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Gigabit firewall device

A firewall and gigabit technology, applied in the field of firewall equipment, can solve problems such as reduced reliability, inability to meet commercial applications, and increased system complexity

Inactive Publication Date: 2004-10-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution is to use half-duplex operation, that is, only use 50% of the network bandwidth; or use two monitoring systems to filter the internal and external networks respectively, but this will double the cost, increase the complexity of the system, and Unfavorable factors such as reduced reliability; and, even so, the system needs to spend 50% of the time empty for the transmission of packets between the network card and the memory
[0005] 3) Ordinary 100M and 1000M NICs are not customized devices for firewall systems, they will frequently interrupt when receiving and sending a large number of messages, and the system will consume a lot of time when switching processes
Even so, the results are not satisfactory for commercial applications

Method used

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Embodiment Construction

[0034] The gigabit firewall equipment involved in the present invention consists of first and second photoelectric converters 1 made of chip HFBR-53D5 I ,1 E , the first and second serial-to-parallel converters made by chip HDMP-1646A 2 I ,2 E The internal and external network interface units, the core data processing unit, the SRAM 10 and the content addressable memory CAM 11 are sequentially connected in series.

[0035] image 3 The first and second photoelectric converters 1 I ,1 E Its function is to convert optical signals into electrical signals, or vice versa. The optical signal is converted into a PECL (Positive Emitter Coupled Logic, positive voltage emitter coupled logic) electrical signal and sent to the first and second serial-to-parallel converters 2 I ,2 E processing; from the first and second serial-to-parallel converters 2 I ,2 E The sent PECL signal is converted into an optical signal and sent out.

[0036] image 3 The first and second serial-to-pa...

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Abstract

A gigabit firewall device in the form of FPGA is composed of Internet and Intranet adapter, photoelectric converter, serial-parallel converter, key data processing unit, frame fetching unit, rule search control unit, forward control unit, massage buffer unit, PCI bus interface, the interfaces for SRAM and CAM, SRAM and CAM. Its advantage is full hardware for higher efficiency.

Description

technical field [0001] The gigabit firewall equipment belongs to the technical field of firewall equipment. Background technique [0002] Now almost all firewall systems use a microcomputer motherboard plus dual network cards to form a microcomputer filtering system based on the IA32 (32bit Intel Architecture, 32bit Intel Architecture) structure. In this system, the message received from a network card is delivered to the system memory through the PCI (Peripheral Component Interfaces, external device interface) bus, and then sent to another network through the PCI bus after being processed by the CPU (Central Processing Unit, central processing unit). A network card, and then sent out. This type of system transparently receives and forwards messages through the network card installed in the microcomputer, and all processing of network data is undertaken by background software. Its structure is as figure 1 shown. Among them, NIC (NetworkInterface Card) is a network interf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F13/14G06F15/16
Inventor 张承蒋东兴刘启新
Owner TSINGHUA UNIV