Hi everybody,

since friday we have a strange problem with some clients and ARP answers. We notice that our switch recognize wrong MAC addresses on some ports.

We use wireshark to see what happens and we get the following:

5 clients:

1. 172.30.71.6 (XX:XX:XX:F7:52:75)
2. 172.30.41.1 (XX:XX:XX:38:d1:a8)
3. 172.30.63.1 (XX:XX:XX:c2:b0:b9)
4. 172.30.14.1 (XX:XX:XX:88:c7:4f)
5. 172.30.59.1 (XX:XX:XX:7b:67:4d)

Wireshark runs on client 1 (172.30.71.6, promiscuous mod off)

Client 5 (172.30.59.1) send a broadcast arp question (who has 172.30.41.1 - tell 172.30.59.1) and client 1 (172.30.71.6) is sending ARP replies with src = XX:XX:XX: 38:d1:a8.

172.30.41.1 (XX:XX:XX:38:d1:a8) is offline (network cable removed) and 172.30.71.6 has no entry of 172.30.41.1 (XX:XX:XX:38:d1:a8) in his arp cache.

The clients run Windows 7, Windows 8 and Windows 8.1

Why we get these phenomenon and how can we solve it? Is there maybe a problem with some updates of the last patchday? 

Thanks for the reply and kind regards

Bernd

Hi,

Since I've moved my directory My documents, My music, etc to my NAS, windows 8.1 starded synchronizing on my HDD. I've cancelled the synchronizationof of the offline files but I can't delete them.

how can I do this operation ?

thanks 

le varan

A few years ago I discovered how redirected user profile folders in Windows get Recycle Bin protection, even when the folders are redirected to a network location. This was a huge find for me, and I used this feature to add Recycle Bin coverage to some of my mapped network drives. I shared this information on another forum here:

http://forums.mydigitallife.info/threads/16974-Tip-Network-Recycle-bin

Today I figured out a better way to achieve the same goal that doesn't rely on user profile folder redirection, and am sharing that information for other users to try out. You might want to take a look at these forum topics for additional information:

• http://technet.microsoft.com/en-us/library/cc787939(v=ws.10).aspx
• http://blogs.technet.com/b/askds/archive/2012/07/16/managing-the-recycle-bin-with-redirected-folders-with-vista-or-windows-7.aspx
• http://msdn.microsoft.com/en-us/library/bb882665.aspx
• http://social.technet.microsoft.com/Forums/windowsserver/en-US/10bfcfb9-14f3-434e-9ffa-0289b8b32e01/folder-redirection-recycle-bin

The standard disclaimer applies - this might break stuff. I've only tested in Windows 8, and my testing is limited. Try this at your own risk.

This is what I've learned (or think I've learned - I might be wrong):

• Windows Vista and later store the configuration settings for the Recycle Bin for redirected user profile folders in this registry key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\BitBucket\KnownFolder
• Under this key are separate keys for each redirected folder that is protected by the Recycle Bin. The keys contain the configuration information for each protected folder, and are named to match the GUIDs for "Known Folders." A list of the Known Folder to GUID mappings is available in one of the links above.
• The registry also contains a list of "known folders" at this location: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions

So, I reasoned that if I could create my own custom "known folder," I could add that to the list of folders that were protected by the Recycle Bin and protect any mapped network drive I wanted. So I looked at the list of existing "known folders" and created a key that was similar to the Documents key. I then fiddled with the values in the key until I narrowed it down to the minimum number needed to make the recycle bin work.

This .reg file will protect a mapped X: drive with a ~50GB recycle bin. You should modify the file to fit your needs:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{9147E464-33A6-48E2-A3C9-361EFD417DEF}]
"RelativePath"="X:\\""Category"=dword:00000004"Name"="XDrive"

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\BitBucket\KnownFolder\{9147E464-33A6-48E2-A3C9-361EFD417DEF}]
"MaxCapacity"=dword:0000c7eb"NukeOnDelete"=dword:00000000

A few things of note:

• The GUID in the above .reg file {9147E464-33A6-48E2-A3C9-361EFD417DEF} came from this PowerShell command: "{"+[guid]::NewGUID().ToString().ToUpper()+"}"
• Each "known folder"/Recycle Bin combination requires a unique GUID. If you don't want to use PowerShell to generate a GUID, you can use an online GUID generator.
• I don't know what the "Category" value does, but the key I copied had it set to 4, and that works, so I didn't test any other values.
• The "Name" value is required, but is not the name that will be shown if you right-click on the Recycle Bin and select properties. (At least not in my environment.) In my environment, the name that is shown is the name of the network drive.
• Making this change adds a "Location" tab to the properties page of your mapped network drives. I suspect this could be removed by changing the "Category" value, but didn't bother to find out.
• I only tested with mapped network drives. I suspect this would work with UNC paths as well, but I didn't bother testing.

