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为保障安全,局域网和互联网经常并不直接相连甚至物理隔离,但这并不能彻底解决局域网络的安全问题。局域网络面临着内部攻击、“摆渡”攻击、非法外联以及非法接入等安全威胁。局域网安全防范的措施与方法主要包括:加强系统认证方式的安全,防止非授权访问;安装主机防火墙,防范网络内部攻击;加强涉密信息介质的管理和使用;加密存储、传输涉密信息以及及时更新安全补丁,保持系统和应用软件的安全。
For security reasons, the LAN and the Internet are often not directly connected or even physically isolated, but this does not completely solve the security problem of the LAN. Local area networks face security threats such as internal attacks, “ferry” attacks, illegal outreach and illegal access. Local area network security measures and methods include: to strengthen the security of the system authentication mode to prevent unauthorized access; install the host firewall to prevent internal network attacks; strengthen the management and use of confidential information media; encrypted storage, transmission of confidential information and timely Update security patches to maintain system and application security.