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OCI: SSH to Instance Failed at "Connection refused"

edited Aug 9, 2022 4:44PM in Linux

Applies to: 

Oracle Cloud Infrastructure

Linux x86_64

SYMPTOMS

When ssh to an instance, it fails with "Connection refused" as follows:

OpenSSH_7.1p2, OpenSSL 1.0.1g 7 Apr 2014
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to ****.****.****.**** [****.****.****.****] port 22.
debug1: connect to address ****.****.****.**** port 22: Connection refused
ssh: connect to host ****.****.****.**** port 22: Connection refused

CAUSE

There are many reasons for the error like sshd service is not running or sshd wrong configuration or sshd permission issue etc, 

so you have to check them step by step. 

Solution

  • Make sure ssh is allowed in the security list:

https://docs.cloud.oracle.com/iaas/Content/Network/Concepts/securitylists.htm?Highlight=security%20l

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