I hope you're as excited to find this as I was to figure it out. Let me know if this works for you. I now plan to deploy the registry keys with Group Policy Preferences and will update this forum post with any information I discover.

Best regards

--Russel

Update: I am now using Group Policy Preferences to deploy the needed registry keys, and all my mapped network drives are now protected by the recycle bin.

Update 2: I have tested now with UNC paths, and this works fine. I still use mapped network drives, but if your environment requires UNC paths instead, you can use them. Note however that if you have a mapped network drive that points to a UNC path, and you protect the UNC path with a registry change, if a user deletes a file from the mapped network drive that points to that UNC path, the file will be permanently deleted. See below for more details.

Hi,

I am facing an issue with a user where they are unable to keep a window of File Explorer open when on a network drive. It will stay open for a short period of time and then close.

When browsing on the local machine or  directly to the share via the UNC path the window will stay open.

Here is a link which shows the issue in which I am facing. But we are using Server 2012 as opposed to 2008 r2.

https://social.technet.microsoft.com/Forums/office/en-US/e97da3d3-6201-4b32-96f2-bcb7099a37e9/windows-81-file-explorer-unexpectedly-closes-when-on-a-network-drive?forum=w8itpronetworking

The fix which was highlighted on the above link seems to already be in place. Yet the issue is still occurring.

Is there any reason as to why this could be happening? There seems to be nothing been mentioned in Event Logs.

After installing updates from December 2014 on a handful of company laptops, I am receiving consistent bugchecks in either NDIS or NETIO once a system sits idle for approximately 20 minutes.  All the machines are running Win 8.1 Pro, and are up to date from WindowsUpdate.

In doing some forum searching, I see some similar references from a few years back (~2011) about issues with OpenVPN clients (which these machines do have), but since they are over 3 years old at this point, I doubt the issue is the same as this configuration has been working fine up until ~2-3 weeks ago.

Hitting up the forums here to see if either anyone else is seeing this problem.

Thanks in advance...

This is always caused by SonicWALL's NetExtender. It never used to do this upon until a few days ago. I post it here because it can't be NetExtender's fault, if it was working before. It happens any time I connect. Sometimes it doesn't even get to complete the connection. Memory dump got me this...

PROCESS_NAME:  ccSvcHst.exe

CURRENT_IRQL:  2

ERROR_CODE: (NTSTATUS) 0xc0000409 - The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application.

EXCEPTION_CODE: (NTSTATUS) 0xc0000409 - The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application.

Probably caused by : NETIO.SYS ( NETIO!NsiEnumerateObjectsAllParametersEx+20d )

i get the following error from device manger--> network adapters

Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)

{Unable to Load Device Driver}
%hs device driver could not be loaded.
Error Status was 0x%x

i uninstalled it but nothing was fixed

i also tried updating the driver software..!

KINDLY HELP

my model name :DELL INSPIRON N5110

Praveen Pacifier

Subject

Cannot access NAS Drives

Cannot access network attached storage

Error accessing NAS

\\Share\Folder is not accessible

Error code: 0X80070035 The network path was not found

Hi all,

I fixed a stubborn networking issue and hopefully someone else can benefit from all the frustration I have experienced over the last few days.

Some background. This was a workgroup network not a domain client/server. Also, Windows HomeGroup wizards were not used - just accounts and passwords. I have five NAS boxes for storage and backup. These NAS boxes use CIFS or SMB file systems. IP address are assigned through DHCP. It is a very simple yet secure workgroup net. Everything was OK then it hit the fan.

I installed a new router after the old one failed. I powered down the entire network, cabled up and configured the new router. On my old Vista notebook PC all five NAS devices were OK. In Vista, Windows Explorer, I could access all the folders and files on all the NAS boxes.

However on all the other systems, Windows 7 or Windows 8, I would get errors. In Windows Explorer I could see "\\MyNAS\Share\" but cannot navigate to it. 

I would get an error:

"\\MyNAS\Share\ is not accessible. You might not have permission to use this network resource. The specified network name is no longer available."

Or

"Error code: 0x80070035 The network path was not found"

Another symptom of the error: I could not access the NAS admin pages through Internet Explorer on the Win 7 or 8 systems.

I spent days trying all the fixes proposed in ALL the online search results, including many and various registry hacks, security policy changes, Windows Credential Manager changes, anti-virus and firewall removal, clearing and reregistering DHCP and DNS caches, Router and NAS reconfiguration and permissions, updating drivers and firmware, various command line tools such as ipconfig, netsh, hosts file modifications, reinstalling the TCP-IP stack, etc., etc. and ad-nauseam.

The most popular suggestion by far was Network security: LAN Manager authentication level - change the authentication level to Send LM & NTLM - use NTLMv2 session security if negotiated (or the corresponding Registry Hack).

