Invention Grant
- Patent Title: Subscriber line accommodation device and packet filtering method
- Patent Title (中): 用户线路住宿设备和包过滤方法
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Application No.: US11063542Application Date: 2005-02-24
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Publication No.: US07860029B2Publication Date: 2010-12-28
- Inventor: Minoru Sekine , So Sato
- Applicant: Minoru Sekine , So Sato
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2004-051747 20040226
- Main IPC: H04L12/28
- IPC: H04L12/28

Abstract:
A subscriber line accommodation device and packet filtering method is provided. In response to a request for acquisition of an IP address from a user terminal, a DHCP server in the subscriber line accommodation device allocates an IP address, registers a set of the allocated IP addresses, a MAC address of the user terminal, and a line number in a DHCP management table. The subscriber line accommodation device sets the registered information in an input filter section as a packet passing condition. Among packets sent from user terminals, the input filter section sends only those packets satisfying registered conditions toward a bridge forwarder and discards those packets not satisfying the conditions. Even when access is attempted by illegally using an IP address, the packet concerned is discarded unless the line number or a MAC address agrees.
Public/Granted literature
- US20050204062A1 Subscriber line accommodation device and packet filtering method Public/Granted day:2005-09-15
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