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preoblem with DNS (A) records

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  • preoblem with DNS (A) records

    So, my company has bought a hosting package. the hosting of ISP contains web, mail .... My company wants that mail server exists in the DMZ in my company.
    I have asked the ISP provider to enroll (A) record for my mail server, mail.domen.com CNAME and MX record for mail.domen.com. Provider told me that on the DNS server in the zone domen.com there is one (A) record for their DNS server and it is impossible to write another one because of nobody wouldn't see to our company website. I typed the command
    nslookup
    >server domen.com
    >ls -d domen.com
    [domen.com]
    domen.com. SOA ns1.domen-hosting.com hosting.domen.rs. (
    2012080300 86400 7200 3600000 86400)
    domen.com. MX 0 domen.com
    domen.com. MX 10 mail.domen.com
    domen.com. NS ns1.domen-hosting.com
    domen.com. NS ns2.domen-hosting.com
    domen.com. A x.x.x.55 (address of dns server)
    ftp CNAME domen.com
    localhost A 127.0.0.1
    mail CNAME domen.com
    www CNAME domen.com
    domen.com. SOA ns1.domen-hosting.com hosting.domen.rs. (
    2012080300 86400 7200 3600000 86400)
    I think it is possible to insert next domen.com. A xxx55 (DNS server address) and domen.com A xxx179 (my address MailServer) and the mail alias CNAME at domen.com A xxx179 (the address of my mail server).
    If this is not possible what I would do to resolve this problem?
    thank you

  • #2
    Re: preoblem with DNS (A) records

    which DNS records i need for my mail server that he work ok? is it A record, mx record, cname record? maybe just a record and mx record?
    thanks

    Comment


    • #3
      Re: preoblem with DNS (A) records

      MX records -- at least if you are asking about receiving email -- must point to your public IP address
      Tom Jones
      MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
      PhD, MSc, FIAP, MIITT
      IT Trainer / Consultant
      Ossian Ltd
      Scotland

      ** Remember to give credit where credit is due and leave reputation points where appropriate **

      Comment


      • #4
        Re: preoblem with DNS (A) records

        i want that my mail server receive and send mails. for that records i ask my provider that he put them in the zone?
        but in dns zone of my provider there'are not records for my mail server except mx record. dns server cannot resolve name of my server in ip address
        Last edited by gogi100; 6th November 2012, 08:33.

        Comment


        • #5
          Re: preoblem with DNS (A) records

          You need MX and A records. MX point to the A record and the A record to the mail servers public IP. You should not have MX records pointing to CNAME records.

          I would expect an ISP to know this though?

          Generally you wouldn't put mailservers in a DMZ too.

          http://en.wikipedia.org/wiki/MX_record
          cheers
          Andy

          Please read this before you post:


          Quis custodiet ipsos custodes?

          Comment


          • #6
            Re: preoblem with DNS (A) records

            Generally you wouldn't put mailservers in a DMZ too.
            why i don't put mail servers in DMZ?

            Comment


            • #7
              Re: preoblem with DNS (A) records

              Because your email servers have access to your AD infrastructure and if it gets compromised your AD structure is compromised.

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