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  1.    1 Week Ago #1
    Join Date : Oct 2015
    Posts : 29
    Windows 10

    Constantly getting default gateway is not available


    This issue has been occurring for the last couple of days, my internet (wire connection) just stops working, i troubleshoot the problem and after ~30 seconds it said it fixed the :
    default gateway is not available
    and sometimes i get :
    The connection between your access point, routers, or cable modem and the internet is broken
    this 2nd error don't get fixed when it appears, it have a yellow triangle, but the internet works.
    I tried :



    • reinstalling the driver (latest version of the intel network drivier for the MSI Z270 sli)
    • those ipconfig steps (flushdns, release, etc..)
    • removed VmWare adapters (i use virtual machine sometimes)
    • installed "Complete Internet repair" ticked all the boxes and apply.


    And the issue is still occurring, knowing that all of my other devices (phones, ps4, switch, other computers) all work fine.
    any idea how i can identify the issue please ?
    The only clue that i have is that this have started occurring after i tried using DNS4ME to watch Netflix outside the U.S, but i made sure to reverse all the steps they asked to do here


    also,
    I am using 2 Routers,

    • ZTE provided by my ISP (ZXHN H367N)
    • Asus RT-N12+

    The computer with the problem is connected to the ZTE with a cable, ZTE is also having its own Wifi so my other devices can connect to it.
    The Asus router is connected to the ZTE via cable into to the available 4 ports that you use to connect any other device (i have a red port in the ZTE called WLAN but i never used that).
    The reason i use the Asus router is because it allows me to control the bandwidth for those connected to it, so am using it as a "guest wifi access point"
    Could this be the issue ?
    i am not sure what i should be looking for but is this normal :

    The 1st client is the Asus router, 2nd is this computer, is it okay that the router doesn't have an IpV6 address ?
    Internet got cut while the Asus router is completely unplugged, and after troubleshooting am getting this :




    Knowing that the Issue (default gateway is not available) is still happening even when the Asus router is completely disconnected and shutdown.

    ipconfig/all result :

    C:\WINDOWS\system32>ipconfig/all

    Windows IP Configuration

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

    Ethernet adapter Ethernet:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Intel(R) Ethernet Connection (2) I219-V
    Physical Address. . . . . . . . . : 4C-CC-6A-AE-15-4D
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::b9b3:9aeb:f92f:7b61%17(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.100.21(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : Friday, January 12, 2018 23:30:55
    Lease Expires . . . . . . . . . . : Saturday, January 13, 2018 23:30:55
    Default Gateway . . . . . . . . . : 192.168.100.1
    DHCP Server . . . . . . . . . . . : 192.168.100.1
    DHCPv6 IAID . . . . . . . . . . . : 323800170
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-9B-07-38-4C-CC-6A-AE-15-4D
    DNS Servers . . . . . . . . . . . : fe80::1%17
    192.168.100.1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Connexion réseau Bluetooth 4:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network) #4
    Physical Address. . . . . . . . . : 00-1F-81-00-08-30
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    IPv6 Address. . . . . . . . . . . : 2001:0:9d38:6abd:3819:36c6:d61d:82e(Preferred)
    Link-local IPv6 Address . . . . . : fe80::3819:36c6:d61d:82e%6(Preferred)
    Default Gateway . . . . . . . . . : ::
    DHCPv6 IAID . . . . . . . . . . . : 419430400
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-9B-07-38-4C-CC-6A-AE-15-4D
    NetBIOS over Tcpip. . . . . . . . : Disabled

    C:\WINDOWS\system32>


    Edit:

    could this help ? running ipconfig/all when the net is broken give a different result for the Tunnel adapter Teredo Tunneling Pseudo-interface, it has less more values than the "normal one"
    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes


    Thank you!
    Last edited by alaslipknot; 1 Week Ago at 18:11.
      My ComputerSystem Spec
  2.    1 Week Ago #2
    Join Date : Oct 2016
    Ontario, Canada
    Posts : 5,474
    Windows 10 Pro Build 1709

    Hi alaslipknot.

    You said this started after you installed DNS4ME. Likely this has cause corruption.

    Your router config looks fine and the way it is set up looks fine. As you said the other devices are fine that are connected to your ZTE. You also said issue happens when Asus removed. Your Asus in my opinion has nothing to do with this.

    Something is corrupt in computer.

    First I would power cycle ZTE router, easy to do and gets it out of the way.

    Next on I would reset your Network on your computer.

    Start > Settings > Network and Internet > Scroll to bottom on right hand side > Reset Network.

    You will have to install any custom communication software like VPN's and maybe your VM connections.

    I would then run the following four bolded commands. Use a Command Prompt(admin) or Powershell(admin)
    Do not key in info in brackets, there for your information.
    ipconfig /flushdns (Clear the dns cache)
    nbtstat -RR (release and refesh NetBIOS names)
    netsh int ip reset (reset ip settings)
    netsh winsock reset (Reset Winsock Catalog)

    Hopefully this sets things back to the way they were. As an alternative if you have restore points enable you could run system restore.

