Upside down world: back door Kill firewall&antivirus software(figure)-vulnerability warning-the black bar safety net

Often in the Get WebShell and elevation of Privilege, the server firewall or antivirus just to play a role, let's pass up the tools of the old disappear; or some firewall settings very BT, often causing a lot of inconvenience. Although some of the back door with cleanup antivirus and firewall...