Ssh session timeout putty3/1/2024 ![]() For more information, see Using effective routes to troubleshoot VM traffic flow. You can also review effective routes to see all effective routes for a network interface. Use Network Watcher's Next hop capability to confirm that a route isn't preventing traffic from being routed to or from a virtual machine. For more information, see Using effective security rules to troubleshoot VM traffic flow. You can also review effective security group rules to ensure inbound "Allow" NSG rule exists and is prioritized for SSH port (default 22). Use IP flow verify to confirm if a rule in a network security group is blocking traffic to or from a virtual machine. Enter a new username and associated password or SSH key, and then select Update. You can also create a user with sudo privileges on the VM from this menu. Specify the username and an SSH key or new password, then select Update. ![]() To reset the credentials of an existing user, select either Reset SSH public key or Reset password in the Mode section as in the preceding screenshot. Once this action has completed, try to access your VM again. To reset the SSH configuration, select Reset configuration only in the Mode section as in the preceding screenshot, then select Update. Scroll down to the Help section and select Reset password as in the following example: To begin, select your VM in the Azure portal. The Azure portal provides a quick way to reset the SSH configuration or user credentials without installing any tools on your local computer. If you still cannot connect, try the next step. Azure VMAccessForLinux extension - create and reuse json definition files to reset the SSH configuration or user credentials.Īfter each troubleshooting step, try connecting to your VM again.If you are working with a classic VM, you can use the Azure classic CLI. ![]() Azure CLI - if you are already on the command line, quickly reset the SSH configuration or credentials.The output will be returned to the portal. Use Run Command through Azure portal - You can run basic commands by using the Run Command functionality through the Azure portal.In fact, "can't SSH" situations are specifically what the serial console was designed to help solve. Azure VM Serial Console - the VM serial console will work regardless of the SSH configuration, and will provide you with an interactive console to your VM.Azure portal - great if you need to quickly reset the SSH configuration or SSH key and you don't have the Azure tools installed.You can reset credentials, SSH configuration, or troubleshoot the status of the SSH service by using one of the following methods: Available methods to troubleshoot SSH connection issues If you have boot diagnostics enabled, verify the VM is not reporting boot errors in the logs.Ĭontinue reading for more detailed troubleshooting steps and explanations.Ensure that the VM reports as being healthy.For more information, see Configure role assignments for the VM that uses Microsoft Entra login. Otherwise, the "Permission denied (publickey)" error will be received. If you are using Microsoft Entra ID to manage SSH logins, the user must be assigned the Virtual Machine Administrator Login or Virtual Machine User Login role on the resource group that contains the VM and its associated resources.You cannot use port redirection / mapping without using an Azure load balancer.Ensure that a Network Security Group rule exists to permit SSH traffic (by default, TCP port 22).Verify the network security group rules permit SSH traffic and role assignment. ![]() Quick troubleshooting stepsĪfter each troubleshooting step, try reconnecting to the VM. Please use the Feedback button on this page to let us know how well this article worked for you or how we can improve it. Was this article helpful? Your input is important to us. ![]()
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