CN101388778B - Network physical separation device and separation method thereof - Google Patents
Network physical separation device and separation method thereof Download PDFInfo
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- CN101388778B CN101388778B CN2008102349647A CN200810234964A CN101388778B CN 101388778 B CN101388778 B CN 101388778B CN 2008102349647 A CN2008102349647 A CN 2008102349647A CN 200810234964 A CN200810234964 A CN 200810234964A CN 101388778 B CN101388778 B CN 101388778B
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Abstract
The invention discloses a network physical isolation device and an isolation method of the device, which belongs to the field of computer communication security, wherein the isolation device mainly comprises a network isolator, a desktop computer power supply, a first socket, a second socket, a desktop computer network interface card, a current-limiting resistor and a switch, the network isolator comprises a third socket, a polarity inversion circuit, a relay and an anti-interference circuit, the isolation method of the device is characterized in that the actuation and the release of contacts of the relay are realized through switching and controlling the power supply, and thereby the dual-network physical cutting off or the single-network physical cutting off can be realized. The device realizes to combine the three functions of the single-network physical switching, the dual-network physical switching and the single-network physical cutting off into a whole, the network isolator can be powered on when the desktop computer is operated, and the device has no need of adding anther power supply and has simple structure, flexible control and convenient use.
Description
Technical field
The present invention relates to a kind of network isolating device, relate in particular to a kind of network physical isolation apparatus and partition method thereof, belong to the compunication security fields.
Background technology
The purposes that network physical is isolated is divided into two kinds, and a kind of is that dual network physics switches, and another kind is that single network physical cuts off.Wherein, according to arriving the desktop computer number of network node, the dual network physical isolation is divided into single netting twine dual network physics again and switches and two kinds of two netting twine dual network physics switchings.The desktop computer of single node is used with network selector in single netting twine network security separate card and the machine room and finishes the switching of dual network physics; Binodal desktop computer just can directly be finished dual network physics with two netting twine network security separate cards and switch; And single network physical cuts off at present technical still blank.Above-mentioned network physical partition method seems good, but shortcoming is arranged respectively: (1) single node desktop computer is finished the network selector that dual network physics switches and use need be connected to external power source, can not cut off the network selector power supply in real time along with desktop computer uses network, not energy-conservation; (2) the binode desktop computer is finished two netting twine network security separate cards that dual network physics switches and use, and it has dragged two netting twines to the wall in the network terminal box, and is not attractive in appearance, and the easy wrong of user, and other people are easy to the reconfiguration network connection and steal another network.Owing to have described shortcoming, so two netting twine network security separate cards do not substitute single network physical and cut off.
Summary of the invention
The present invention cuts off problem and proposes a kind of network physical isolation apparatus and partition method thereof for operation, power saving and the single network physical that solves the switching of dual network physics.
A kind of network physical isolation apparatus, mainly comprise: Network Physical Separator, desktop computer power supply, first socket, second socket, desktop computer network interface card, current-limiting resistance and switch, described Network Physical Separator comprises the 3rd socket, polarity transformation circuits, relay and anti-jamming circuit; Wherein: the desktop computer power output end is connected second socket by current-limiting resistance successively with switch, the desktop computer network interface card connects second socket by first socket, second socket connects the 3rd socket, two outputs of the 3rd socket connect two inputs of polarity transformation circuits respectively, the coils from parallel connection of coils of relay at polarity transformation circuits just, negative output terminal, the negative output terminal of polarity transformation circuits connects the input of anti-jamming circuit, other four outputs of the 3rd socket connect first network 1 and second network 2 respectively through four contact fixing points of relay, and the output of anti-jamming circuit connects first network 1 and second network 2 respectively.
The above current-limiting resistance is used for limiting the short circuit current and the relay coil operating current of Ethernet cable, according to the difference of desktop computer supply voltage and relay coil voltage and the value of relay attract current selection current-limiting resistance.
A kind of partition method based on this network physical isolation apparatus: the connecting and disconnecting by switch control power supply, realize the adhesive and the release of relay contact, finish the switching of dual network physics or single network physical and cut off, be divided into following situation:
(1) when switch connection, relay power, its normally opened contact adhesive, the network physical that is connected with normally opened contact is connected;
(2) when switch disconnects, the relay outage, its normally-closed contact discharges, and the network physical that is connected with normally-closed contact is connected.
