SSH修改默认端口重启sshd服务失败解决方法

问题

vi /etc/ssh/sshd_config

Port 2468

#使用协议版本大于等于2
Protocol 2

systemctl restart sshd，重启sshd后无反应，但远程不上。systemctl status sshd查看发现Failed to start OpenSSH server daemon.

解决方法

1. 关闭setenforce，setenforce 0
2. 设置永久关闭selinux

vi /etc/sysconfig/selinux

#修改，SELINUX=disabled

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
#SELINUX=enforcing
SELINUX=disabled
# SELINUXTYPE= can take one of three two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected.
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

3. 防火墙开放sshd端口
   忘记了命令可以看下这篇 [[firewall防火墙查看、修改和删除]]

firewall-cmd --zone=public --add-port=2468/tcp --permanent
firewall-cmd --reload
systemctl restart sshd

成功！