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

可以从以下几个方面检查

1

vi /etc/ssh/sshd_config:
然后将这两项的注释号去掉
Port 22
Protocol 2

2

检查sshd服务

sudo service ssh status.

3

检查名字是否一致

/etc/hostname, and /etc/hosts.

4

检查防火墙.

sudo service ufw status


5

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