The present invention not only is used for dual network desktop computer dual network physical isolation and switches, and be applicable to that single network desktop computer network physical cuts off control, the user only needs control switch just can realize above-mentioned functions, desktop computer is as long as connect an Ethernet cable to Network Physical Separator, Network Physical Separator does not need to import in addition power supply, by the power supply power supply of desktop computer, energy-saving safe, simple in structure, control flexibly.
Description of drawings
Fig. 1 is structural circuit figure of the present invention.
Embodiment
As shown in Figure 1, a kind of network physical isolation apparatus, comprise Network Physical Separator, desktop computer ATX (BTX) power supply, RJ45 socket J1, RJ45 socket J2, desktop computer network interface card, current-limiting resistance R and K switch, described Network Physical Separator comprises relay, polarity transformation circuits, anti-jamming circuit and RJ45 socket J3, its repeat circuit is the net transfer relay, be used for network 1, network 2 concrete physics switchings and single network physical and cut off control, be direct current relay.The VCC output of desktop computer ATX (BTX) power supply is connected in series a end of current-limiting resistance R and K switch successively, 4 of RJ45 socket J2, be connected with the b end of K switch behind the 5 pin short circuits, 7 of RJ45 socket J2, ground end with desktop computer ATX (BTX) power supply behind the 8 pin short circuits is connected, 1 of RJ45 socket J1,2,3,6 pin respectively with 1 of RJ45 socket J2,2,3,6 pin are corresponding to link to each other, 4 of RJ45 socket J1,5,7,8 pin are unsettled, Ethernet cable with a double headed roller RJ45 joint is connected RJ45 socket J1 with the desktop computer network interface card, Ethernet cable with a double headed roller RJ45 joint is connected RJ45 socket J2 with the RJ45 socket J3 of Network Physical Separator, 1 of RJ45 socket J3,2,3,6 pin are connected with four groups of contact fixing points of relay respectively, for in the Ethernet cable of dual network (network 1 and network 2) 1,2,3,6 ends respectively be connected corresponding of four groups of normally opened contacts of relay with normally-closed contact, for in the Ethernet cable of single network (network 1 or network 2) 1,2,3, four groups of corresponding being connected of normally opened contact of 6 ends and relay, 4 and 5 end short circuits in the Ethernet cable of dual network (network 1 and network 2) or single network (network 1 or network 2), 7 with 8 end short circuits after be connected with anti-jamming circuit, anti-jamming circuit is connected with the output negative pole of polarity transformation circuits, just is exporting with polarity transformation circuits respectively at the relay coil two ends, negative pole is connected, RJ45 socket J3 4 with 5 pin short circuits after be connected with an input of polarity transformation circuits, RJ45 socket J3 7 with 8 pin short circuits after be connected with another input of polarity transformation circuits.
RJ45 socket J1, RJ45 socket J2, current-limiting resistance R and K switch are installed on the desktop computer, wherein: RJ45 socket J1 and J2 are installed on the cabinet backboard, current-limiting resistance R installs cabinet inside, and K switch is that a switch with lock is installed on the cabinet panel; Network Physical Separator is used for specifically finishing the switching of dual network physics and single network physical cuts off, for binodal desktop computer Network Physical Separator is placed on its corresponding wall in the network terminal box, for the desktop computer of single node Network Physical Separator is concentrated to place in the machine room control cabinet, be used for Network Physical Separator that single network physical cuts off desktop computer and place on its wall in the network terminal box or concentrate and place in the machine room control cabinet; The Push And Release of desktop computer user by control switch K provides power supply and control signal to Network Physical Separator for the net transfer relay with the power delivery of computer ATX (BTX): when K switch is connected, network transfer relay coil electricity, the normally opened contact adhesive, the network physical that is connected with normally opened contact is connected; When K switch disconnects, network transfer relay coil blackout, normally opened contact discharges, and the network physical that is connected with normally-closed contact is connected.
The above current-limiting resistance R is used for limiting the short circuit current and the relay coil operating current of Ethernet cable, according to the difference of desktop computer supply voltage and relay coil voltage and the value of relay attract current selection current-limiting resistance R.
