Windows Networking





The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.

Share tech news, updates, or what's on your mind.

Sign up to Post

I have a Windows Adv Firewall GPO with several rules that have several IP subnets in each rule.  We are moving to a new building, and the subnets are changing.  So I have a lot of subnets to add/remove for a bunch of rules.  Is there an easy way to make bulk changes to the scope of a firewall GPO from the command line?  I found one example where someone used an answer file. But the example lacked so many details, I couldn't quite determine how to use it to make "scope" changes.

I would really like to avoid clicking through all the subnet add/delete's.  

We are mostly Windows 7 with a growing Windows 10 user base.  Our DC's are W2K12 R2.

Any and all advice is greatly appreciated!!
Become a Microsoft Certified Solutions Expert
LVL 13
Become a Microsoft Certified Solutions Expert

This course teaches how to install and configure Windows Server 2012 R2.  It is the first step on your path to becoming a Microsoft Certified Solutions Expert (MCSE).

Windows 7 Network Adapter to modem; Network Adapter IP address setting has no subnet mask. It looks like this:
TCP/IPv4 Properties "Use the following IP address:"The instructions then say, "The IP address you manually assigned to the new dial-up network adapter ( functions as a gateway to any valid IP address on that subnet."

There is no place for me to specify what the subnet is.

ipconfig/all shows:
PPP adapter Dial-up Connection

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Dial-up Connection
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . :
   Subnet Mask . . . . . . . . . . . :
   Default Gateway . . . . . . . . . :
   NetBIOS over Tcpip. . . . . . . . : Disabled

Open in new window

Here it says "Preferred" for IPv4 address. What does "Preferred" mean?
Subnet Mask is What does that mean?

What is the subnet, and how does this act as a gateway to that subnet?
I am aware that Exchange is not to be integrated with an AD Controller.  I am also aware that installing a 2nd Windows server (2016) as a domain member with Exchange (2016) installed is the preferred method.  However, when I created the primary Win 2016 DC in a virtual environment, I was unable to add a member domain using a different NIC on the hosting Hyper-V 2016 server as, there was a LAN IP conflict using (ie... on NIC1 and on NIC4).  Windows Server 2016 on the hosting Hyper-V server will not permit two different IPs on the Same LAN using two different NICs on the hosting server.  What am I doing incorrectly?
I am trying to join the domain for readhat server to our current Windows AD. The software using realm, to be honest I am not really familiar.

I installed the software needed but still have problem to connect/register to the domain.

This is what i did (server name I changed)

RHEL 7.4 server name: stl01
AD name: K1.LOCAL
AD server:  kocdc01.k1.local

The command:
# hostname
# realm join --user=adm_narahariak@K1.LOCAL --computer-ou="OU=Linux,OU=K1 Servers,DC=m1,DC=local kocdc01.k1.local" --verbose
 * Created computer account: CN=STL01,OU=Linux,OU=K1 Servers,DC=k1,DC=local
 * Sending netlogon pings to domain controller: cldap://
 * Received NetLogon info from: KOCDC01.k1.local
 ! Couldn't set password for computer account: STL01$: Cannot contact any KDC for requested realm
adcli: joining domain k1.local failed: Couldn't set password for computer account: STL01$: Cannot contact any KDC for requested realm
 ! Failed to join the domain
realm: Couldn't join realm: Failed to join the domain

It failed. But I checked in the OU, the name STL01 has been register (after i run the realm join command). Anyone experience with this?

Thank you,
Iwan Tamimi
Does penultimate mean second to last frame in this sentence?: "all frames prior to the penultimate frame use the NAV to lock the medium for the next frame."

From: 802.11 Wireless Networks: Definitive Guide, 2nd Edition
I have a laptop which connects to a remote share over a VPN connection.   The connection was working and she was able to access the share while out of the office.    This weekend the share no longer worked and she could not get connected.    

The computer has been rebooted multiple times, the vpn connected has been terminated and restarted multiple times.    I can ping the remote server by name and IP, NSLookup returns the correct IP address and I can connect if I enter the IP address but not the server name.  

Any suggestions on why I can suddenly not map the drive by name?
Hi Experts

Could you point how to deactivate the "Aero" feature from Win7?

To gain memory on an old PC that runs as a file server I'm planning to do that.

Thanks in advance.
Can an application can choose which network adapter it wants to communicate with, and how would that be done?

