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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.

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I need help with Hyper-V VMM. Started out just using Hyper-V Manager only but now trying to wrap my head around Virtual Machine Manager (VMM).

1. If I have a VLAN set on a VM in Hyper-V Manager, is it possible for me to change the VM's VLAN through VMM? Reason I ask is I did change the VLAN on the VMM side but it is still the same on the VM when I look at it in Hyper-V. VM also asks like it is in the same VLAN.

VMM Side

2. Anyone have any good resource on how to set-up being able to use VLANs in Hyper-V in the simplest way.
Become a CompTIA Certified Healthcare IT Tech
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Become a CompTIA Certified Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

What's the best way to populate user's mobile phone numbers into the Active Directory under Telephones tab.   Is it something I can do with powershell from CSV file?
Please advice.  Thanks!

I may have a stupid question but, I have ip address for proxies and I want to find open ports for it. Can you help me find online tools for this?

Thank you!

How to know if there are any shared folders in a directory?


->Subfolder 1
Subfolder 1.1
which is shared
->Subfolder 2
Subfolder 2.1
which is also shared

I want a list which shows me the subfolder 1.1 and subfolder 2.1 and every share in other subfolders if they exist.

Thank you in advance!
Dear Experts

We are using offfice 365 SMTP relay to send mails to the external users through the CRM application, i,e option 3 on the following URL
https://support.office.com/en-us/article/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-365-69f58e99-c550-4274-ad18-c805d654b4c4 , this CRM system is allowed only to talk with <domain>.mail.protection.outlook.com on port 25 and 587 and rest of the access to the internet is blocked, not access for this CRM system to http/https to the external network.
1. we observed the CRM system workflow triggers the emails to the external network users only when the port 80 is opened for the CRM system at the gateway/firewall level,  we noticed the CRM system gets connected to internet and connects to crl.globalsign.com  and from here it is connecting to office365 smtp and emails are delivered.
2. when we disable access to external network i,e port 80 http blocked for CRM system at gateway/firewall then emails does not flow no packets flow found hence no mails are sent.
3. When only allowed CRM system can talk to crl.globalsign.com  then emails are getting triggered.
can you please help me understand how this office365 is working when it is configured to the CRM system. is it essential that CRM system to be allowed to talk to crl.globalsign.com . please suggest.
Dear Experts

CRM system work flow triggers emails to the prospect email account as and when the prospect statues changes via the SMTP server ( without password that is without authentication as it is Relay server hosted locally-office 365 mail protection ). We could see the connection to the email server getting established but no packets sent/received , but through telnet we can send and receive mails by making use of from and to email commands through the telnet session, can you help where the things are going wrong. following SL2 cases it works but SL3 it does not work.
1. though telnet to the smtp server with FROM and TO commands it works that is mail is delivered to the TO addressed account.
2. though CRM system configure email settings with email account, smtp and port without the SMTP authentication mail is getting delivered to the To account.
3. CRM system through workflow trigger email on each status changes mail is not getting delivered instead we can see connection is ESTABLISHED to the smtp server
Hello, All;

Virtual Machine
Windows 2016 Server
Windows DNS
Belkin Router

OK, the other day my port 53 became unavailable, I did not find out about it, until last night.
All my other ports are reachable, but port 53 is NOT.
I have it opened in my Router, and I can telnet 53 on the VM Server itself.

The servers have been running fine for several months.
Can someone please let me know what I need to check, as this has all my sites down as well as the Mail Server.

I need to provide a summary if there is any risk in the following 'practice'. We have a number of users who leave there desktop PC's running overnight in an office environment. They are always locked, but seem to be too lazy to actually shut the device down for some reason. The high level of management are aware of this but seem of the opinion 'so what'. I am not sure there any real obvious security issues so long as its been locked, except perhaps disclosing the officers logon name., I'm hoping there are some other issues which have perhaps been overlooked that can build our case to issue disciplinary action against staff for doing this kind of sloppy behavior.
Dear Experts

We have the application server ( CRM system web-based ) running on windows 2012 R2 which is deployed on premises behind the firewall. we have to configure CRM application to send mails to the customers through office365 email account hence network team has provided access only to smtp.office365.com and on port 587 and denied rest of the outbound or inbound access i,e no http or https access to this system.  
1. The CRM application is not able to send mails when the http/https is disabled for this system.   Through the CRM workflows we are able to send the mails out only when the http and https is allowed to this system at firewall .
2.  we are not able to convince the network team as they say we allowed outbound smtp.office365.com and 587 the issue would be at application side, they are asking explanation on why http/ https required,
can you please help me to understand on what all ports or access to be enabled at firewall for this system/server in additional to smtp.office365.com and port 587 in case of  INBOUND and OUTBOUND so that we can communicate to the network team please.
Dear experts, DHCP on Cisco core switch vs on Windows server 2012, which one is better? Can you please suggest pros and cons? We have 500 users, 2000 IP addresses and 20 subnets. Many thanks!
Exploring SQL Server 2016: Fundamentals
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Exploring SQL Server 2016: Fundamentals

Learn the fundamentals of Microsoft SQL Server, a relational database management system that stores and retrieves data when requested by other software applications.

