我的防火墙目前无效.
@H_301_1@systemctl status firewalld firewalld.service Loaded: masked (/dev/null) Active: inactive (dead)
我使用以下命令启用防火墙
@H_301_1@# systemctl unmask firewalld但是我收到了这个错误：
@H_301_1@# systemctl unmask firewalld Failed to issue method call: Access denied # sudo systemctl restart firewalld Failed to issue method call: Unit firewalld.service Failed to load: No such file or directory. # sudo systemctl enable firewalld Failed to issue method call: Access denied
强烈建议您使用防火墙保护服务器：
当您尝试启动或启用未在Linux系统上安装或键入错误服务名称的服务时,会出现此错误.输入以下内容查看服务列表：
@H_301_1@systemctl list-units --type=service安装(如果不可用)：
@H_301_1@yum install firewalld您可以输入以下命令启用firewalld：
@H_301_1@systemctl enable firewalld sudo systemctl enable firewalld您可以输入以下命令启动firewalld：
@H_301_1@systemctl start firewalld sudo systemctl start firewalld通过键入以下内容来查看其状态：
@H_301_1@systemctl status firewalld