DNS Issue or ISP Issue or Godaddy Setting?

Discussion in 'Mac OS X Server, Xserve, and Networking' started by shadyMedia, Mar 6, 2010.

  1. macrumors newbie

    Apr 6, 2009
    so we run a Mac Mini server running 10.6.2

    and we have pretty much everything up but we see one issue

    Take a Look

    Running nslookup pcvsnetworks.com we get this

    nslookup pcvsnetworks.com

    Non-authoritative answer:
    Name: pcvsnetworks.com

    which is the right IP

    But if we do


    Non-authoritative answer: name = s72-38-124-210.static.comm.cgocable.net.

    Authoritative answers can be found from:
    124.38.72.in-addr.arpa nameserver = maul.cogeco.net.
    124.38.72.in-addr.arpa nameserver = vader.cogeco.net.

    Cogeco is our ISP so that doesn't really make any sense to me if anyone could spread some light on this that would be great thanks!
  2. macrumors P6


    Apr 1, 2005
    Space--The ONLY Frontier
    That's the IP address of your modem.

    I just did a port scan did you see it?

    Here's what I got :

    Port Scan has started…

    Port Scanning host:

    Open TCP Port: 21 ftp
    Open TCP Port: 22 ssh
    Open TCP Port: 25 smtp
    Open TCP Port: 53 domain
    Open TCP Port: 80 http
    Open TCP Port: 88 kerberos
    Open TCP Port: 106 3com-tsmux
    Open TCP Port: 110 pop3
    Port Scan has completed…
  3. thread starter macrumors newbie

    Apr 6, 2009
    I know that we have a manual or rather Static IP from our ISP So thats normal it's the s72-38-124-210.static.comm.cgocable.net. that should be showing our server name
  4. macrumors 601

    Aug 15, 2005
    You need to contact your ISP and have them update the PTR record for your IP.
  5. macrumors regular

    Jul 13, 2007
    not really, remember, you may have a static ip. but you do not "own" the ip address. they actually own the 72.38 range most likely. and there for probably have it entered somehow in their own dns servers, which later get forwarded to the root internet servers.

    by registering a dns name your doing just that. buying a name. not a name and ip address. so what needs to be done is have go daddy use your isp's dns server. should probably be somewhere in the setup. i used 1and1 and actually pointed to my dyndns.org account as i did not have a static ip.

    anyway a whois shows that the isp owns the class
    Cogeco Cable Inc. CGOC-7BLK (NET-72-38-0-0-1) -
    Cogeco Cable Inc. CGOC-COMM6 (NET-72-38-112-0-1) -

    hope it helps or points you in the right direction. im not a dns guru by any means but i believe that is what is going on
  6. macrumors 601

    Aug 15, 2005
    There's no way to do that for reverse DNS.

    For reverse DNS, all DNS servers look to the owner of the IP block to determine who is authoritative for the in.addr-arpa domain of that IP. For example, once our business bought our subnets from our ISP, they handed off forward and reverse DNS to us for our block.

    In this case, it appears the OP just has a static IP and did not request a block of IPs, so reverse DNS usually stays with the ISP. Once cogeco.net updates maul and vader, it will work within 24 hours.

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