ssh: connect to host IPADDR port 22: Connection timed out on ubuntu

可以從以下幾個方面檢查

1 vi /etc/ssh/sshd_config:
然後將這兩項的注釋號去掉
Port 22
Protocol 2

2

檢查sshd服務

sudo service ssh status.

3

檢查名字是否一致

/etc/hostname, and /etc/hosts.

4

檢查防火牆.

sudo service ufw status

5

查看tcp連接埠22
zhaoxiaowei@beigang:~$ netstat -nat | grep :22
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN     
tcp        0     52 IPADDR.197 :22        221.123.129.155:54465   ESTABLISHED
tcp        0      0 IPADDR.197 :22        221.123.129.155:1259    ESTABLISHED
tcp        0      0 IPADDR.197:22        192.126.120.8:54340     ESTABLISHED
tcp        0      0 IPADDR .61.197:22        221.123.129.155:54109   ESTABLISHED
tcp        0      0 IPADDR .61.197:22        221.123.129.155:53899   ESTABLISHED
tcp6       0      0 :::22                   :::*                  

  LISTEN

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blog.csdn.net/beiigang