I found the following on the Microsoft website:

Network List Manager
"The Network List Manager API enables applications to retrieve a list of available network connections. Applications can filter networks, based on attributes and signatures, and choose the networks best suited to their task."

Assume I have several network connections listed under "Control Panel\All Control Panel Items\Network Connections". Each network connection goes to it's own private LAN.

I would like to write a program which communicates with only one of my network adapters, instead of broadcasting my request to "The Network" in general.

And I would like another program to simultaneously communicate with only one different network adapter, and not "The Network" in general.

So I would like both network adapters to be working at the same time. But I don't want these two network adapters to be connected together -- I don't want any "networking" between these two adapters. In fact I would not like either network adapter to be connected to "The Network", because I cannot guarantee there will never be an IP Address Conflict between these two private LANs. In fact there is quite likely to be the same IP address found on each LAN. So I don't want to connect either of these network adapters together in any way.

The only three solutions I've come up with are:

Hi, please help, i am confused regarding ip address.

I have /23 address and i am assuming that i should be able to use host on /24 on it.

for example

This is my confusion, i tried to add a host

Please advice is it wrong, and if wrong what range of ip address can i include in that /23.

Thanks for your help.
As users come to work every morning, I'm noticing that on a few systems, there are duplicate IP entries in DNS with the same time stamp as system connect to the network. They can access internal network resources but have no external connection to the internet (web browsing, etc.). They are connecting to wireless AP, receive an IP, but for some reason, they receive a duplicate IP. Deleting one of the duplicates in DNS resolves the issue. I have scavenging set to remove stale resources on the hour. What am I doing wrong?

If relevant, this issue primarily happens with Apple computers connecting to the network.
CompTIA Cloud+
LVL 13
CompTIA Cloud+

The CompTIA Cloud+ Basic training course will teach you about cloud concepts and models, data storage, networking, and network infrastructure.

We have an AD user account that keeps getting locked. The event viewer log shows it from a computer named 'Workstation'. We have no Workstation in AD/DNS and I can't ping it from a few different computers on different networks. I used a tool named Account Lockout / LockoutStatus.exe that shows all the DCs in the domain. Two of them, one being the PDC, show a last bad password entry of just a few hours ago and they all show the account as locked.

Any ideas on finding out what is causing this or how to find an IP or other relevant information about the computer named 'Workstation' is appreciated.
Hi guys

There are moments when people in a particular area of the office have connectivity issues from their local PC's to the actual servers. They will say that connecting from their local machines to the server is taking a while.

I know it may not be necessary, but I would like to know if tomorrow I wanted to show people how you can measure network traffic or even connectivity problems at different points on the network, I wanted to be able to showcase it.

I was wondering whether there are ways of testing each segment of our network to see whether there are any red flags that come up. For example, how would I measure if there is a physical connectivity issue between the floor port their PC's are plugged into and the port on the switch? How about from the switch they are plugged in to, to the server? If so, then can you explain, literally, how would you go about doing this?

Thank you for helping
Need to setup a display outside the boardroom to show the room booking info.
We have an in-house Exchange Server 2010, on which there is an account "Boardroom" whose calendar is being shared in the company.
We are seeking a solution that is able to display "Boardroom" calendar outside the boardroom.
Any thoughts?
When should I use internal Active Directory DNS Conditional Forwarders vs. Stub Zones?  What are the difference?
I have a small 4 user network - 3 desktops (Windows Home Premium - Not my idea) and 2 laptop (windows 10). One of the desktops is acting as a server (basically sharing out data files). I received a call the other day regarding loss of access to the main shared folder. I assumed it was loss of power, but, there was no entry in the UPS monitoring logs. I booted the cable modem/wireless LAN router to be sure. No success.

I now believe it was due to recent Microsoft updates (I normally shut those off)  taking it upon themselves to download, install and
 reboot the system. So now 2 of the 4 machines are completely unable to share out anything.

I checked the properties of the Net adapters. I made sure they were connected to the correct network and that data sharing was enabled. I am able to ping with no problem. I disabled my AV/Firewall (Norton Internet Security) and also tried to rejoin the trusted network with their MAC addresses. One PC I attempted to restore prior to the MS updates - failed - unsuccessful. I tried re-naming the PC/work group just to shake the tree. I also created test shared folders with Everyone having full rights - same results. Nothing seems to work.

Error message while attempting to access the share:

'An error occurred while reconnecting P: to \\PC2\Public Microsoft Windows Network the handle is invalid. This connection has not been restored.

