linux修改默认ssh端口

vim /etc/ssh/sshd_config

没安装vim则用

vi /etc/ssh/sshd_config

在#Port 22行去掉#号注释，同时加入想要使用的端口号如 Port 61228

# If you want to change the port on a SELinux system, you have to tell
# SELinux about this change.
# semanage port -a -t ssh_port_t -p tcp #PORTNUMBER
#
Port 22
Port 61228
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

保留22端口是为了防止当前无法使用ssh登录

ecs退出编辑
:wq
回车保存

重启ssh

systemctl restart sshd.service

ssh使用新端口登录，登录成功则下一步

关闭22端口

vi /etc/ssh/sshd_config

将之前开放的Port 22一行注释掉并保存

# If you want to change the port on a SELinux system, you have to tell
# SELinux about this change.
# semanage port -a -t ssh_port_t -p tcp #PORTNUMBER
#
Port 61228
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

重启ssh

systemctl restart sshd.service

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