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Windows server conection problem!Please help

Discussion in 'BlackHat Lounge' started by krluk, Sep 23, 2011.

  1. krluk

    krluk Registered Member

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    In the last 3 days i try to fix this strange problem:
    Pc:OS windows server 2008
    Managed with remote desktop
    the server is locate 2500 km from my location.I can login with remote desktop,use scrabebox from that pc,but any other software cannot conect to internet.(Mozilla,IE,windows update,kaspersky update,ping fails to any address)
     
  2. sirgold

    sirgold Supreme Member

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    Check the firewall settings, the DNS settings and the routing from command line. 99% of the time these are the main culprits.

    Also if you installed some packet filtering layer, sometimes they're known to mess up the connections "per app" that might help explaining/ debugging your problem. HTH.
     
  3. Jonny Quick

    Jonny Quick BANNED BANNED

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    Did you do something just before it stopped working? Windows Update, new software, etc...?

    Normally I'd say run a System Restore, but I don't think the "Server" Operating Systems have the System Restore feature.

    Are you certain the Operating System is Server Edition, and not standard XP/Vista/Win7 ?
     
  4. krluk

    krluk Registered Member

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    Thanks for answering!
    @sirgold:
    Firewall is disabled,antivirus unninstalled.All tests looks OK.I can acces local network,but not internet.BUT i can connect using remote desktop from another server,share folders,etc.
    Nothing installed.Just basic OS,AV and SB.

    @jonny quick
    No,just power failure and internal battery dead,after restart time was set to 2002

    Yes you are correct,this feature is not installed

    OS is windows server 2008 enterprise,version 6.0.6002 SP 2 build 6002
     
  5. krluk

    krluk Registered Member

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    here is ipconfig /all :
    Microsoft Windows [Version 6.0.6002]
    Copyright (c) 2006 Microsoft Corporation. All rights reserved.

    C:\Users\Administrator>ipconfig /all

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : WIN-ER9AFQNxxxx
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : VIA Rhine II Compatible Fast Ethernet Ada
    pter
    Physical Address. . . . . . . . . : 00-0C-6E-78-xx-xx
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::88dd:23da:5050:1c36%10(Preferred)
    IPv4 Address. . . . . . . . . . . : xx.115.xx.xx(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.xxx
    Default Gateway . . . . . . . . . : xx.115.xx.xx
    DHCPv6 IAID . . . . . . . . . . . : 251661422
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-03-C3-2E-94-00-0C-6E-78-2B-F7

    DNS Servers . . . . . . . . . . . : xx.115.xx.x
    xx.104.xx.xxx
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Tunnel adapter Local Area Connection* 8:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : isatap.{CBE5E95E-BB0F-4566-A584-3A4A7CFCA
    B8F}
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Local Area Connection* 11:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
    Physical Address. . . . . . . . . : 02-00-54-55-4E-01
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Local Area Connection* 9:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : 6TO4 Adapter
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    IPv6 Address. . . . . . . . . . . : 2002:5d73:48d3::5d73:48d3(Preferred)
    Default Gateway . . . . . . . . . :
    DNS Servers . . . . . . . . . . . : xx.115.xx.x
    xx.104.xx.xxx
    NetBIOS over Tcpip. . . . . . . . : Disabled

    C:\Users\Administrator>
     
  6. sirgold

    sirgold Supreme Member

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    Blind guessing here.

    - Consider checking if you have multiple network interfaces or interfaces in teaming/bonding with a simple "ipconfig /all".

    - Check if you have some interfaces bridged to some other interface. Installing a Virtual Machine Emulator might have been the cause.

    - Consider trying a telnet to a website from commandline on the port 80 and see if the issue is somehow the html rendering engine/weird proxy settings maybe a leftover from some funny installation.

    - Ping a domain name and then its numeric IP counterpart to see if ICMP echo/reply is going out and coming back.

    - None worked? Consider reinstalling. It's late, I'm running out of ideas... :D
     
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  7. Jonny Quick

    Jonny Quick BANNED BANNED

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    This doesn't sound right. It takes at least 5 years for the "internal battery" (aka CMOS/BIOS battery) to die. Unless you have a very old Server using more recent software (doubtful).

    If the battery DID die, there's a problem. CMOS battery issues cause all manner of flaky problems, and they are sometimes intermittant (the worst). More likely you have a motherboard problem, if this battery really did die.

    Did it get replaced?

    Who changed all the BIOS settings back to the way they were, and did that person know what they are doing? Those settings can get very "exotic", and unless either the person knows that particular machine very well, or has general knowledge and is willing to research each option they are not familiar with, it is entirely possible that some oddball setting in there is different than it used to be, which is why your performance is different.

    The first thing to do is rule-out if you have a hardware problem. Also, power outages can sometimes be VERY catastrophic. You should think of the power surge of the power coming back on as being the equivalent of a lightening strike. A good-quality Power Supply is an absolute essential, and a poor quality PSU could easily fail due to power irregularities and be the cause of your problems.

    Do you know the specs of your PSU (manufacturer, model number, rated power output) ? Or the specs of the whole system, if it is premanufactured (not custom-built, like a Dell, HP, etc...)
     
    Last edited: Sep 23, 2011
  8. krluk

    krluk Registered Member

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    Problem fixed.
    After i have reported this to the ISP,in 24 hours problem solved.
    But they state that nothing was wrong with them.But now is working.
    Thanks everyone for help.