

A separate component running in your VM in the path between the test VM and your VM, such as a load balancer or firewall, is allowing the traffic.Cloud Services endpoints or Network Security Groups are allowing the traffic:.
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On both Windows and Linux-based virtual machines, use the netstat -a command to show the active listening ports.

Use the local host name, the local IP address, or the loopback address (127.0.0.1).įor example, if the application is a web server, open a browser on the VM and try to access a web page hosted on the VM. Try to access the application with the appropriate client program from the VM on which it is running. Step 1: Access application from target VM To determine the source of the problem and its correction, follow these steps.

Are firewall rules in place preventing traffic from flowing correctly?įor client computers that are accessing the application over a site-to-site VPN or ExpressRoute connection, the main areas that can cause problems are the application and the Azure virtual machine.Can traffic flow from users to the VM/application on the expected ports?.Network Security Groups and inbound NAT rules for virtual machines in Resource Manager deployment model.Cloud service endpoints for virtual machines in the Classic deployment model.Is the VM itself running correctly and responding to requests?.Is the application itself running correctly?.The application running on the Azure virtual machine.There are four main areas to troubleshoot the access of an application that is running on an Azure virtual machine. Connect from different location, such as a different Azure virtual networkįor more information, see Troubleshooting Endpoint Connectivity (RDP/SSH/HTTP, etc.Classic model - Manage Cloud Services endpoints.Resource Manager model - Manage Network Security Groups.Recreate the endpoint / firewall rules / network security group (NSG) rules.After each step, try connecting to your application again: If you have problems connecting to an application, try the following general troubleshooting steps. Go to the Azure support site and select Get Support. Alternatively, you can also file an Azure support incident. If you need more help at any point in this article, you can contact the Azure experts on the MSDN Azure and the Stack Overflow forums. Troubleshoot Secure Shell (SSH) connections to a Linux-based Azure virtual machine.Troubleshoot Remote Desktop connections to a Windows-based Azure Virtual Machine.If you are having issues connecting to your VM using RDP or SSH, see one of the following articles first: This article describes a methodical approach to find and correct the problem. Reasons include the application not running or listening on the expected ports, the listening port blocked, or networking rules not correctly passing traffic to the application. There are various reasons when you cannot start or connect to an application running on an Azure virtual machine (VM).
