RDP into VMSS

James Mikolajczyk 10

Having gone through multiple guides I cannot figure out how TO RDP into a VMSS.I already followed this guide and still can't connect.

https://learn.microsoft.com/en-us/answers/questions/65233/vmss-scaleset-instance-rdp-is-not-working

Wagner Silva 0 Reputation points Microsoft Employee

2024-10-31T17:56:30.7733333+00:00

It sounds like you’re having trouble connecting to your VMSS instance via RDP even after following the guide. One common issue is the Network Security Group (NSG) configuration. The default Load Balancer (LB) for VMSS has changed from Basic to Standard, which requires explicit NSG rules to allow RDP connections. Make sure that your NSG has rules to open the RDP port (usually 3389) at the subnet level.

Here are some steps you can follow:

Check NSG Rules: Ensure that the NSG associated with your VMSS allows inbound traffic on port 3389.

Update NSG: If necessary, update the NSG to include a rule for RDP.

Apply NSG to VMSS: After updating the NSG, apply the latest VMSS model to each VM in the scale set
Wagner Silva 0 Reputation points Microsoft Employee

2024-10-31T18:00:57.6866667+00:00

It sounds like you’re having trouble connecting to your VMSS instance via RDP even after following the guide. One common issue is the Network Security Group (NSG) configuration. The default Load Balancer (LB) for VMSS has changed from Basic to Standard, which requires explicit NSG rules to allow RDP connections. Make sure that your NSG has rules to open the RDP port (usually 3389) at the subnet level.

Here are some steps you can follow:

Check NSG Rules: Ensure that the NSG associated with your VMSS allows inbound traffic on port 3389.

Update NSG: If necessary, update the NSG to include a rule for RDP.

Apply NSG to VMSS: After updating the NSG, apply the latest VMSS model to each VM in the scale set
Prrudram-MSFT 27,251 Reputation points

2024-11-05T05:57:39.09+00:00

Hi @James Mikolajczyk

I'm sorry to hear that you're having trouble connecting to your VMSS instance.
Check the networking settings for the VMSS instance you are trying to connect like NSGs and IPaddress.
James Mikolajczyk 10 Reputation points

2024-11-05T09:35:59.9433333+00:00

"Ensure that the NSG associated with your VMSS allows inbound traffic on port 3389."

My Source IP range was incorrect. Changed it to MyIpAddress and all is working now. Thanks for all your help.

1 answer

Prrudram-MSFT 27,251 Reputation points

2024-11-08T09:01:53.4433333+00:00

Hi @James Mikolajczyk

I am glad to know that you were able to identity the exact cause and solution. I am reposting this as answer for other users to navigate to this solution better. As an original poster on this thread only you have the option to mark this resolution as answer

Issue Description: Unable to RDP to VMSS instance

Cause: Source IP range was incorrect. James Mikolajczyk has confirmed that the change the source IP address range it to MyIpAddress and all is working now.

Please go ahead and mark this as an accept answer for the benefit of the community
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RDP into VMSS

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