CN101321061A - Dual-network isolation switching mechanism and method for network computer - Google Patents
Dual-network isolation switching mechanism and method for network computer Download PDFInfo
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Abstract
The invention discloses a network computer double net isolation switching device and a switching method, which mainly realizes the secure physical isolation visit of two different networks using the network computer, and realizes the automatic transparent switching visit of the two networks using the software method. The switching device is composed of two same data signal transmitting branch, a trigger (2), a chip integrated with MAC (101) and GPIO (102), wherein each data signal transmitting branch is composed of a physical layer controller PHY (3), a transformer (4), a RJ45 interface (5) connected serially in turn. One spare pin of the GPIO (102) is set as 0 or 1 through the software method, which transmits the signals if high lever or the low level to the trigger (2), drives the trigger (2) to alternately gate two data signal transmitting branches. According to the invention, the secure isolation visit to the inner and the outer nets is conveniently realized, with low cost and increased working efficiency.
Description
Technical field
The present invention relates to computer network and field of information security technology, particularly relate to the two nets of a kind of network computer and isolate switching device shifter and changing method.
Background technology
Wide application of information technology and the Internet are opened, when the information sharing environment has brought affluent resources to people, have also been brought potential security threat.The hacker, network security in a series of safety problem serious threats such as computer virus, careless slightlyly will cause great loss.At present, in office automation, many modes that all adopted Intranet and outer net isolation are with the protection significant data in the systems such as E-Government and ecommerce, and access internet is to obtain various information simultaneously.The following solution of general employing: the one, for each user sets up two separate networks, be equipped with two PCs on each user's desk, connect internal network and external network respectively, the shortcoming of this mode is a replacement computer equipment expense height, takes up space.The 2nd, two hard disks, two network interface cards, physics diverter switch A/B interchange box is equipped with two and overlaps independently hardware device in a cabinet, and this side's shortcoming is two complete equipments in the cabinet, and is technical unreasonable, the price height.
Network computer (Network Computer is called for short NC) is a kind of computing environment Network Based, user oriented terminal process equipment.It does not generally have external memory storages such as hard disk, floppy disk and CD-ROM drive, but obtains most of resource by network, and its needed application program and data all are stored on the server.Compare with ordinary PC have safe, total cost is low, be easy to advantages such as management, good reliability, become intranet and extranet just gradually and isolate first-selected computer product.
Many network computers have adopted two network interface methods for designing, two nets are set isolate.This two net is isolated the safety of the information that guaranteed, but because two net is isolated, the user often needs alternately switching of frequent realization terminal equipment intranet and extranet.Thereby make terminal equipment can visit external network, can on internal network, work again and can be information leakage.Present most of network computer is to adopt two network interface card designs and switch the connection heterogeneous networks by the mode of physical switch.The patent No. of announcing as Patent Office of the People's Republic of China is " method of network computer switching server " patent of 200410006079.5, this method is by means of physical smart card storage link information, the user need take care of storage card, but the use of storage card has improved product cost.Because this method final purpose is the Connection Service device, so smart card is only preserved link information, and can't finish the switching of network automatically, needs user's manual switchover physical connection.The patent No. that also has Patent Office of the People's Republic of China to announce is " method for switching network in many networks " patent of 200410051651.X, this method is to select in a plurality of networks that same services is provided, and can not automatically in different networks, switch at user's request.
Mostly existing method is by means of physical unit; need user's manual modification; frequent like this manual operation usually can allow the user feel too loaded down with trivial details, and the switching stand-by period outside the Connection Service device also can increase user's bored psychology, has caused inconvenience in many uses to the user.And the preservation of link information usually is by means of extra physical storage device, and these physical storage devices have increased the cost expense of user's administrative burden and product.
Summary of the invention
The object of the present invention is to provide the two nets of a kind of network computer to isolate switching device shifter and changing method, it can realize the safe physical isolation of two heterogeneous networks, and under situation not by any other physical equipment and physical unit, the automatic switchover network interface accomplishes that handoff procedure is to user transparent.
