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1. 发明申请

WO2004042999A1 METHOD AND ARRANGEMENT FOR PREVENTING ILLEGITIMATE USE OF IP ADDRESSES 审中-公开
标题翻译：防止非法使用IP地址的方法和安排
公开(公告)号：WO2004042999A1
公开(公告)日：2004-05-21
申请号：PCT/SE2002/002021
申请日：2002-11-06
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , NESZ, Peter , JOHANSSON, Thomas , JUHL, Michael
发明人： NESZ, Peter , JOHANSSON, Thomas , JUHL, Michael
IPC分类号： H04L9/32
CPC分类号： H04L29/06102 , H04L61/2015 , H04L63/0236 , H04L63/1466 , H04L69/16 , H04L69/161
摘要： Illegitimate use of IP addresses is counteracted. A network (1) includes a switch (5) with ports (P1,P2,P3) to subscribers (6,6A) and a port (PN) to a core network (2) with DHCP servers (4, 4a,4b). The switch includes a database (MAC1, MAC2), port numbers (P1, P2) and VLAN identities (VLAN1, VLAN2) for the subscribers (6, 6A) and the filter has a list over trusted DHCP servers. Initially onlY DHCP messages from the subscribers are allowed. When the subscriber (6) requests (M1, M3) for an IP address it is checked that it is a DHCP message with valid subscriber values (MAC1, P1, VLAN1). A respond (M2, M4) with an allocated IP address (IP1) and lease time interval (T1) is checked to come from a trusted DHCP server. If so, a list in the filter (9) with correct information is dynamically generated (MAC1, P1, VLAN1, IP1, T1). A messsage (M5) from the subscriber (6) with false IP address is discarded by the filter. Attempts by the subscriber to use false IP address are counted and a warning signal is generated.
摘要翻译： IP地址的非法使用被抵销。网络（1）包括具有用户（6,6A）的端口（P1，P2，P3）和到具有DHCP服务器（4,4a，4b）的核心网络（2）的端口（PN）的交换机（5）。交换机包括用户（6,6A）的数据库（MAC1，MAC2），端口号（P1，P2）和VLAN标识（VLAN1，VLAN2），并且过滤器在受信任的DHCP服务器上有列表。最初只允许来自用户的DHCP消息。当订户（6）请求（M1，M3）作为IP地址时，检查它是具有有效用户值（MAC1，P1，VLAN1）的DHCP消息。检查具有分配的IP地址（IP1）和租用时间间隔（T1）的响应（M2，M4）来自受信任的DHCP服务器。如果是，动态生成具有正确信息的过滤器（9）中的列表（MAC1，P1，VLAN1，IP1，T1）。来自具有假IP地址的用户（6）的消息（M5）被过滤器丢弃。用户尝试使用伪IP地址进行计数，并产生警告信号。

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