CVE:CVE-1999-1150
CNNVD:CNNVD-199806-024
Livingston Portmaster路由器使用相同的TCP连接的初始序列号（ISN）运行ComOS，远程攻击者利用该漏洞进行欺骗和拦截TCP会话。
solution:Upgrade livingston_portmaster portmaster to a higher version than initial,and avoid the version initial