必须包含的“固定ip”是服务器的真实(而不是虚拟)地址。

The "fixed IP" addresses that have to be included are the real (not virtual) addresses of the servers.

youdao

攻击者使用IP欺骗来隐藏自己的真实地址，因此人们开始研究IP源回溯技术。

As the attackers usually use IP spoofing to conceal their real location, people started to study the IP Traceback.

youdao

IP协议中最脆弱的策略就是让源主机自己填写源IP地址，并且在TCP／IP协议中也没有提供一种机制来验证源IP地址的真实性。

The weakness in Internet Protocol is that the source host itself fills in the IP source host id, and there is no provision in TCP/IP to discover the true origin of a packet.

youdao