I have a Workgroup of about 9 computers. One of the Windows 10 desktops serves as a share for 2 spreadsheets. Everyone can access the share except one PC gets "Network error: Cannot access \\OHDSales, Error code 0x80070035, The network path was not found." The "server" and the "client" are both Windows 10 Pro. The client could not see any PCs on the network via Windows Explorer until I enabled SMB\CIFS1.0 under control panel >> Programs Features >> Add/Remove Windows Features. Now it can see all the network PCs (AND WILL EVEN GET PROMPTED FOR CREDENTIALS WHEN CLICKING ON AAANNNYYY OF THEM! BUT PROMPTS ONLY THE ABOVE STATED ERROR IF TRYING TO ACCESS THE SHARE ON THE "SERVER.)

I can ping the "server" IP. But can't access the share via Windows Explorer using \\hostname or \\IPAddress.
Dear Experts

In windows server where the application server (CRM system)  is deployed this application which connects to multiple integrations like website , CTI, also configured office 365 smtp, the application logs are not giving us enough data hence from the windows server level how to find or get the log report , when the CRM application runs logic based on scheduler it triggers emails to the customers to check this from windows server level what to do please suggest, in linux think we can use netstat - tulnp, In windows server how to find the application which is running is it establishing connection to the remote services like smtp configured. for example
1.  would like to run the command where it lists  only the running smtp connections established
2. would like to run the command where it lists all the connections established to web server.
also is it possible to append to text file
Dear experts, how can we collect users' activities on web browsers? Assuming that this is domain environment and we prefer free solution, script or Gpo settings. Many thanks!
I have a question regarding DFS

Current situation:
Our primary DC hosts the DFS. When the primary DC goes offline. The DFS namespace is not accessible.

If the primary DC goes offline, the DFS namespace should be accessible. I do not want to replicate the files to another server. My only goal is that the namespace is working.

Does some of you guys know how to achieve that?

Thank you in advance!
Dear Experts
We are having issue on CRM system not able to send mails through the configured SMTP server but the network team says the issue is from CRM application side however to come to the correct conclusion,
Used Telnet to test SMTP
1.On the CRM hosted Windows OS system did the telnet check with smtp host and port , it connects also performed following steps I,e setting smtp server , source domain, senders email and recipient email, message subject and body we are able to send and receive email
Please let me know the above steps does it passes through SMTP authentication OR not
2. configured email account in the CRM system with SMTP mail server.port: (SMTP server is smtp.office365.com)
check marked "use SMTP Authentication". provided user name and password  the result  is not able to send mail following popup from the CRM system
"Error Failed to connect to outbound SMTP Mail Server. The outbound mail server selected for the mail account you are using is invalid check the settings OR select different mail server" BUT when unchecked the "Use SMTP Authentication" that is disabled the SMTP Authentication then able to send mail out..
As mentioned above SL1 when able to send and receive email from telnet does it passed though the authentication , please help.
I'm looking for installation/setup manual as well as driver for
VONETS VAR11N-300;  refer to link below:

Saw somewhere that in a hotel room's wired LAN port (RJ45), just have to
plug this device into the LAN port & power it up & we'll get a Wifi SSID
in the hotel room?   Is this so?

If it serves as AP-client as in Q2, I suppose we won't need a driver, right?
if so, can I plug it into my laptop's LAN port & the laptop will become
accessible or the laptop will act as a router??
I guys ,

I got a Cisco 547w router. Which does have a adsl connection.
For some reason. When I enter my wan ip in browser, it connects to my router page.
Is there any option to disable it ? I don’t need to access it with my wan ip. And it happens only inside the internal network.

From external it doesn’t work that way, because remote management is disabled. But for some reason when am inside the network I can access it with both private and public up.

Can u guys help how to disable the access through public ip?

Thank you
Using Microsoft VPN server\client on Server 2012. The 2012 server is in the cloud, I have set up the VPN server and I'm able to connect to the VPN, I can ping the VPN server, I can RDP to the server when connected to the VPN but I can not access a share on the server. This is a single server (non-domain) solution that remote clients need to access a database on this server. Port 139 is open, The VPN clients get an IP address on the same subnet as the server. when trying to access the share via IP \\999.999.99.99\share  I get Windows cannot access never prompts for user id. I have checked share and NTFS rights and the VPN users should have access. I get same results on Win10 VPN client and Win 7 VPN client
I have an interesting problem.  From my domain server I am UNABLE to ping one of our clients.  But from the client computer I am able to ping the domain server.  How is it possible that its a one way ping success but not from the other way.  What could be the issues.  I am pinging using the IP address only.  This is a Windows network and the client computer is Windows 10.  I am almost 100% positive that the client is the problem.
Exploring ASP.NET Core: Fundamentals
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Exploring ASP.NET Core: Fundamentals

Learn to build web apps and services, IoT apps, and mobile backends by covering the fundamentals of ASP.NET Core and  exploring the core foundations for app libraries.

