VM is not accessible from the whitelisted IP Address

Question

VM is not accessible from the whitelisted IP Address

Thayumanaswamy, Naresh 0

Hi Team, I have tried to connect one vm from whitelisted IP Address but its connecting from yesterday and which was working earlier.

GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-04-25T06:52:41.0766667+00:00
Hello @Thayumanaswamy, Naresh ,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

I understand that you are trying to connect to an Azure Virtual machine from a whitelisted IP address but it's not connecting since yesterday. And this was working fine earlier.

Could you please let me know the below details:

Are you connecting to the Azure VM from the Internet or your on-premises?

Where is this IP address whitelisted?

Do you have any NSGs associated to the Azure VM NIC or it's subnet?

Regards,

Gita
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-04-26T08:11:46.82+00:00

@Thayumanaswamy, Naresh , could you please provide an update on this post?
Thayumanaswamy, Naresh 0 Reputation points

2024-04-26T09:42:46.7033333+00:00
Hi Gitarani,

Thanks for the patience,

Are you connecting to the Azure VM from the Internet or your on-premises? --->

In the AzureVM, applications are installed and its not accessible from the internet.

Have whitelisted the JumpServer & my machine IP Address in the Azure VM SSH port, but its not accessible from JumpServer and my machine.

Where is this IP address whitelisted?

Jumpserver & my machine IP Address is whitelisted in the SSH port 22 in the VM network settings.

Do you have any NSGs associated to the Azure VM NIC or it's subnet?

Not sure about that
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-04-30T16:26:32.6+00:00

@Thayumanaswamy, Naresh , could you please provide an update on this post?
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-05-02T14:42:19.69+00:00

@Thayumanaswamy, Naresh , do you have any updates on this issue?

1 answer

Your answer

GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-04-25T06:52:41.0766667+00:00

Hello @Thayumanaswamy, Naresh ,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

I understand that you are trying to connect to an Azure Virtual machine from a whitelisted IP address but it's not connecting since yesterday. And this was working fine earlier.

Could you please let me know the below details:

Are you connecting to the Azure VM from the Internet or your on-premises?

Where is this IP address whitelisted?

Do you have any NSGs associated to the Azure VM NIC or it's subnet?

Regards,

Gita
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-04-26T08:11:46.82+00:00

@Thayumanaswamy, Naresh , could you please provide an update on this post?
Thayumanaswamy, Naresh 0 Reputation points

2024-04-26T09:42:46.7033333+00:00

Hi Gitarani,

Thanks for the patience,

Are you connecting to the Azure VM from the Internet or your on-premises? --->

In the AzureVM, applications are installed and its not accessible from the internet.

Have whitelisted the JumpServer & my machine IP Address in the Azure VM SSH port, but its not accessible from JumpServer and my machine.

Where is this IP address whitelisted?

Jumpserver & my machine IP Address is whitelisted in the SSH port 22 in the VM network settings.

Do you have any NSGs associated to the Azure VM NIC or it's subnet?

Not sure about that
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-04-30T16:26:32.6+00:00

@Thayumanaswamy, Naresh , could you please provide an update on this post?
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2024-05-02T14:42:19.69+00:00

@Thayumanaswamy, Naresh , do you have any updates on this issue?

Answer 1

Hello @Thayumanaswamy, Naresh ,

I understand that you are trying to connect to an Azure Virtual machine from a whitelisted IP address but it's not connecting since yesterday. And this was working fine earlier.

To connect to an Azure VM from Internet, you would need to allow the access from the NSG (Network Security Group) which can either be associated to the VM's NIC or the VM's subnet.

Network security group is used to filter inbound and outbound network traffic to and from Azure resources in an Azure virtual network.

Network security groups contain security rules that filter network traffic by IP address, port, and protocol. When a network security group is associated with a subnet, security rules are applied to resources deployed in that subnet.

Refer the below document which describes how to connect, via SSH, to a VM that has a public IP and also shows the exact NSG rule that you need to add:

https://learn.microsoft.com/en-us/azure/virtual-machines/linux-vm-connect?tabs=Linux

To learn more about NSG (Network Security Group), you can refer the below documents:

https://learn.microsoft.com/en-us/azure/virtual-network/network-security-groups-overview

https://learn.microsoft.com/en-us/azure/virtual-network/network-security-group-how-it-works

Additional troubleshooting documents that you may refer:

https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-troubleshoot-connectivity-problem-between-vms

https://learn.microsoft.com/en-us/azure/virtual-network/troubleshoot-vm-connectivity

SSH related troubleshooting documents:

https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/linux/detailed-troubleshoot-ssh-connection

https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/linux/troubleshoot-ssh-connection

Kindly let us know if the above helps or you need further assistance on this issue.

Please "Accept the answer" if the information helped you. This will help us and others in the community as well.