For realizing above-mentioned goal of the invention, provide the two nets of a kind of network computer to isolate switching device shifter:
The two nets of a kind of network computer are isolated switching device shifter, it is characterized in that: comprise by the RJ45 interface being connected in series two data branch roads, diverter switch and the SOC (system on a chip) (SOC) that form with transformer, phy controller (PHY), wherein:
Described SOC (system on a chip) is isolated switching device shifter for the two nets of described network computer provides a media access layer controller (MAC) and a multipurpose input-output system (GPIO);
The data port of described diverter switch connects the data signal transmission wire of described MAC controller and the phy controller of described two data branch lines respectively;
Described diverter switch, control by software approach by described multipurpose input-output system, be used for alternately two data branch roads of gating, make arbitrary moment have only a data branch road to be communicated with, and together constitute a whole network data transmit-receive path with the media access layer controller.
The two nets of a kind of network computer are isolated switching device shifters, it is characterized in that: comprise by the RJ45 interface with transformer, be connected in series two the data branch roads, diverter switch, phy controller (PHY) and the SOC (system on a chip) (SOC) that form, wherein:
Described SOC (system on a chip) is isolated switching device shifter for the two nets of described network computer provides a media access layer controller (MAC) and a multipurpose input-output system (GPIO);
The data port of described diverter switch connects the data signal transmission wire of described phy controller and the transformer terminal of described two data branch lines respectively;
Described diverter switch, control by software approach by described multipurpose input-output system, be used for alternately two data branch roads of gating, make arbitrary moment have only a data branch road to be communicated with, and together constitute a whole network transmitting-receiving path with phy controller, media access layer controller.
The two nets of a kind of network computer are isolated switching device shifter, it is characterized in that:
Described diverter switch is controlled by software approach by described multipurpose input-output system, and arbitrary moment has only the data branch line can be by gating.
The two nets of a kind of network computer are isolated switching device shifter, it is characterized in that:
Described diverter switch can be realized by two choosings or multiselect chip.
The two nets of a kind of network computer are isolated switching device shifter, it is characterized in that:
Described multipurpose input-output system by two idle pin, utilizes low level and high level signal to control described diverter switch and selects to switch.
For achieving the above object, provide the two nets of a kind of network computer to isolate changing method:
The two nets of a kind of network computer are isolated changing method, it is characterized in that:
By setting up server and local networked computer configuration information, use software approach to come control its switch between two data branch lines, to switch selection, realize that two nets to the complete transparent switching of user, may further comprise the steps:
Step 1: the server that the user selects to login as required connects, and network computer reads the link information at this server;
Step 2: network computer disposes self attributes according to link information;
Step 3: network computer is judged the network of required connection, and carries out matching ratio with the current network interface of enabling, and whether need to confirm handover network, switches as need, switches then execution in step four as needs, otherwise execution in step six;
Step 4: network interface changeover program invoke memory liquidation procedures, remove the internal memory presence information;
Step 5: the network interface changeover program put described multipurpose input-output system, drive described diverter switch and send high level or low level switching signal and carry out network interface and switch;
Step 6: network computer and server connect, and finish this switching and attended operation.
The two nets of a kind of network computer are isolated changing method, it is characterized in that:
User's configuration information that can in the configuration file that network computer carries, write direct, and configuration information is kept in the local operation system, do not need to deposit configuration information by means of other storage medium.
The two nets of a kind of network computer are isolated changing method, it is characterized in that:
Handoff procedure confirms whether need to switch, call the network interface changeover program by network computer then by the configuration information matching ratio, and changeover program uses software approach automatic switchover network interface, and the user needn't the manual operation physical equipment.
The two nets of a kind of network computer are isolated changing method, it is characterized in that:
The server that the user only need select desire to connect, network computer can connect configuration information according to server and once finish the configuration of network calculations machine local automatically, and whole operations of network switching and Connection Service device make handoff procedure transparent fully to the user.
The two nets of a kind of network computer are isolated changing method, it is characterized in that:
Described internal memory liquidation procedures can be removed network computer internal memory resident data, and need not restart network computer.