While I am connected to my organization's internal network using the Always on VPN connection (while outside of the office) I am able to successfully browse network shares on the Hyper-V base server and virtual servers using the \\hostname\C$ convention but can't browse these same network shares using the  \\internal IP address\C$ convention.

The internal IP address scheme used by my organization is uniqute and isn't widely used amoung other networks, 10.88.188.x (or by the networks I am connected to while establishing the Always On VPN connection).

I am also able to successfully browse these same C$ network shares while within my organization's internal network and connected using Wi-Fi or an Ethernet cable.

What can I do to fix this issue so I will be able to connect to and browse my organization's server's C$ shares using their IP addresses while outside of the office and connected to my organization's internal network using the Always On VPN connection?
While connecting to my organization's Always on VPN using my Windows 10 computer I am prompted to choose between two certificates.

I know which certificate to choose and which one won't work.

How can I remove the wrong certificate so that I will no longer be prompted to choose a certificate while connecting to my organization's Always on VPN?
I am having a problem accessing a remote share, from a windows 10 enterprise system, to a share that resides on a server 2016 machine.  Interestingly enough, I set up another 2016 system which I can access from the same windows 10 machine with no issue.  The system is currently not domain connected and I have tried accessing the hidden share on the d:\ drive of the remote 2016 machine.  I have also shared the drive out to the "Everyone" group with full permissions and I still cannot connect.

From the remote machine, I enter into a windows explorer window \\servername\share, but I never get prompted for a username/password.  Instead I get a window popup stating "Windows cannot access \\servername\share".  The error code is 0x80004005.  

In the event log, on the 2016 server, I am seeing an audit failure, in the Security log, stating "The user has not been granted the requested logon type at this machine"

On the second server, that I installed server 2016 on, I have no problem accessing the share, whether it's the hidden share or the share I set up to Everyone.  

I don't understand why I'm not being prompted to enter my credentials on my Windows 10 machine.  I have also confirmed with others, in my group and they too cannot access any of the shares on the problem 2016 server.

I have looked everywhere under the sun, but cannot find a resolution to this issue.  

Any help is appreciated.
Dear Experts

We have hosted CRM application  on-premises which is web-based and every user has email settings to be configured, the email server is on internet and also other integration like SMS(sms service provider is on external network) and third party applications, all these were perfectly working until the recent changes at the gateway level and internal IT policy,  I suggested them may be the crm servers are not allowed to talk to the external network of email server and sms service providers,.
please find the attached error logs captured, and these the crm server is of windows server 2012R2 can you please help on how to test and confirm to them based on test result like the issue of connectivity, is it recommend to telnet from the web-application crm windows server to the destination email server/sms sever provider server with the ports -- is this the right way OR any other way to check and ensure the necessary ports and access at the gate way/firewall is opened or not, please suggest.
This is likely networking 101, but.... I'm stuck.

SBS 2011 server at location A ( subnet)
Location B is connected to location A with VPN, subnet  The router at location B currently gives out public DNS IP addresses

What's the right way to set things up for domain added laptops running win 10 pro at location B to be able to access shares on the server like \\serer\files?  The server is the domain controller.  There's only that 1 server.

Use a Hosts file?  It has that now with entries:

server.domainname.local (is this needed?)

When they click on a mapped drive, a windows security box pops up asking for credentials, and even though we check 'remember my credentials', it asks again after a reboot.  This window ALSO says 'the system cannot contact a doimain controller to service the authentication request.  Please try again later.

You click OK after adding credentials, get to the files and all is fine.  till a reboot.

What do I need to do so it can get to the domain controller across the VPN?

Why doesn't it save the credentials after a reboot?

Why does it even ask for the credentials - the user and password entered when logging in are the credentials.

When I got here, I believe the XP Service Pack 3 PC connected fine to their Win10 Pro PC, which they use as their "server" to share files.  Now I have replaced the Win10 PC with a newer one--and now I can't connect their XP PC to it.  I can successfully ping from XP to Win10 PCs, but when I try "Net Use F: \\Whse\F-Drive" like all the other PCs on the LAN use, I get:

"System error 64 has occurred.  The specified network name is no longer available."

I have tried many things that do NOT work--including similar questions on e-e--but I'm hoping someone here will know what WILL work to solve the problem.  TIA

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.