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JamesN-7426 avatar image
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JamesN-7426 asked JamesN-7426 edited

DC cannot ping its client computer by Hostname but it can ping by IP address

I have limited experience with Windows server and Domain controller, so thank you for being patient with me.
I search on this forum but not quite find the correct answer to my case either. Here is my sitution:

1/ Windows Server 2019 Std version, running Domain controller and DNS server name DC-01 in the Office on 192.168.100.0/24 network
2/ A desktop (name DSKT-01) running Windows 10 Pro at Home-Office on 10.10.100.0/24 network
3/ The Office and Home is Site-to-Site VPNed.
4/ The DSKT-01 joined the DC-01 all good.

Few days ago, I needed to reinstall the Desktop, then name it the same as previously (DSKT-01). But somehow it has lost the connection to DC-01. I then removed the "previous" DKST-01 computer from DC-01 Active Directory; Created the new computer and name it the same DSKT-01. Then from the DSKT-01, I can rejoined the DC-01 successfully.

However, from the DC-01, I can't ping the Desktop using its hostname as DKST-01 (was OK before the reinstallation). I can however, ping the DSKT-01 by its IP address. Everything else works except pinging the name. It said host (DSKT-01) cannot be found.

A/ What I have done:

A.1/ Delete the dns cache (ipconfig /flushdns) from both DC-01 and DSKT-01
A.2/ Update policy (gpupdate /force) on both machines
A.3/ Delete the contain of host file on DC-01 and DSKT-01


B/ Other notes:

B.1/ When I checked in the DNS server, in the Forward lookup zone, there is a record of the DSKT-01's IP address which is automatically created when joining the DKST-01 to the DC-01. But still, I cannot ping the client PC by its hostname. This bug me the most, especially it was working previously and after the reinstall, it stops

B.2/ DC-01 can ping other client computers in the same network using their Hostname.

B.3 / Other client computers in the same network with the DC-01 can ping the DSKT-01 by it hostname.


Why the DC-01 cannot ping its client "DSKT-01" by its hostname?

Anyone have any idea what I may be missing?

Thank you very much

windows-serverwindows-active-directory
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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

Windows Server 2019 (AD and DNS) is installed on bare-metal server. Then, we installed Hyper-V

This isn't going to work. I'd suggest standing up a dedicated virtual machine for active directory domain services, migrate roles over, then demote host to member server.

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@DSPatrick:
Do we need to purchase another Windows Server licence to setup the Domain service on the Virtual machine?

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Some general info
- Each host needs to be licensed.
- A minimum of 8 core licenses is required for each physical processor and a minimum of 16 core licenses is required for each server.
- Core licenses are sold in packs of two.
- Standard Edition provides rights for up to 2 Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed. For each additional 1 or 2 VMs, all the physical cores in the server must be licensed again.
- DataCenter Edition provides rights for unlimited Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed.
https://download.microsoft.com/download/7/C/E/7CED6910-C7B2-4196-8C55-208EE0B427E2/Windows_Server_2019_licensing_datasheet_EN_US.pdf

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@DSPatrick:
Thank you for your information.

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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

Just checking if there's any progress or updates?

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@DSPatrick:
Since we are under budget constrained, getting another Server licence is not possible at this time
We would try to remove/rejoin the client again to see if it works
But thank you for your suggestions for our future expansion

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Regardless a multi-home domain controller will always be unstable and problematic in this state.

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