DNS server question

Discussion in 'Mac Basics and Help' started by inscrewtable, Jun 27, 2013.

  1. inscrewtable, Jun 27, 2013
    Last edited: Jun 27, 2013

    inscrewtable macrumors 65816

    inscrewtable

    Joined:
    Oct 9, 2010
    Location:
    Australia
    #1
    When I log into the router/modem with Safari it says ... Primary DNS Server 203.12.160.35 Secondary DNS Server 203.12.160.36

    But when I go into the System Prefs > Network > DNS pane it says 10.0.1.1 as the only DNS server.

    I have just run namebench and it says the current Primary DNS server is the Fastest and that it should be 10.0.1.1

    So which is really the primary dns server, is the the one that it says when I log into the router through Safari, ie 203.12.160.35 or is it 10.0.1.1 which it says in the System prefs?

    Should I add some more into the network pane?

    Also if I click the "+" in the Network>DNS pane to add another server the current 10.0.1.1 changes to 0.0.0.0 so I canceled out

    thanks
     
  2. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    Your router is resolving your machine name to its private IP address of 10.xxx.xxx.xxx but for the internet you need to have the ability to resolve domain names to their IP addresses.
     
  3. inscrewtable thread starter macrumors 65816

    inscrewtable

    Joined:
    Oct 9, 2010
    Location:
    Australia
    #3
    Does that mean I should add some other dns servers in the network prefs pane? or leave it at 10.0.1.1

    It seems to be working OK as it is with just the 10.0.1.1
     
  4. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #4
    There's no need to mess with the DNS setting within OSX or your router.
     
  5. rc135tx macrumors member

    rc135tx

    Joined:
    Feb 15, 2010
    #5
    Mike - What is your opinion of DNSCrypt?
     
  6. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #6
    If you're worried about your privacy and/or security it should help. While I use opendns, I do no use this service. Then again most of my surfing needs are quite boring :)
     
  7. SandboxGeneral Moderator

    SandboxGeneral

    Staff Member

    Joined:
    Sep 8, 2010
    Location:
    Orbiting a G-type Main Sequence Star
    #7
  8. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #8
    The way you have it set now is optimal. 10.0.1.1 is your router's IP address. Your router will cache recent DNS lookups to speed things up and that is what you want.

    What happens is say you go to google.com. Your system checks the router DNS cache for the IP address of google.com and not finding it, will then go out to the DNS server 203.12.160.35 to look it up. That result is stored in your router. Now the next time you go to google.com your system will again query the router DNS cache and this time will find the result stored from your last visit. Theoretically, this will be faster that going to the 203.12.160.35 DNS server each time.
     
  9. rc135tx macrumors member

    rc135tx

    Joined:
    Feb 15, 2010
    #9
    Thanks, Mike!

    ----------

    Thank you!!
     
  10. tnvol macrumors newbie

    Joined:
    Jul 15, 2013
    #10
    DNS and need for DDNS

    A very basic question here regarding the OS X DNS server. Is this solely managing local/private addresses (e.g., server.example.com) and still requires a DDNS service (i.e., DynDNS or No-IP) to keep a dynamic IP in sync with my domain? If I must still have a DDNS service I am wondering what benefits the DNS server brings as No-IP changes (like adding additional host names) happens in less than one minute and I must have them anyway to keep my dynamic IP in sync, correct?

    Thanks,
    Chris
     
  11. monkeybagel macrumors 65816

    Joined:
    Jul 24, 2011
    Location:
    United States
    #11
    The DNS Server in OS X is the UNIX variant of BIND. It is not doing anything unless you have turned it on and enabled it. DDNS is updating a global DNS Server with your current IP address. They are two separate entities and do not overlap in functionality.
     
  12. tnvol macrumors newbie

    Joined:
    Jul 15, 2013
    #12
    Good deal. Thanks for the clarity.
     

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