Once two lads broke into the university network,created a bulletin board,loaded popular commercial software on it and invited users across Internet to download the packages. Thanks to a firewall,network administrators found the system breached.

• 曾有两位年轻人非法侵入了大学网络，创建了一个公告牌，并在上面装入了流行的商业软件，还邀请因特网上的用户下载这些软件包。幸好有了防火墙，网络管理员发现系统遭到了破坏。