用SSH登陆,系统提示:connection refused

本文介绍了当尝试通过SSH连接到Linux服务器时遇到connection refused错误的常见原因及解决方法,包括检查SSH服务状态、端口监听情况、登录权限设置、防火墙配置以及SSH配置文件。

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今天一早,使用putty连接linux,一直报:

用SSH登陆,系统提示:connection refused

 

原来是我sshd服务没开。

 

在服务器没有启动ssh服务。

 

如果大家也遇到这个情况,可以按照以下的步骤处理:

 

1、服务是否启动,是否在侦听22端口;
2、是否允许root登录;
3、本机是否安装了防火墙;
4、查查ssh的配置文件

 

 

 

进步并快乐着!

### Ubuntu SSH Connection Refused Network Error Solution When encountering an issue where SSH connections are being refused on an Ubuntu system, several potential causes and solutions can be explored. A common reason for this problem is that the OpenSSH server might not be installed or could have stopped functioning properly. To verify whether the SSH service is active, one should check its status using `systemctl`: ```bash sudo systemctl status ssh ``` If the service appears inactive, restarting it may resolve connectivity issues[^1]: ```bash sudo systemctl restart ssh ``` Another critical aspect involves ensuring firewall settings do not block incoming SSH requests. By default, UFW (Uncomplicated Firewall), which comes pre-installed with many Linux distributions including Ubuntu, blocks all inbound traffic unless explicitly allowed. To permit SSH access through port 22, execute these commands: ```bash sudo ufw allow ssh sudo ufw reload ``` Additionally, verifying configuration files within `/etc/ssh/sshd_config` ensures no misconfigurations exist preventing proper operation of the SSH daemon. Common adjustments include setting `PermitRootLogin`, adjusting `PasswordAuthentication`, and confirming correct listening addresses under `ListenAddress`. Lastly, examining logs located at `/var/log/auth.log` provides insight into any authentication failures or other errors related to attempted SSH sessions. This diagnostic step helps pinpoint specific reasons behind denied connections.
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