DNS rookie

Discussion in 'Windows Small Business Server' started by sjs, Feb 28, 2007.

  1. sjs

    sjs Guest

    Hi, I'm setting up a SBS network and have what I believe is an easy DNS
    question. I have a simple network, DSL from the Internet to my SonicWall
    Firewall to my network which is made up of a DC, SBS and File Server and
    client pc's. The DC will be DHCP and DNS server. When a client is assigned
    an IP address it can't resolve URL but can ping to the Internet.

    I'm not sure how to setup the DNS server so the client pc's can resolve, I
    assume it has to somehow point to the Firewall since the Firewall is getting
    it's DNS fm the DSL provider. Is this an easy fix?!

    tks in advance,
    steve (rookie but trying!)
    sjs, Feb 28, 2007
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  2. sjs

    Jeff Teel Guest

    DNS should be configured automatically when going through the CEICW. I
    would suggest running it again and being sure that you enter the correct
    information into the wizard and see what if that fixes the resolution
    problem. Another test would be to try the same web page from the server to
    see if it will resolve. And one more thing.....do an IPCONFIG /ALL at the
    c:/ prompt from the server and from one of the workstations and post the
    results back here. That could help pin down where the problem might be.

    Jeff Teel, Feb 28, 2007
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  3. SBS must also be a DC.

    You would do better to allow SBS to do both DHCP and DNS.
    SuperGumby [SBS MVP], Feb 28, 2007
  4. sjs

    sjs Guest

    When running the DNS wizard am I promped to enter the IP address of the
    Firewall? And since the Firewall is getting it's DNS fm the DSL provider is
    that how all this DNS smoking mirrors work?

    Concerning the NIC settings on the server that's doing DNS, should it be
    pointing it's DNS to the Firewall?

    sjs, Feb 28, 2007
  5. DNS Setting on the TCIP properties of the SBS NIC should be pointing to
    itself. In DNS Console on Forwarders Tab, your ISP dns servers should be
    John Oliver, Jr. [MVP], Feb 28, 2007
  6. sjs

    Joe Guest

    The SBS may use either the firewall or preferably the ISP DNS servers
    as *forwarders* only. This is where in the CEICW you are asked for the
    ISP DNS servers. You can safely leave it blank, queries will be a little
    slower but will still work.

    The SBS must use *itself* as the only DNS *server*. The ipconfig /all
    output for the SBS must show only its own LAN IP address as DNS server.

    The workstations must also show *only* the SBS as DNS server. There
    must be no alternate servers either for workstations or SBS. The
    simplest way to achieve this is to set the workstations to obtain DNS
    information automatically as well as IP address, and use the SBS for
    DHCP serving. If you use an alternative DHCP server, you need to program
    it to provide the SBS LAN IP address as DNS server and WINS server.

    The reason for all this is that the SBS can provide DNS information for
    Internet destinations, and also for its own workstations. The latter is
    essential to network browsing and RDP to workstations, to name just
    two of the SBS functions. Other DNS servers can provide Internet DNS
    information but cannot possibly know anything about the LAN, and things
    will break if they are used.

    The only hardware on the whole network which should use external DNS
    servers is the Internet router and/or firewall. This has no need of LAN
    information, but may need Internet DNS even when the network is shut
    down or disconnected.
    Joe, Feb 28, 2007
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