:Connection FAQ

Question

Solution

Where is the entry point for connection? How do I choose a connection method?

• Connect to an instance

• Connection methods

• How long does it take to create an ECS instance? (Do not restart the instance when it is being initialized)

What do I do if I do not know or forget the password of an instance?

• What are the default username and password used to connect to the operating system of an ECS instance?

• Reset the logon password of an instance

Question

Solution

How do I configure security group rules?

• Configure security group rules to allow connections to a Windows instance

• Security groups for different use cases

Question

Solution

What do I do if I cannot connect to a Linux instance?

Troubleshoot Linux instance connection failures

What do I do if I cannot connect to a Linux instance by using Workbench in the ECS console?

FAQ about connecting to a Linux instance by using Workbench

What do I do if an error message appears when I connect to a Linux instance by using SSH?

• What do I do if the "Host key verification failed" error message appears when I log on to a Linux instance by using SSH?

• What do I do if the "Permission denied, please try again" error message appears when I log on to a Linux instance as the root user by using SSH?

• What do I do if the error message "No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)" appears when I connect to a Linux instance by using a third-party SSH client?

• What do I do if the "ssh_exchange_identification: read: Connection reset by peer" error message appears when I log on to a Linux instance by using SSH?

• What do I do if the "requirement "uid >= 1000" not met by user "root"" error message appears when I log on to a Linux instance by using SSH?

• What do I do if I cannot use SSH to connect to a Linux instance that has SELinux enabled?

• "main process exited, code=exited" error when SSH service is started

• The "error while loading shared libraries" error occurs when you start the SSH service

Question

Solution

What do I do if I cannot connect to a Windows instance?

What do I do if I cannot connect to a Windows instance?

What do I do if I cannot connect to a Windows instance by using Workbench in the ECS console?

FAQ about connecting to a Windows instance by using Workbench

What do I do if an error message appears when I connect to a Windows instance?

• What do I do if the error message "Because of a protocol error, this session will be disconnected. Please try connecting to the remote computer again" appears when I connect to a Windows instance by using Remote Desktop?

• An error message appears when a remote connection server crashes

• What do I do if the error message "The terminal server has exceeded the maximum number of allowed connections" appears when I connect to a Windows instance by using Remote Desktop?

• What do I do if the error message "An authentication error has occurred. The requested security package does not exist" appears when I connect to a Windows instance by using Remote Desktop?

• What do I do if the error message "there are no Remote Desktop License Server available to provide a license" appears when I connect to a Windows instance by using Remote Desktop?

• What do I do if the error message "Because of a protocol error, this session will be disconnected. Please try connecting to the remote computer again" appears when I connect to a Windows instance by using Remote Desktop?

• What do I do if the error message "Your credentials don't work" appears when I remotely log on to a Windows instance?

• What do I do if the error message "The connection was denied because the user account is not authorized for remote login" appears when I connect to a Windows instance by using Remote Desktop?

Question

Solution

Virtual Network Computing (VNC) connection

• What do I do if a black screen appears while I am connected to a VNC management terminal?

• What do I do if a VNC management terminal cannot be accessed?

• Does a VNC management terminal allow multiple users to log on simultaneously?

Browser support

• Why am I unable to use Internet Explorer 8.0 to access a VNC management terminal?

• When I use Firefox to access a VNC management terminal, an error message is returned indicating that a secure connection cannot be established. What do I do?

Question

Solution

What do I do if an exception occurs after I connect to an instance?

• What do I do if operations are slow on a Windows Server 2003 instance after I connect to the instance?

• What do I do if the error message "There is a problem with your license for Remote Desktop and the session will end in 60 minutes" appears when I connect to a Windows instance by using Remote Desktop?

• How do I view and change the default port for Remote Desktop on a Windows instance?

• How to query the remote logon information of an ECS instance

• How to limit the number of remote desktop sessions for Windows instances

• What do I do if the "Allow Remote Assistance connections to this computer" option in Remote Assistance cannot be selected for an instance that runs Windows Server 2008 or 2012?

• Remote connections to Windows Server instances and License-authorized servers

What do I do if an exception occurs when I access a website or an application?

• What do I do if I cannot access a website hosted on an instance?

• What do I do if packet loss rate and network latency are high when I access a website deployed on a Linux instance?

• What do I do if packet loss rate and network latency are high when I access a website deployed on a Windows instance?

• Use the ping command to test intermittent packet loss of the IP address of an ECS instance

• What do I do if the "534 Policy requires SSL" error message appears when I access an FTP site deployed on a Windows instance?

Question

Solution

What do I do if I cannot ping an ECS instance?

• Use MTR and analyze the MTR test results

• Troubleshoot failures in pinging the IP address of an ECS instance

• Cannot access an ENI bound to an ECS instance

• What do I do if the "general failure" error message appears when I ping the public IP address of a Windows instance?

• Troubleshoot failures in accessing services deployed on an ECS instance

Question

Solution

Which tools can I use to connect to an instance and transfer files?

Common remote connection and Data Transmission Service tools for Linux instances

What do I do if a website is inaccessible?

What do I do if I cannot access a website hosted on an instance?

What do I do if I cannot access a service deployed on an instance?

Troubleshoot failures in accessing services deployed on an ECS instance