None of it worked.  After much trial and error, finally, the only thing that worked for my situation:

1) Network and Sharing Center - Change Advanced Sharing Settings

Turn everything to OFF on all profiles and options - Save changes and close

Then

2) Device Manager - Network Adapters - Uninstall Ethernet and Wireless adapters - Action, Scan for Hardware Changes to reinstall these devices and close Device Manger.

Then

3) Network and Sharing Center - Change Advanced Sharing Settings - Turn everything to ON for all profiles and options - Save changes and close.

NAS shares now work properly and I can access the NAS admin configuration pages.

Now you can restrict some access by setting some of the Advanced sharing settings.

So simple and easy after all...

Good Luck!

mdd

Hello!

I asked this question in the Network & Connection Microsoft forum and was told to post here for help. 

My laptop isn't connecting to the nearest AP in my dorm room and instead choosing to connect to random APs that are much further away. As you can imagine, this means my wifi connection has been absolutely terrible. The signal fluctuates randomly from 1 bars, to 5 bars, and everywhere in between. I often get the ERR_NETWORK_CHANGED error page in my browser which makes me have to refresh the page and try again. I've tried forgetting and reconnecting to the university's network, enabling and disabling drivers, updating drivers, installing and reinstalling drivers, and even a windows reinstall. None of these have made any changes in my poor connection. This is on my university's wifi network, so I am unable to set up a router to fix the problem. I am in room 472 and the nearest AP is in room 474, which is literally right next door. 

Last year I was in a different, older dorm building and I experienced no network connection problems whatsoever. Could this problem be because my laptop isn't compatible with the recent technology in my newer building?

I am at a complete loss of what I should do at this point. Please help!

After applying last windows updates to Windows 8 Enterprise Edition, value of DUID is always being changed.

So I would like to know what is causing this behavior within this new version of dhcpclient. Is there any new option to set so DUID is not changed at any service restart?

This is a problem for our infrastructure since we're using reserved dhcpv6 leases set by DUID value.

In this initial version it works right, so when Dhcpv6DUID register binary value is set there is no problem with future restarts of dhcpclient service. Details of installed dlls are as follow:

Base                Size      Path
0x00000000c37f0000  0x55000   c:\windows\system32\dhcpcore.dll
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCP Client Service
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16384
        File version:   6.2.9200.16384
        Create time:    Thu Jul 26 01:07:56 2012

0x00000000c3700000  0x40000   C:\Windows\System32\dhcpcore6.dll
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCPv6 Client
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16384
        File version:   6.2.9200.16384
        Create time:    Thu Jul 26 01:08:05 2012

0x00000000c3760000  0x13000   C:\Windows\System32\dhcpcsvc6.DLL
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCPv6 Client
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16384
        File version:   6.2.9200.16384
        Create time:    Thu Jul 26 01:09:29 2012

0x00000000c36e0000  0x18000   C:\Windows\System32\dhcpcsvc.DLL
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCP Client Service
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16384
        File version:   6.2.9200.16384
        Create time:    Thu Jul 26 01:07:58 2012

After applying last updates it changes to the following version that every time dhcpclient is restarted DUID value is always being changed (this is not expected so it must be a bug):

Base                Size      Path
0x000000007e590000  0x55000   c:\windows\system32\dhcpcore.dll
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCP Client Service
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16433
        File version:   6.2.9200.16433
        Create time:    Thu Oct 11 04:26:27 2012

0x000000007eec0000  0x40000   C:\Windows\System32\dhcpcore6.dll
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCPv6 Client
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16433
        File version:   6.2.9200.16433
        Create time:    Thu Oct 11 04:26:46 2012

0x000000007eea0000  0x13000   C:\Windows\System32\dhcpcsvc6.DLL
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCPv6 Client
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16433
        File version:   6.2.9200.16433
        Create time:    Thu Oct 11 04:27:50 2012

0x000000007ee80000  0x18000   C:\Windows\System32\dhcpcsvc.DLL
        Verified:       Microsoft Windows
        Publisher:      Microsoft Corporation
        Description:    DHCP Client Service
        Product:        Microsoft« Windows« Operating System
        Version:        6.2.9200.16433
        File version:   6.2.9200.16433
        Create time:    Thu Oct 11 04:26:36 2012

Why would Windows 8.1 log the following warning message. 

EVENT_TCPIP_TCP_CONNECTIONS_PERF_IMPACTED

TCP/IP has chosen to restrict the congestion window for several connections due to a network condition.  This could be related to a problem in the TCP global or supplemental configuration and will cause  degraded throughput.

I'm seeing this logged very occasionally as a warning in the System Event Log.  Does it indicate something I should consider reconfiguring?  Is it transitory?

