If these are not present in the server, probably it is using iptables. With CentOS7, it is firewalld, whereas, with Ubuntu, it is ufw. One of the common causes of SSH connectivity is firewall blocking and firewall applications differ between various OS being used in the server. Verify that the server firewall rules allow SSH access.īasic solutions to troubleshoot SSH connectivity Make sure that the IP address of the server is correct.Ĭonfirm that your network allows SSH connection. To correct this error, use the following steps. The resolution steps for connection failure are like those of connection timeout. Ssh: connect to host 123.123.123.123 port 22: connection refused In this case, you may see the below errors: Error output A connection failure occurs when your SSH request reaches the SSH port but the server refuses to accept it. Verify that the firewall rules on your VPS are not at fault.Ĭonnection failure and timeout are both different. Make sure that the server IP address is correctly typed in.Ĭonfirm that your network allows SSH port connectivity. To correct this error, follow the below steps. Ssh: connect to host 123.123.123.123 port 22: connection timed out The common error messages in such cases are as below: Error output This error shows up when a user tries to connect to a server, but the server refuses to establish the connection within a specified timeout period. If the hostname is not resolving properly, you can use the public IP address for SSH as below, where the user is the SSH username that you use and 123.123.123.123 is the server IP. To resolve such errors, you may follow the steps below: Unable to open a connection to Host does not existĪ hostname error may occur when a host fails to connect to SSH using a specific network address. Ssh: Could not resolve hostname: Name or service not known You may get errors like the below ones when trying to access through SSH: Remote Host Identification Has Changed Your server is working correctly through the Console in the LayerPanel as follows. There are no SSH access restriction rules set on the firewall level in the LayerPanel & server-side. In some cases, the server cannot be accessed via SSH or the SSH service becomes refused the connection which needs to be further investigated.īefore proceeding with SSH troubleshooting, you need to make sure that: The SSH (Secure Shell or Secure Socket Shell) is a service that provides a secure way for users and system administrators to access a server over an insecure network.
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