I need to restore the ability to share out files and folders.

Any suggestions?
This may be convoluted so apologies in advance. I can try to clear it up if needed.

I added a namespace to an existing set of DFS namespaces. The namespace servers (server1 and server2) have a referral status of enabled and each have a path (\\server1\dfsfolder and \\server2\dfsfolder). Everything else is configured just as the other namespaces (the previously configured DFS namespaces are not having this issue). Issue below.

If I log into server1 I can see all expected folders at \\server1\dfsfolder and \\server2\dfsfolder but if I log into server2 I only see 2 folders. More info below.

I have 12 DCs.
On 8 DCs I can go to \\server1\dfsfolder as well as \\server2\dfsfolder and see all the folders I expect to see.
On 4 DCs I can only see 2 folders when going to server1 and server2.
These 2 folders have the same name as 2 of the folders I expect to see but do not match the time stamps nor contents of the same folders (same names) seen on the other 8 DCs.

The logon / authentication server of server2 is one of the DCs is only sees 2 folders so I changed the logon / authentication DC of server 2 to a DC that is able to see all the folders but was still unable to see all of the folders after going to \\server1\dfsfolders and \\server2\dfsfolder. I am not even sure why I tried doing this. Not sure if I read something that triggered this troubleshooting step or if I just thought to try it. Either way, it didn't work.

Any ideas greatly appreciated.
In AD internal DNS I see two partitions.   It looks like the domain controller is hosting two domains.  One and another company.local
I'm not sure the reason but assume the Domain has been renamed sometime in the past.  From .local to .com
 Windows 2016 Domain controllers.

Is it safe to remove that old local DNS partition without breaking anything?  Or should I ignore it?  Would it cause any issues?
Hi guys

I have an HP network 1820-48G J9981A switch. We have a network range on this switch. It has been set with a IP. Prior to this, our network switch was completely vanilla and had no IP configurations.

Now, majority of appliances plugged into this network are on the range. However, we have 7-8 devices set to range. So now, we are completely unable to get to anything on the IP's, as the switch is currently only seeing the

My question is, what's the best way now to configure this switch? I don't want to reset it to factory default as we won't have any management. So do I set up VLAN's on all ports? How would you do it?

Or, can I set routing on the switch to say anything on network needs to be forwarded on to the gateway?

Thanks for helping
I have a group of 8 Windows 7 Pro PC's that have been peer to peer sharing files. This morning the shares all went dead. Now when I try to map the drive letter to the shared folder I get a message that says

"The mapped drive could not be created. The handle is invalid"

All users have their username and password on the sharing computer.
All users are specifically given full access on the sharing computer

Your help would be greatly appreciated.
Introduction to R
LVL 13
Introduction to R

R is considered the predominant language for data scientist and statisticians. Learn how to use R for your own data science projects.

Windows Defender Service pegged 100% CPU.  Any way to fix it?  Do I need to reboot the VM?
This is win 2016 server std edition.  Single CPU 8GB ram
We've got a few Admin shares that are being mapped automatically, how do we add/remove as needed domain wide?  We've got the following:

Joining remote server to the Domain.  What the DNS should be on the joining server?  Local or remote domain that I am trying to join?
screen shoats savign as .png file after some windwos update.

how to save as jped as earlier
please advise
i have restored a few windows guests to an isolated test environment including 2 domain controllers, a sql server and exchange.  the restore went fine but the guests are all treating the connection as public instead of domain.  i changed the category of the network connections in the registry and that worked for the 2 domain controllers (2008 R2) but it doesn't work for my 2012 R2 sql server.  I changed the values to 2, the domain is configured in the dns suffix list, and tried changing NLA service to delayed start.  it still insists it's on a public network and wont' talk to the domain controllers and causing wsus console (separate server) to not talk to sql saying it is an incorrect domain (uses sql authentication).  can ping the domain controllers but refuses to be on a domain network.
Good morning,

I'm getting the following error in the System Event log for a Windows 10 install on a new domain.  
The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
 and APPID
 to the user WWI\Administrator SID (S-1-5-21-990624160-1124455239-3479332875-500) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable). This security permission can be modified using the Component Services administrative tool.

Looking through prior EE answers, the suggestion is to go into dcom config and look at the permissions for the CLSID mentioned.  I can't find this CLSID in the list.



Windows Networking





The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.