Announcement

Collapse
No announcement yet.

Strange DNS results - XP

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Strange DNS results - XP

    Hi all

    I have a laptop running XP, all patched up. Was working fine from inception til now.

    All of a sudden, it resolves pretty much everything as the wrong IP address.

    I have cleared the DNS Cache and even now, its plugged into the LAN, with the correct DHCP settings, and it will wont resolve anything properly.

    Hosts files just contains entries of Spybot immunisations, although I did try clearing it out.

    No Static DNS servers set. Windows SBS 2003 as DHCP/DNS server.

    No other computers having this issue.

    It's not like it cannot resolve an address...it does, but to wrong IP.

    I can resolve public stuff fine, it's just the domain stuff that is wrong it seems.

    Where else to look/try??

  • #2
    Re: Strange DNS results - XP

    Can you post an IPCONFIG/ALL from both the problem computer and a good one
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
    PhD, MSc, FIAP, MIITT
    IT Trainer / Consultant
    Ossian Ltd
    Scotland

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

    Comment


    • #3
      Re: Strange DNS results - XP

      Sure:

      Problem:

      DHCP Enabled: Yes
      Autoconfiguration Enabled: Yes
      IP Address: 192.168.80.86
      Subnet Mask: 255.255.255.0
      Default Gateway: 192.168.80.1
      DHCP Server: 192.168.80.10
      DNS Servers: 192.168.80.10
      Primary WINS Server: 192.168.80.10
      Lease Obtained: 01 October 2010 12:31:26
      Lease Expires: 09 October 2010 12:31:26

      OK PC:

      DHCP Enabled. . . . . . . . . . . : Yes
      Autoconfiguration Enabled . . . . : Yes
      Link-local IPv6 Address . . . . . : xxxx::c167:e66f:420e:7446%12(Preferred)
      IPv4 Address. . . . . . . . . . . : 192.168.80.89(Preferred)
      Subnet Mask . . . . . . . . . . . : 255.255.255.0
      Lease Obtained. . . . . . . . . . : 01 October 2010 12:42:02
      Lease Expires . . . . . . . . . . : 09 October 2010 12:42:02
      Default Gateway . . . . . . . . . : 192.168.80.1
      DHCP Server . . . . . . . . . . . : 192.168.80.10
      DHCPv6 IAID . . . . . . . . . . . : 218111803
      DHCPv6 Client DUID. . . . . . . . : xx-xx-xx-01-10-32-58-5E-00-1F-3B-D9-6A-B9

      DNS Servers . . . . . . . . . . . : 192.168.80.10
      Primary WINS Server . . . . . . . : 192.168.80.10
      NetBIOS over Tcpip. . . . . . . . : Enabled

      Comment


      • #4
        Re: Strange DNS results - XP

        Example problem:

        OK PC:

        Ping server1

        Pinging server1.domain.com [192.168.80.10] with 32 bytes of data:

        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128

        Ping -a 192.168.80.10

        Pinging server1.domain.com [192.168.80.10] with 32 bytes of data:

        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128

        Problem PC:

        Ping server1

        Pinging server1.domain.com [192.168.80.59] with 32 bytes of data:

        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128

        Ping -a 192.168.80.10

        Pinging server1.domain.com [192.168.80.10] with 32 bytes of data:

        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.10: bytes=32 time=1ms TTL=128

        Ping -a 192.168.80.59

        Pinging 192.168.80.59 with 32 bytes of data:

        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128
        Reply from 192.168.80.59: bytes=32 time=1ms TTL=128

        Weird?

        Comment


        • #5
          Re: Strange DNS results - XP

          First thing i would do is create a blank HOSTS file and try again. Backup the original file first though.

          Then i'd clear the DNS cache on the problem machine using ipconfig /flushdns. You could also try using the same command on your DNS server.

          Next flush the arp cache on your machine using arp -d *

          Then flush the WINS cache using nbtstat -R

          Re-register with DNS and WINS using ipconfig /registerdns then nbtstat -RR

          All of these commands are done in a command prompt window

          Comment

          Working...
          X