CN113382023A - Method and system for cross-network supervision of private network - Google Patents
Method and system for cross-network supervision of private network Download PDFInfo
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- CN113382023A CN113382023A CN202110922638.0A CN202110922638A CN113382023A CN 113382023 A CN113382023 A CN 113382023A CN 202110922638 A CN202110922638 A CN 202110922638A CN 113382023 A CN113382023 A CN 113382023A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
Abstract
The invention discloses a method and a system for cross-network supervision of a private network, belonging to the technical field of communication, wherein the method comprises the following steps: connecting the private network server to a serial server through a serial port; connecting the serial server to a monitoring server through Ethernet; the private network server communicates with the supervision server through a non-transparent communication protocol. The serial server plays a role of network connection on one hand, and plays a more main role of protocol conversion on the other hand, namely the conversion between the UART communication protocol of the serial port and the Ethernet protocol. Protocol conversion enables a firm city wall to be constructed on penetration of programs such as viruses and trojans on the Ethernet and intrusion prevention of hackers; and the non-transparent communication protocol ensures that only white-list specified data or format data is allowed to be exchanged between the private network server and the supervision server, and the combination of the two is equivalent to providing the system with approximately physically isolated security.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system for cross-network supervision of a private network.
Background
In the field of computer communication, network operation and maintenance is an important work for guaranteeing reliable operation of a system, and ordinary network operation and maintenance mainly refers to inspection of a platform server, such as viewing: CPU occupancy rate, CPU temperature, memory usage, hard disk space, whether an application service process is running normally, whether an abnormal process occurs, whether a log file is generated every day, whether connection with a specified network is smooth, and the like. Daily routing inspection is helpful for timely finding hidden troubles and faults of a server and a network, but people have limited energy, many faults are often found only by user repair after influencing services, and the delay is serious, so that many units use a server network management platform for monitoring.
A Private Network (Private Network) is a professional Network that provides security and reliability for a specific department or group, such as government affairs, medical and public security industries, and is generally constructed independently and isolated from other networks in order to improve data security. For example, a private network is isolated from a public network, and one private network platform is isolated from another private network platform. It is usually necessary to configure a set of monitoring servers for each private network. On the one hand, the input cost is greatly increased, and on the other hand, the operation and maintenance workload of the monitoring server is also increased.
In the prior art, a set of monitoring system is adopted to monitor a plurality of private networks, and different private networks are isolated in a firewall manner. But the firewall is easily broken and the security is worried. At present, the requirement on information security is higher and higher, and under the situation that the internet network security is more and more severe, the isolation requirement of a private network cannot be met by a firewall-dependent mode.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method and a system for cross-network supervision of a private network, which convert and transmit communication protocols through a serial server to achieve the isolation effect, thereby improving the security of the supervision and isolation of the private network.
The invention discloses a method for cross-network supervision of a private network, which comprises the following steps: connecting the private network server to a serial server through a serial port; connecting the serial server to a monitoring server through Ethernet; the private network server communicates with the supervision server through a non-transparent communication protocol.
Preferably, the method for the supervision server to send the monitoring data request comprises the following steps:
the supervision server sends a data request to the private network server through the IP address and the TCP port number;
the serial server performs protocol conversion on the data request;
after the protocol conversion, the serial server forwards a data request to a corresponding private network server through a serial port;
responding to the received data request, and sending the monitoring data to a serial port server by the private network server through a serial port;
and the serial port server performs protocol conversion on the monitoring data and then sends the monitoring data to the monitoring server through the Ethernet.
Preferably, the method for actively reporting the monitoring data by the private network server comprises the following steps:
judging whether the monitoring data of the private network server is abnormal or not;
if so, the private network server sends the monitoring data to a serial server through a serial port;
and after the protocol conversion is carried out on the monitoring data by the serial port server, the monitoring data is forwarded to the monitoring server through the Ethernet.
Preferably, the method of the present invention further comprises a method for establishing a connection between the private network server and the supervision server:
configuring serial ports of the butt joint of the private network server and the serial port server into the same transmission parameters;
setting the serial server into a client mode, setting a target IP into an IP and a port number of a supervision server, and operating supervision software of the supervision server in a TCP server mode;
the serial server sends a connection request through the Ethernet;
after receiving the connection request, the supervision server establishes TCP/IP connection with the serial port server;
the monitoring server and the private network server are in data communication, and protocol conversion is carried out through the serial server.
Preferably, the method of the present invention further comprises a cross-network supervision method of multiple private networks:
connecting each private network server of a plurality of private networks to a serial server;
the serial server is connected to the supervision server through the switch.
Preferably, the method of the present invention further comprises an alarm method:
and when monitoring that the private network server is abnormal, the supervision server sends alarm information to a manager.
Preferably, the method of the present invention further comprises a method of agreeing on a data format by the non-transparent communication protocol:
presetting a data white list, wherein the white list comprises a data format and a data inherent character string;
data that does not conform to the white list is discarded.
