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REAL MYSTERY after NIC replacement - problematic http behavior

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  • REAL MYSTERY after NIC replacement - problematic http behavior

    problematic behavior: my sbs clients cannot access most of web sites on internet, especially those which are hosted. Really strange is that they can just browse google.com + other 3-site and that is all. I also find out that I can access all web site which has their own IP (own web server)- they are not placed on server for many domains.
    Application clients like skype, icq, ftp-passive works fine. Tracert from clients works fine for all internet sites.
    I have thought that's the problem of DNS server (sbs) , but it answers correctly all my queries made by nslookup from the client station.

    Where could be the problem ?

    I really appreciate all your suggestions. Andy

    server info: SBS 2003 standard edition, 2 NICs, static IP for Internet (cable), DHCP server disabled - for long time, clients use DNS of my SBS server ( and external DNS forwards are set)

    circumstances:I replaced both nic (cards) and changed internal IP, all the changes has been made by wizards - IP change, Internet connection change. then I checked in "Routing and Remote access manager" and at the level of "network connections". Everything seems to be allright. From the server I can access all internet web sites.
    Last edited by bross7; 3rd July 2006, 07:46.

  • #2
    Re: REAL MYSTERY after NIC replacement - problematic http behavior

    from nslookup does it resolve external addresses?

    Have you got a DNS frowarder to an external DNS server for internet name resolution?

    Michael
    Michael Armstrong
    www.m80arm.co.uk
    MCITP: EA, MCTS, MCSE 2003, MCSA 2003: Messaging, CCA, VCP 3.5, 4, 5, VCAP5-DCD, VCAP5-DCA, ITIL, MCP, PGP Certified Technician

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

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    • #3
      Re: REAL MYSTERY after NIC replacement - problematic http behavior

      and how goes a tracert to an webpage?
      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"

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      • #4
        Re: REAL MYSTERY after NIC replacement - problematic http behavior

        Originally posted by m80arm
        from nslookup does it resolve external addresses?

        Have you got a DNS frowarder to an external DNS server for internet name resolution?

        Michael

        thank you


        Yes.
        Nslookup running on sbs client can resolve external addresses AND my DNS server has set DNS forwarder to an external server. From ther server I can browse all the web sites of internet. I have even tried to set external DNS servers on clients, but it didnt help.

        TRACERT works fine from clients for all web sites.
        Last edited by bross7; 2nd July 2006, 09:19.

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        • #5
          Re: REAL MYSTERY after NIC replacement - problematic http behavior

          and if you tried to open a webpage on its ip?
          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


          • #6
            Re: REAL MYSTERY after NIC replacement - problematic http behavior

            Go to the Device Manager and ask it to show all hidden devices. Do you still see your old NICs unavailable or "ghosted"? There is a special procedure for replacing NICs in SBS using the Loopback Adapter - especially the internal (LAN) NIC. If you can go back temporarily to your previous NICs and IPs, I can dig out that article for you.
            TIA

            Steven Teiger [SBS-MVP(2003-2009)]
            http://www.wintra.co.il/
            sigpic
            Iím honoured to have been selected for the SMB 150 list for 2013. This is the third time in succession (no logo available for 2011) that I have been honoured with this award.

            We donít stop playing because we grow old, we grow old because we stop playing.

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            • #7
              Re: REAL MYSTERY after NIC replacement - problematic http behavior

              Originally posted by Dumber
              and if you tried to open a webpage on its ip?
              thank you

              When I use IP it doesnt help !, then probably it is not problem of DNS ?
              Last edited by bross7; 3rd July 2006, 06:51.

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              • #8
                Re: REAL MYSTERY after NIC replacement - problematic http behavior

                Originally posted by teiger
                Go to the Device Manager and ask it to show all hidden devices. Do you still see your old NICs unavailable or "ghosted"? There is a special procedure for replacing NICs in SBS using the Loopback Adapter - especially the internal (LAN) NIC. If you can go back temporarily to your previous NICs and IPs, I can dig out that article for you.
                Thank you

                I have already deleted all in-active nics. I was changing internal NIC by adding one more card, set the tcp/ip for new and finally changed routing (by wizard). If you find the article (using internal loopback) I will really appreciate that.

                Comment


                • #9
                  Re: REAL MYSTERY after NIC replacement - problematic http behavior

                  Credit to Mick Malloy aka SuperGumby from Australia for this :

                  If it's the internal I'd do it nicely, avoid a slow restart. If it's the external I'd just uninstall it, shutdown, install the new.

                  Nice way:
                  Install the MS Loopback Adapter.
                  Uninstall the real NIC, but don't shutdown.
                  Configure loopback to same IP as real.
                  Shutdown, remove original, install new.
                  Install new drivers.
                  Remove loopback.
                  Configure real to original IP.
                  Restart

                  HTH
                  Last edited by teiger; 6th July 2006, 00:26.
                  TIA

                  Steven Teiger [SBS-MVP(2003-2009)]
                  http://www.wintra.co.il/
                  sigpic
                  Iím honoured to have been selected for the SMB 150 list for 2013. This is the third time in succession (no logo available for 2011) that I have been honoured with this award.

                  We donít stop playing because we grow old, we grow old because we stop playing.

                  Comment

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