Windows 10: Server blocks computer IP from accessing it?

Hi guys,
I posted about this issue a long time ago, I thought it was fixed, but I guess not...
The issue was with LTSB 2016 and Server 2016, but now it is happening also with LTSC 2019 and Server 2019.

I have a few servers (all of them 2019), RP, print etc...
Sometimes a server (randomly) decides to block a computer from accessing it until I change the computers IP, or wait about 45min...

Sometimes I'm in a remote to 1 of the servers, and just out of the blue I get disconnected from the session

Example:
My print server is deploying the printers with GPO, I installed a new computer, joined it to my domain, did gpupdate but it did not get the printers, I can ping the server, but I can't access it via \\print-server to show all the printers, but as soon as I changed IP, and re-gpupdate, I get the printers.

Yes, I tried turning off the firewall and AV

Anyone else having/had this issue?
Can anyone help?

Thanks

:)

 

IP accessing

How could a program on your computer block anything from accessing your router anyway?
The router itself has to block things, I'd suggest using simple NAT and forwarding ports you need, the rest will be blocked.

 

IP accessing

I have a program hat i use to block certain ip address from accessing my router/switch and computer...but i was looking and it seems that there is always a person trying to access the computer whether i have a program up or not i can be do nothing and there is an ip adress trying to access the computer. Why is this. I know that the computer is tries to send out data but it shows ips coming in are these response from me sending out the data???

 

"Server connectivity = blocked" on Xbox app on Windows 10

Hi MoonBunny17,

If your server connectivity is "Blocked", it means that your computer was unable to establish a Teredo IPsec connection to the Quality of Service (QoS) server. Since you've tried the troubleshooting steps from our support page, let's try to restart the "IP
Helper" and "Xbox Networking Service" by performing the following steps below:

1. Press the Windows Key + R to open the Run box.
2. Type "services" and hit enter to open the Services Window
3. Scroll down until you find an entry called “IP Helper”. Right-click on it, and then click Restart.
4. Scroll all the way down to the bottom and do the same thing for “Xbox Live Networking Service”.
5. Close the window, open the Xbox app and check your connection again.

If the issue persists, I recommend that you try connecting your computer to another network to see if that will change the server connectivity on the Xbox app.

Keep us updated with the results after performing the suggested solutions above.