Claims (3)
1. network physical isolation apparatus, it is characterized in that: comprise Network Physical Separator, desktop computer power supply, first socket (J1), second socket (J2), desktop computer network interface card, current-limiting resistance (R) and switch (K), described Network Physical Separator comprises the 3rd socket (J3), polarity transformation circuits, relay and anti-jamming circuit; Wherein: the desktop computer power output end is connected second socket (J2) by current-limiting resistance (R) with switch (K) successively, the desktop computer network interface card connects second socket (J2) by first socket (J1), second socket (J2) connects the 3rd socket (J3), two outputs of the 3rd socket (J3) connect two inputs of polarity transformation circuits respectively, the coils from parallel connection of coils of relay at polarity transformation circuits just, negative output terminal, the negative output terminal of polarity transformation circuits connects the input of anti-jamming circuit, other four outputs of the 3rd socket (J3) connect first network (1) and second network (2) respectively through four contact fixing points of relay, and the output of anti-jamming circuit connects first network (1) and second network (2) respectively.
2. a kind of network physical isolation apparatus according to claim 1, it is characterized in that: current-limiting resistance (R) is used for limiting the short circuit current and the relay coil operating current of Ethernet cable, according to the difference of desktop computer supply voltage and relay coil voltage and the value of relay attract current selection current-limiting resistance (R).
3. partition method based on the described network physical isolation apparatus of claim 1, it is characterized in that: by the connecting and disconnecting of switch (K) control power supply, realize the adhesive and the release of relay contact, finish the switching of dual network physics or single network physical and cut off, be divided into following situation:
(1) when switch (K) is connected, relay power, its normally opened contact adhesive, the network physical that is connected with normally opened contact is connected;
(2) when switch (K) disconnects, the relay outage, its normally-closed contact discharges, and the network physical that is connected with normally-closed contact is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102349647A CN101388778B (en) | 2008-11-05 | 2008-11-05 | Network physical separation device and separation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102349647A CN101388778B (en) | 2008-11-05 | 2008-11-05 | Network physical separation device and separation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101388778A CN101388778A (en) | 2009-03-18 |
| CN101388778B true CN101388778B (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102349647A Expired - Fee Related CN101388778B (en) | 2008-11-05 | 2008-11-05 | Network physical separation device and separation method thereof |
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| Country | Link |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533843B (en) * | 2016-12-23 | 2018-08-07 | 江苏中利电子信息科技有限公司 | The detection platform of intelligent ad hoc network data terminal communication base station |
| CN107122684B (en) * | 2017-05-05 | 2019-12-03 | 河南理工大学 | A kind of information security of computer network control device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619494A (en) * | 1990-05-18 | 1997-04-08 | Mitsubishi Cable Industries, Ltd. | Access unit for local area network and concentrator system thereof |
| US6105091A (en) * | 1998-05-01 | 2000-08-15 | International Business Machines Corporation | Connector with integrated bus and power isolation switches |
| CN2612171Y (en) * | 2003-04-14 | 2004-04-14 | 倪祖华 | Dynamo type converter between network |
| CN2682738Y (en) * | 2004-01-19 | 2005-03-02 | 宝山钢铁股份有限公司 | Internal-external network isolation switcher |
-
2008
- 2008-11-05 CN CN2008102349647A patent/CN101388778B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619494A (en) * | 1990-05-18 | 1997-04-08 | Mitsubishi Cable Industries, Ltd. | Access unit for local area network and concentrator system thereof |
| US6105091A (en) * | 1998-05-01 | 2000-08-15 | International Business Machines Corporation | Connector with integrated bus and power isolation switches |
| CN2612171Y (en) * | 2003-04-14 | 2004-04-14 | 倪祖华 | Dynamo type converter between network |
| CN2682738Y (en) * | 2004-01-19 | 2005-03-02 | 宝山钢铁股份有限公司 | Internal-external network isolation switcher |
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| Publication number | Publication date |
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| CN101388778A (en) | 2009-03-18 |
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Owner name: CHANGSHU NJNU DEVELOPMENT INSTITUTE Free format text: FORMER OWNER: JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY Effective date: 20120822 |
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Effective date of registration: 20120822 Address after: 215500 Changshou City South East Economic Development Zone, Jiangsu, Jin Road, No. 8 Patentee after: Changshu Nanjing Normal University Development Research Academy Institute Co., Ltd. Address before: 212003 Zhenjiang,, Jiangsu, Jiangsu University of Science and Technology, No. Patentee before: Jiangsu University of Science and Technology |
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