    We recommend Macrium Reflect to take images of your system. Easy to restore, free and reliable.

    Backup and Restore with Macrium Reflect


    Ken
      My ComputerSystem Spec
  3.    1 Week Ago #3
    Join Date : Oct 2015
    Posts : 29
    Windows 10
    Thread Starter

    Hi Caledon Ken,

    Thanks a lot for the help man!

    First I would power cycle ZTE router, easy to do and gets it out of the way.


    This just mean turn off--wait ~30sec--turn it on again right ? if yes, then done.


    I also did all the other steps you mentioned, I had a little issue with netsh int ip reset :



    I googled it and the 1st result solved the issue, so yeah now that all is done, i think i just have to wait and see.

    Also not sure if this is related but when i was running out of solution I installed MalwareByte and run a scan and it found :
    adware.elex.shrtcln withing chrome files, am a bit surprised why Windows defender didn't caught that, but yeah, glad its out.

    Thanks and i'll update this post tomorrow!

    have a good day
      My ComputerSystem Spec
  4.    1 Week Ago #4
    Join Date : Oct 2015
    Posts : 29
    Windows 10
    Thread Starter

    Update

    damn... it didn't take that long to get messed up again ...

    [IMG]blob:https://imgur.com/1587b67f-3e22-42b1-81f0-54c1a822a07d[/IMG]

    Honestly am almost sure that it's some malware messing around with my network, is there a way to debug these kind of events ? for example filter the system log to only see network related actions ?

    Thanks!
    Attached Thumbnails Attached Thumbnails Screenshot_3.png  
      My ComputerSystem Spec
  5.    1 Week Ago #5
    Join Date : Aug 2016
    S/E England
    Posts : 5,259
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by alaslipknot View Post
    ...am a bit surprised why Windows defender didn't caught that...
    It's a Potentially Unwanted Program (PUP) and Defender doesn't detect those by default. It does however have the ability to detect PUPs (or PUAs as Microsoft calls them). This is intended for use in the Enterprise, but can be turned on in any edition of Windows 10.

    Enable or Disable Windows Defender PUA Protection in Windows 10
      My ComputersSystem Spec
  6.    1 Week Ago #6
    Join Date : Aug 2016
    S/E England
    Posts : 5,259
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by alaslipknot View Post
    damn... it didn't take that long to get messed up again ...
    Malwarebytes say...

    Removal of Elex sometimes requires special instructions. You can find several examples in our Malware Removal Self-Help Guides.
    https://blog.malwarebytes.com/detections/adware-elex/
      My ComputersSystem Spec
  7.    1 Week Ago #7
    Join Date : Oct 2015
    Posts : 29
    Windows 10
    Thread Starter

    yeah but is there a way to be sure that the issue is caused by that adware ?
    any chance windows can tell what app is messing with its network settings ?
      My ComputerSystem Spec
  8.    1 Week Ago #8
    Join Date : Oct 2016
    Ontario, Canada
    Posts : 5,474
    Windows 10 Pro Build 1709

    Well as long shots sometimes pay off, did you replace lan cable?

    You said you are using the latest driver for your Lan, lets go back one or two. Note the version number in device manager before and after installing to confirm installation took.

    Also we need to temporarily shut off Windows Driver updates. Option four in the tutorial.

    Enable or Disable Driver Updates in Windows Update in Windows 10
      My ComputerSystem Spec
  9.    1 Week Ago #9
    Join Date : Oct 2015
    Posts : 29
    Windows 10
    Thread Starter

    Yes i did replace the cable (3 times)

    Also when uninstalled the driver the first time, restarted, the driver got installed again with a 2015 version, which is supposedly the one i got when i just bought (build) this pc, so i don't think it's related to that but i'll try it anyway.

    However, i still wanna know something, in the Windows event log, it must be a way to see when the network is not working right ? forget about the DNS and default gateway, the OS must log when the internet is cut off, can i see and filter that ? i want to know EXACTLY when did this started to happen, it would help a lot getting to the end of this.
      My ComputerSystem Spec
  10.    1 Week Ago #10
    Join Date : Oct 2016
    Ontario, Canada
    Posts : 5,474
    Windows 10 Pro Build 1709

    Yes I would expect that this is being recorded under the System portion of the log.

    Open the log and then use the filter on right. Exactly what you should filter for is the question. I'd start with the word connection.

    Search and there are a lot of issues with your NIC. Think I just got one, oh joy.

    Found this.

    http://www.tomshardware.com/answers/...connected.html

    I haven't tried, you have to decide suitability. After you confirm older driver doesn't work you may wish to head to intel and see what drivers and tools they have.

    Ken
      My ComputerSystem Spec

 
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