The two nets of a kind of network computer are isolated changing method, it is characterized in that:
The network interface changeover program is to the two idle pin set 0 of multipurpose input-output system or 1, and it is high level or low level signal that described multipurpose input-output system sends signal to described diverter switch.
By implementing the present invention, can realize the safe physical isolation of the two nets of network computer, automatic transparent handoff functionality.Because the present invention does not have extra physics switching device shifter or physical storage device, purchase cost and management cost have been reduced on the one hand; Reduced the error of user's manual operation physical equipment on the other hand, also reduced the user and carried out frequent intranet and extranet switching and the boredom of generation.Automatic transparent switching connects the also process of logon server, has exempted loaded down with trivial details manual switchover operation, has saved the stand-by period of manual switchover.
Two automatically nets switch has realized that network switches the transparency to the user, the user only need have network computer, and need not after confirming the server that will connect, not need to be concerned about the place network and whether need to switch network interface by any other physical equipment and physical unit.Hidden the process that network switches, original network has been switched and Connection Service device operation one goes on foot and finishes, and handoff procedure do not need to restart machine, increased operating efficiency widely.
Description of drawings
The present invention is further detailed explanation below in conjunction with accompanying drawing and concrete execution mode.
Fig. 1 is the structural representation that the two nets of present networks computer are isolated a kind of execution mode of switching device shifter.
Fig. 2 is the structural representation that the two nets of present networks computer are isolated a kind of preferred implementation of switching device shifter.
Fig. 3 is the simple flow chart that the two nets of present networks computer are isolated changing method.
Fig. 4 is the detail flowchart that the two nets of present networks computer are isolated changing method.
Embodiment
Among the embodiment of switching device shifter of the present invention, the two nets of network computer are isolated switching device shifter and are designed to the R-T unit that network computer connects network, and it carries out the data transmission-receiving function.Present embodiment provides has the isolation switching device shifter that two network interfaces can insert two heterogeneous networks, on this basis, can be easy to it is expanded to the switching device shifter of a plurality of network interfaces, at this only so that the execution mode of two RJ45 interfaces is described accordingly.By two network interfaces, network computer is inserted in the heterogeneous networks, and realize safe physical isolation visit of the two nets of network computer and automatic transparent switching.
Shown in Figure 1 is a kind of execution mode structured flowchart of the two net switching device shifters of network computer of the present invention, and this switching device shifter is made of two identical data branch roads, diverter switch 2, the SOC1 chip that is integrated with MAC101 and GPIO102.Wherein, every data is propped up route phy controller PHY3, transformer 4, RJ45 interface 5 and is connected in series formation successively.The data port of diverter switch 2 connects the MAC101 data signal transmission wire of SOC1 chip and the phy controller PHY3 end of two data branch lines respectively.Diverter switch 2 replaces to switch between two data branch roads to be selected, make arbitrary moment all keep having only a branch road by gating, the connection of arbitrary bars transmission branch road just together constitutes a network data transmitting-receiving path with MAC101, carry out data-transformation facility, realize visit Internet resources.Article two, arbitrary of branch road then had only that branch road to be in initiate mode by gating, also just can have a network interface to use, and another network interface is in off-state, thereby guaranteed that two networks are in physical isolation completely, have guaranteed the safety of data.
The characteristics of Fig. 1 embodiment have provided two data branch roads with two PHY, and come control its switch 2 to carry out branch road by the GPIO102 that SOC1 provided and select.
Structural representation shown in Figure 2, preferred implementation are the improvement of carrying out on the basis of Fig. 1 execution mode.This switching device shifter reduces the use of a PHY on the basis of Fig. 1, it is connected and then connects diverter switch 2 by the MAC101 of SOC1 chip earlier with PHY3, selecting to switch to two transfer of data branch roads from the data-signal of PHY3, two identical transfer of data branch roads are to be connected in series successively by transformer 4, RJ45 interface 5 to constitute by diverter switch 2.Diverter switch 2 and execution mode 1 are the same to be controlled by the high-low level signal that GPIO provided.
Fig. 2 compares with the embodiment of Fig. 1, it is advantageous that the use that has reduced by a PHY has reduced production cost on the one hand, and on the other hand, PHY directly is connected with MAC, helps carrying out integrated design.
