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Joe
Asked: 2019-06-25 18:53:58 +0800 CST

How to check and ensure SSH is accepting connections?

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I was wondering how someone would check if SSH is accepting connections.

ssh

1 Answers

  1. Best Answer

    Use the netstat command to observe what is listening on each port:

    doug@DOUG-64:~$ sudo netstat -tlnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:445             0.0.0.0:*               LISTEN      1097/smbd
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      1327/mysqld
tcp        0      0 0.0.0.0:139             0.0.0.0:*               LISTEN      1097/smbd
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1362/apache2
tcp        0      0 192.168.111.1:53        0.0.0.0:*               LISTEN      1235/named
tcp        0      0 my-external-ip:53       0.0.0.0:*               LISTEN      1235/named
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN      1235/named
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1335/sshd
tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      1545/master
tcp        0      0 127.0.0.1:953           0.0.0.0:*               LISTEN      1235/named

    Observe the Secure Shell server daemon listening on port 22.

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