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ISA server 2006 config

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  • ISA server 2006 config

    Hi,

    I've just taken over admin of a 2006 ISA server and i know nothing about it!

    Each of our clients have the ISA server set in their LAN connections as the proxy but i have a question:

    How does DNS work for the client? Their DNS server setting is set to a DC on the domain. When the clients try to get to a website, do they resolve the name using the internal DNS server or is it the ISA server that resolves it?

    The ISA server has 1 NIC and it also has it's DNS server set to the internal DC rather than an external DNS via an ISP. The internal DNS server has a forwarder which points to our ISP.

    Can anybody shed any light?

  • #2
    Re: ISA server 2006 config

    ISA with one nic will be configured as a proxy server and not as a firewall.
    About DNS.

    When the browser is configured with a proxy server, the proxy server will resolve all DNS traffic.
    For other traffic like browsing to a share using windows explorer the client will resolve the DNS requests on its own.

    Btw, this is not ISA only, this is with all proxies.
    Marcel
    Technical Consultant
    Netherlands
    http://www.phetios.com
    http://blog.nessus.nl

    MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
    "No matter how secure, there is always the human factor."

    "Enjoy life today, tomorrow may never come."
    "If you're going through hell, keep going. ~Winston Churchill"

    Comment


    • #3
      Re: ISA server 2006 config

      Thanks you very much for the reply!

      So the ISA server uses the internal DNS on the DC to resolve internet DNS quesries?
      Last edited by Stingray_Matt; 15th August 2008, 08:47.

      Comment


      • #4
        Re: ISA server 2006 config

        Correct according your settings
        Marcel
        Technical Consultant
        Netherlands
        http://www.phetios.com
        http://blog.nessus.nl

        MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
        "No matter how secure, there is always the human factor."

        "Enjoy life today, tomorrow may never come."
        "If you're going through hell, keep going. ~Winston Churchill"

        Comment


        • #5
          Re: ISA server 2006 config

          Ah, cool. Thanks for your help with this!

          Matt

          Comment


          • #6
            Re: ISA server 2006 config

            You're welcome
            Marcel
            Technical Consultant
            Netherlands
            http://www.phetios.com
            http://blog.nessus.nl

            MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
            "No matter how secure, there is always the human factor."

            "Enjoy life today, tomorrow may never come."
            "If you're going through hell, keep going. ~Winston Churchill"

            Comment

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