Centos7 ssh修改默认端口号

修改ssh配置文件 /etc/ssh/sshd_config，将里面的 Port 22前面的注释去掉，将22修改为 4211

whereis ssh

ssh: /usr/bin/ssh /etc/ssh /usr/share/man/man1/ssh.1.gz

cd /etc/ssh

ll

nano sshd_config

修改iptables 防火墙：/etc/sysconfig/iptables

-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT

-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT

-A INPUT -p tcp -m state --state NEW -m tcp --dport 4211 -j ACCEPT

重启iptables

systemctl stop iptables

systemctl start iptables

systemctl status iptables

重启sshd

systemctl status sshd