The invention also provides a system for realizing the private network cross-network supervision method, which comprises a private network server, a serial server and a supervision server, wherein the private network server is connected with a serial port end of the serial server through a serial port; the network end of the serial port server is connected with the supervision server through the Ethernet; the private network server communicates with the supervision server through a non-transparent communication protocol.
Preferably, the supervision server is provided with a supervision module, the private network server is provided with a monitoring module,
the monitoring module is used for sending a data request to the serial server;
the serial server is provided with a communication module, and the communication module is used for protocol conversion of data requests or monitoring data;
after the protocol conversion, the serial server forwards a data request to a corresponding private network server through a serial port;
the monitoring module is used for monitoring the private network server, acquiring monitoring data and sending the monitoring data to the communication module of the serial server through the serial port;
and the serial port server is also used for forwarding the monitoring data after the protocol conversion to the monitoring server.
Preferably, the monitoring module and the supervision module respectively filter the data request and the monitoring data according to a data white list preset by the non-transparent transmission communication protocol.
Compared with the prior art, the invention has the beneficial effects that: the serial server plays a role in network connection on one hand, and plays a more main role in protocol conversion on the other hand, namely, the conversion is carried out between a UART communication protocol of a serial port and an Ethernet protocol, and the protocol conversion enables a firm city wall to be constructed on the penetration of programs such as viruses and trojans on the Ethernet and the intrusion prevention of hackers; and the non-transparent communication protocol ensures that only white-list specified data or format data is allowed to be exchanged between the private network server and the supervision server, and the combination of the two is equivalent to providing the system with approximately physically isolated security.
Drawings
FIG. 1 is a flow chart of a method of cross-network policing of a private network of the present invention;
FIG. 2 is a supervision network topology diagram of embodiment 1;
FIG. 3 is a supervision network topology diagram of embodiment 2;
FIG. 4 is a supervision network topology diagram of embodiment 3;
FIG. 5 is a logical block diagram of the system of the present invention;
FIG. 6 is a serial server port diagram.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is described in further detail below with reference to the attached drawing figures:
a method for cross-network supervision of a private network, as shown in fig. 1, the method comprising:
step 101: and connecting the private network server to a serial server through a serial port. A plurality of interconnected servers are usually provided in the private network, and a serial port is usually preset in the server. The serial server is used for providing a serial port-to-network function and converting an RS-232/485/422 serial port into an RJ45 interface of a TCP/IP protocol. Specifically, the serial port of the serial server adopts a UART serial port protocol, and the network end adopts a TCP/IP protocol and is used for protocol conversion, but the protocol of the ethernet is not limited thereto, and protocols such as UDP can also be adopted.
Step 102: and connecting the serial port server to the supervision server through the Ethernet. Namely, the serial server is connected with the supervision server through a TCP/IP protocol.
Step 103: the private network server communicates with the supervision server through a non-transparent communication protocol.
The non-transparent transmission communication protocol can follow the UART communication protocol of the serial port, and the serial server plays a role in connection on one hand and plays a more main role in protocol conversion on the other hand, namely the conversion between the UART communication protocol of the serial port and the Ethernet protocol. Protocol conversion enables a firm city wall to be constructed on penetration of programs such as viruses and trojans on the Ethernet and intrusion prevention of hackers; and the non-transparent communication protocol ensures that only white-list specified data or format data is allowed to be exchanged between the private network server and the supervision server, and the combination of the two is equivalent to providing the system with approximately physically isolated security.
TCP/IP is one of the major protocols for the Ethernet protocol. Hackers may exploit bugs of the operating system, middleware or applications, and may break into if the operating system, middleware or applications have known vulnerabilities. The serial server has a single structure and function, and the possibility of leakage is far less than that of a complex system. Even if the serial server is invaded, no known virus exists at present and can enter from a TCP/IP protocol and infect the private network server through the serial UART protocol because the serial server and the private network server communicate by using the non-transparent communication protocol based on the serial UART protocol.
Therefore, the non-transparent communication protocol has strong capability of resisting hacker intrusion. In a specific embodiment, in the non-transparent transmission dedicated communication protocol, a privatized definition is performed on data, and the transmitted data is required to be monitoring information such as temperature and humidity, and a control instruction is not allowed to be transmitted. On one hand, a hacker does not know the privatized data format, on the other hand, even if the hacker knows the privatized data format, the hacker only can make false alarm of the data, and the private network equipment cannot be controlled through the data. Namely, the data format is agreed by the non-transparent transmission communication protocol: presetting a data white list, wherein the white list comprises a data format and a data inherent character string, and for example, the data which is appointed to be sent must be monitoring information such as temperature, humidity and the like; data that does not conform to the white list is discarded, e.g., control instructions, files, etc., are discarded without being transmitted.
The method for the supervision server to send the monitoring data request comprises the following steps:
step 201: and the supervision server sends a data request to the private network server through the IP address and the TCP port number. The request information passes through the serial server, the TCP port number of the serial server and the serial port establish a one-to-one correspondence, and the serial port of the serial server is directly connected with the private network server, namely the TCP port number and the private network server are in one-to-one correspondence.