Fig. 1, two kinds of execution modes of Fig. 2 all are easy to expand, and the connection of a plurality of network interfaces is set if desired, and those needs add some branch roads again on basis of the present invention, and the safety that can constitute Multi-netmouth is isolated, and it is in protection scope of the present invention.
The two nets of network computer are isolated changing method, and main is exactly to send the diverter switch control signal by software approach control GPIO102, drives diverter switch and switches to another branch road, enables another network interface.It realizes that two automatically nets switch, handoff procedure is to user transparent, and the user need only use network computer, and does not need physical equipment or physical unit by any other, after confirming the server that will connect, must not be concerned about the place network and whether need to switch network interface.Hidden network switching process, original network switching and one step of Connection Service device operation are finished, and handoff procedure needn't restart network computer.
Fig. 3 is that the two nets of network computer are isolated the main flow chart of switching, and Fig. 4 is a detail flowchart, comprises following step:
Step 1, the information that connects, network computer are used in reference to the wire guide network in this locality storage and switch and the server connection configuration information that is connected.Connect the IP address that configuration information comprises the server that is connected, the IP address of map network computer network interface (A mouth or B mouth) when connecting this machine, subnet mask and optional routing iinformation be not (if there is route need in the subnet, then needn't dispose routing iinformation, route if desired, then can indicate information such as gateway, the network segment).Server connects configuration information and can write in advance in the local profile of network computer according to user's needs.And can revise at any time, increase and deletion.
Step 3, user select different Connection Service devices as required, click login.Show each Connection Service device on graphic user interface, the user can connect by clicking corresponding server, finishes according to the needed network switch operating of this connection configuration to be connected work with server.Whole network switching process is to user transparent, and the user only sees the needed server of connection, and the switching that does not need to judge whether handover network and manually finish network.
Step 6, network computer call RDP agreement or XDMCP agreement Connection Service device, finish this and connect handover operation.
Above-mentioned all operations does not need user intervention, and system finishes all switchings automatically and is connected work.
For ease of understanding, lift an example with reference to Fig. 3, Fig. 4 and further specify.
As, Intranet and outer net two-server are arranged respectively, the IP address of interior network server is 192.168.10.18, the IP address of outer network server is: 192.168.200.99.Daily main work must be carried out on interior network server, need login outer network server but also need to carry out web page browsing sometimes.As user's network server in the back login of going to work, on graphic user interface, select the icon of 192.168.10.18 server correspondence this moment, network computer is configured according to this link information and is connected at this moment, when needing browsing page during the working, only need on graphic user interface, select the icon of 192.168.200.99 server correspondence.Network computer reads link information automatically, finishes the network switching and is connected logon server, need not the user and does any additional operations.
Wherein, network computer can be stored the link information of several servers in server list in this locality, and every link information comprises the IP address of server and the network of the specified connection of this server.Corresponding each network interface all has the corresponding network interface configuration information of this machine, comprising: this machine IP address under this network interface, the IP address of expression network computer; Subnet mask, be used to judge with the server that will be connected whether at the same network segment; Network interface, expression are set up this and are connected the network interface that netting twine connected that needs use, also need default gateway sometimes.
Network computer is by agreements such as RDP, XDMCP or ICA login Windows or Linux server.Whole process, the user does not need manually to be provided with this machine IP address, subnet mask or server ip.For the situation of the shared station server of a plurality of users, a link information can be used for a plurality of users, and link information is stored in the local system configuration file of network computer, can revise or delete after being provided with.After preserving, link information can not start network computer once more and still can normally use original link information along with shutdown disappears.
Shown in Figure 4, above step 5 may further comprise the steps:
51 network computers are judged the network of required connection, whether confirm handover network then, and promptly whether the pre-connection network is identical with current network of living in;
If 52 is identical, then direct Connection Service device switches otherwise carry out network interface;
53 network computers are followed according to link information configuration self attributes, comprise this machine of modification IP, if the routing iinformation that connects in the configuration information is not empty, then according to routing iinformation configuration routing table;
54 network computer invoke memory cleaning tools are removed the resident data message of internal memory;
55 network computers call the network interface changeover program, and it is 0 or 1 with the GPIO102 pin set of a reservation that the network interface changeover program uses software approach;
56 high-low levels according to this reserved pin drive diverter switch 2, disconnect and another branch road of gating, change the state that the current network computer connects network interface, thereby finish the switching of network interface.