As far as I know, I was just using IE11 and listening to Pandora at the time of the most recent message.  Not sure but I don't think I was even watching videos at the time.  A speed test shows I have the full 21 megabit / 48 megabit speeds I'm expecting from our fiber service here.

-Noel

Dear All,

Some of Our client PCs have issue with start up Error regarding Microsoft Netfram everytime their machines start up.

and this is the details of error :

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.Runtime.InteropServices.COMException (0x8004010F): The attempted operation failed.  An object could not be found.
   at Microsoft.Office.Interop.Outlook.NameSpaceClass.GetDefaultFolder(OlDefaultFolders FolderType)
   at TeamViewerMeetingAddIn.AddIn.DoStartup()
   at TeamViewerMeetingAddIn.AddIn.CheckOnlineTimer(Object sender, EventArgs e)
   at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll
----------------------------------------
ManagedAggregator
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/Program%20Files%20(x86)/TeamViewer/outlook/ManagedAggregator.DLL
----------------------------------------
TeamViewerMeetingAddIn
    Assembly Version: 10.0.47484.0
    Win32 Version: 10.0.47484.0
    CodeBase: file:///C:/Program%20Files%20(x86)/TeamViewer/outlook/TeamViewerMeetingAddIn.DLL
----------------------------------------
System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34250 built by: FX452RTMGDR
    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34262 built by: FX452RTMGDR
    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34239 built by: FX452RTMGDR
    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
Microsoft.Office.Interop.Outlook
    Assembly Version: 15.0.0.0
    Win32 Version: 15.0.4753.1003
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Microsoft.Office.Interop.Outlook/15.0.0.0__71e9bce111e9429c/Microsoft.Office.Interop.Outlook.dll
----------------------------------------
System.Core
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR
    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
office
    Assembly Version: 15.0.0.0
    Win32 Version: 15.0.4753.1003
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/office/15.0.0.0__71e9bce111e9429c/office.dll
----------------------------------------
WindowsBase
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR
    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/WindowsBase/v4.0_4.0.0.0__31bf3856ad364e35/WindowsBase.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

What should i do?

Best regards,

VeasnaYim

First off, this issue randomly happened out of nowhere. Nothing was changed on my system before this problem happened. I used to be able to access company server network drives no problem now I cannot.

I have seen other threads on here similar issues but not the same.

Below are some notes on my scenario and things I have done already to try and resolve it.

1. I can ping the server name and IP no problem, but cannot map it.

2. It is only local to my computer, my domain account can access them on other computers and our terminal server.

3. This same computer was an image of another windows 8.1 machine and that still runs no problem.

4. I have enabled netbios and network discovery.

5. Turned off windows firewall, even though I know that's not an issue because it was working before.

6. Anti-virus and other similar programs would not affect it.

7. Changed network connection ( different cable or cable connection somewhere else, priv wifi, etc)

8. I can RDP to the servers as well.

9. Windows updates have been run numerous times as well.

I don't know if there is any adapter or how virtual network drives work or are enabled, but if that exists maybe that's my issue?

I do have a very last resort scenario. I have a backup DR image of my system I could restore to if absolutely needed, but would very much like to not do that as it's about 3 months old and would take a while for me to configure things back to the way I have it now.

Please help!

Hello Everybody,

I have a question regarding my printer server.

I always access this printer through WEB UI by its IP Address..

I don't know why when i put the IP address on address bar of web browser , Firefox, and Enter.

I got this error regarding SSL:

SSL server probably obsolete.

This is Internal IP, it's should not be relate SSL error:

also other printers i can access them through web browser with the same Range of IP..

Can you help me with that?

Best regards

VeasnaYim

Hi,

The setting described in the topic was set to 15 minutes on the workstation GPO. User complain that they get the following errors in Adobe InDesign:
The network connection was lost for the file*OpenedFile*.indd, or the file was modified by another process.

I think this setting is causing the issues.

More details about the setting: https://technet.microsoft.com/sv-se/library/cc776037(v=ws.10).aspx

My question is about the default settings on a workstation, what does "undefined" mean? What is default on a Win 8.1 machine? Should I disable the setting from the policy or set it to 99999 (effectively disabling it)?

Thanks
P-H

After upgrading from Windows 8 Pro 64bit to Windows 8.1 Pro 64bit on my Sony Vaio Duoe 13, I could not find WPA security type while configuring Wireless network manually. (only WPA2 and 802.1X are available).

I have done a lot of troubleshootings like

1-Reinstall Wirless original driver

2-Updating the wireless driver to the latest

3-Uninstall and reinstall windows 8 then upgrading again to windows 8.1

But the same.

Is there any way to add WPA to the security type?

I have this issue where when you open Network and Sharing Center it says the dependency service or group failed to start I tried almost everything and nothing worked.

The internet works with my computer but it has the limited symbol