedicated server which is solarkit.ca

  7. #7
    Join Date
    May 2008
    Location
    The Netherlands
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    I guess you can change the fqdn at DirectAdmin -> Administrator Settings -> Server's Hostname. Remember that has to be a subdomain of your domain.

  8. #8
    Join Date
    Mar 2012
    Posts
    20
    ok that's good now :

    "
    Reverse MX A records (PTR) Your reverse (PTR) record:
    89.181.123.209.in-addr.arpa -> solarkit.ca
    135.0.196.67.in-addr.arpa -> solarkit.ca
    You have reverse (PTR) records for all your IPs, that is a good thing.
    "

    regards

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