For those skilled in the art; after having understood content of the present invention and principle; can be under the situation that does not deviate from the principle and scope of the present invention; the method according to this invention is carried out various corrections and the change on form and the details, but these are based on correction of the present invention with change still within claim protection range of the present invention.
Claims (11)
1. the two nets of network computer are isolated switching device shifter, it is characterized in that:
Comprise by RJ45 interface (5) being connected in series two data branch roads, diverter switch (2) and the SOC (system on a chip) (1) that forms with transformer (4), phy controller (3), wherein:
Described SOC (system on a chip) (1) is isolated switching device shifter for the two nets of described network computer provides medium to visit an interbed controller (101) and a multipurpose input-output system (102);
The data port of described diverter switch (2) connects the data signal transmission wire of described MAC controller (102) and the phy controller (3) of described two data branch lines respectively;
Described diverter switch (2), control by software approach by described multipurpose input-output system (102), be used for alternately two data branch roads of gating, make arbitrary moment have only a data branch road to be communicated with, and together constitute a whole network data transmit-receive path with media access layer controller (101).
2. the two nets of network computer are isolated switching device shifter, it is characterized in that:
Comprise by RJ45 interface (5) being connected in series two data branch roads, diverter switch (2), phy controller (3) and the SOC (system on a chip) (1) that forms with transformer (4), wherein:
Described SOC (system on a chip) (1) is isolated switching device shifter for the two nets of described network computer provides a media access layer controller (101) and a multipurpose input-output system (102);
The data port of described diverter switch (2) connects the data signal transmission wire of described phy controller (3) and transformer (4) end of described two data branch lines respectively;
Described diverter switch (2), control by software approach by described multipurpose input-output system (102), be used for alternately two data branch roads of gating, make arbitrary moment have only a data branch road to be communicated with, and together constitute a whole network transmitting-receiving path with phy controller (3), media access layer controller (101).
3. the two nets of network computer as claimed in claim 1 or 2 are isolated switching device shifter, it is characterized in that:
Described diverter switch (2), by software approach control, arbitrary moment has only the data branch line can be by gating by described multipurpose input-output system (102).
4. isolate switching device shifter as claim 1 or the two nets of 2 or 3 described network computers, it is characterized in that:
Described diverter switch (2) can be realized by two choosings or multiselect chip.
5. isolate switching device shifter as claim 1 or the two nets of 2 or 3 described network computers, it is characterized in that:
Described multipurpose input-output system (102) by two idle pin, utilizes low level and high level signal to control described diverter switch (2) and selects to switch.
6. the two nets of network computer are isolated changing method, it is characterized in that:
By setting up server and local networked computer configuration information, use software approach to come control its switch between two data branch lines, to switch selection, realize that two nets to the complete transparent switching of user, may further comprise the steps:
Step 1: the server that the user selects to login as required connects, and network computer reads the link information at this server;
Step 2: network computer disposes self attributes according to link information;
Step 3: network computer is judged the network of required connection, and carries out matching ratio with the current network interface of enabling, and whether need to confirm handover network, switches as need, switches then execution in step four as needs, otherwise execution in step six;
Step 4: network interface changeover program invoke memory liquidation procedures, remove the internal memory presence information;
Step 5: the network interface changeover program put described multipurpose input-output system (102), drive described diverter switch (2) and send high level or low level switching signal and carry out network interface and switch;
Step 6: network computer and server connect, and finish this switching and attended operation.
7. the two nets of network computer as claimed in claim 6 are isolated changing method, it is characterized in that:
User's configuration information that can in the configuration file that network computer carries, write direct, and configuration information is kept in the local operation system, do not need to deposit configuration information by means of other storage medium.
8. the two nets of network computer as claimed in claim 6 are isolated changing method, it is characterized in that:
Handoff procedure confirms whether need to switch, call the network interface changeover program by network computer then by the configuration information matching ratio, and changeover program uses software approach automatic switchover network interface, and the user needn't the manual operation physical equipment.
9. the two nets of network computer as claimed in claim 6 are isolated changing method, it is characterized in that:
The server that the user only need select desire to connect, network computer can connect configuration information according to server and once finish the configuration of network calculations machine local automatically, and whole operations of network switching and Connection Service device make handoff procedure transparent fully to the user.
10. isolate changing method as claim 6 or the two nets of 8 described network computers, it is characterized in that:
Described network interface changeover program comprises the internal memory cleaning tool, can remove network computer internal memory resident data, and need not restart network computer.
11. isolate changing method as claim 6 or the two nets of 8 described network computers, it is characterized in that:
Described network interface changeover program is to (102) the two idle pin set 0 of multipurpose input-output system or 1, and sending signal to described diverter switch (2) is high level or low level signal.
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| CNA2007101059500A CN101321061A (en) | 2007-06-04 | 2007-06-04 | Dual-network isolation switching mechanism and method for network computer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102346818A (en) * | 2010-08-02 | 2012-02-08 | 南京壹进制信息技术有限公司 | Computer network environment isolation system implemented by using software |
| CN102375517A (en) * | 2010-08-19 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | System and method for emptying complementary metal oxide semiconductor (CMOS) data |
| CN103546478A (en) * | 2013-10-30 | 2014-01-29 | 国家信息中心 | Internal and external network secure access method and system |
| CN103716257A (en) * | 2013-12-27 | 2014-04-09 | 普华基础软件股份有限公司 | Network switching system |
| CN102375517B (en) * | 2010-08-19 | 2016-12-14 | 中山市云创知识产权服务有限公司 | Empty the system and method for cmos data |
| CN106341830A (en) * | 2015-07-07 | 2017-01-18 | 西安中兴新软件有限责任公司 | Method for realizing networking mode switching and terminal |
| CN108737188A (en) * | 2018-05-24 | 2018-11-02 | 郑州云海信息技术有限公司 | A kind of net card failure switching system |
| CN109309674A (en) * | 2018-09-19 | 2019-02-05 | 广州市图文科技有限公司 | A kind of simple and safe practical dual net physical isolation automatic switchover technology |
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- 2007-06-04 CN CNA2007101059500A patent/CN101321061A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346818A (en) * | 2010-08-02 | 2012-02-08 | 南京壹进制信息技术有限公司 | Computer network environment isolation system implemented by using software |
| CN102346818B (en) * | 2010-08-02 | 2014-11-12 | 南京壹进制信息技术有限公司 | Computer network environment isolation system implemented by using software |
| CN102375517A (en) * | 2010-08-19 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | System and method for emptying complementary metal oxide semiconductor (CMOS) data |
| CN102375517B (en) * | 2010-08-19 | 2016-12-14 | 中山市云创知识产权服务有限公司 | Empty the system and method for cmos data |
| CN103546478A (en) * | 2013-10-30 | 2014-01-29 | 国家信息中心 | Internal and external network secure access method and system |
| CN103716257A (en) * | 2013-12-27 | 2014-04-09 | 普华基础软件股份有限公司 | Network switching system |
| CN103716257B (en) * | 2013-12-27 | 2017-01-04 | 普华基础软件股份有限公司 | A kind of network switched system |
| CN106341830A (en) * | 2015-07-07 | 2017-01-18 | 西安中兴新软件有限责任公司 | Method for realizing networking mode switching and terminal |
| CN106341830B (en) * | 2015-07-07 | 2021-07-20 | 西安中兴新软件有限责任公司 | Method and terminal for realizing networking mode switching |
| CN108737188A (en) * | 2018-05-24 | 2018-11-02 | 郑州云海信息技术有限公司 | A kind of net card failure switching system |
| CN109309674A (en) * | 2018-09-19 | 2019-02-05 | 广州市图文科技有限公司 | A kind of simple and safe practical dual net physical isolation automatic switchover technology |
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