Step 202: and the serial server performs protocol conversion on the data request.
Step 203: after the protocol conversion, the serial server forwards the data request to the corresponding private network server through the serial port.
Step 204: and responding to the received data request, and sending the monitoring data to a serial server by the private network server through a serial port. The monitoring data may be the monitoring data of the current private network server, or the monitoring data collected from other private network servers in the same private network. And when receiving the data request, the private network server filters the data request according to the non-transparent transmission communication protocol.
Step 205: and the serial port server performs protocol conversion on the monitoring data and then sends the monitoring data to the monitoring server through the Ethernet.
The method for actively reporting the monitoring data by the private network server comprises the following steps:
step 301: and judging whether the monitoring data of the private network server is abnormal or not.
If yes, go to step 302: the private network server sends the monitoring data to the serial server through the serial port. For example, the private network server may report the monitoring data to the monitoring server actively at intervals of 5 minutes, so as to avoid the situation that the load of the monitoring server changes excessively due to the disordered active reporting of the private network server, and the like, and often only when the private network server finds abnormal data or an emergency, the monitoring server reports the monitoring data to the monitoring server actively.
Step 303: and after the protocol conversion is carried out on the monitoring data by the serial port server, the monitoring data is forwarded to the monitoring server through the Ethernet.
Step 304: and the supervision server filters the monitoring data according to the non-transparent communication protocol and then processes the data to realize monitoring of the private network.
The invention also comprises an alarm method:
and when monitoring that the private network server is abnormal, the supervision server sends alarm information to a manager. A threshold value can be preset for the monitoring parameter, and when the parameter exceeds the limit, the server is judged to be abnormal. The monitoring server can be connected to the internet and sends the alarm information in a mailbox, short message or instant message mode.
The invention also provides a system for implementing the private network cross-network supervision method, as shown in fig. 5, comprising a private network server 11, a serial server 2 and a supervision server 3,
the private network server 11 is connected with a serial port end of the serial port server 2 through a serial port;
the network end of the serial server 2 is connected with the monitoring server 3 through the Ethernet;
the private network server 11 communicates with the supervision server 3 through a non-transparent communication protocol.
Preferably, the supervision server 3 is provided with a supervision module 31, the private network server 11 is provided with a monitoring module 12,
the supervision module 31 is configured to send a data request to the serial server 2;
the serial server 2 is provided with a communication module 21, and the communication module 21 is used for protocol conversion of data requests or monitoring data; after the protocol conversion, the serial server forwards a data request to a corresponding private network server through a serial port;
the monitoring module 12 is used for monitoring the private network server 11, obtaining monitoring data and sending the monitoring data to the communication module 21 of the serial server 2 through a serial port; the serial server 2 is further configured to send the monitoring data after the protocol conversion to the monitoring server 3.
The monitoring module 12 and the supervision module 31 respectively filter the data request and the monitoring data according to a data white list preset by the non-transparent transmission communication protocol.
Example 1
Fig. 2 shows a supervision network topology, wherein serial ports of a private network server X, a private network server Y and a private network server Z are respectively connected to different serial ports of a serial port server, and the serial port server is connected to a supervision server through an ethernet. The private network server and the supervision server communicate through a non-transparent communication protocol.
The private network server X, the private network server Y and the private network server Z can be in the same private network or different private networks.
The method for establishing the connection between the private network server and the supervision server comprises the following steps:
step 401: the serial ports of the private network server and the serial port server are configured to be identical in transmission parameters, such as baud rate, start bit, stop bit, verification method, transmission bit number and the like.
Step 402: and setting the serial server to be in a client mode, setting the IP of the target server to be the IP and the port number of the supervision server, and operating supervision software of the supervision server in a TCP server mode.
Step 403: and the serial server sends a connection request through the Ethernet.
Step 404: after receiving the connection request, the supervisory software of the supervisory server establishes TCP/IP connection with the serial server. Other private network servers are also connected to the supervision server through the serial server to establish TCP/IP connection, so that the TCP/IP connection between the supervision server and the plurality of private network servers is realized.
Step 405: after TCP/IP connection is established, data communication can be carried out between the supervision server and the private network server, and all data reach an opposite end after protocol conversion due to protocol conversion of the serial server in the middle, so that penetration of programs such as viruses and trojans on the Ethernet and invasion of hackers are effectively prevented.
As shown in fig. 6, the TCP port number of the serial server corresponds to the private network server connected to the serial port one by one, that is, the connection between the monitoring server and the private network server is realized through TCP/IP connection. A 12001 port of the serial port server IP1 applies for TCP connection to a 22001 port of the supervision server IP 2; after the monitoring server detects the application from the 12001 port at the 22001 port, a TCP/IP channel between the monitoring server and the 12001 port of the serial port server is established; because the serial port 1 corresponding to the 12001 port of the serial server is directly connected with the private network server X, all data of the private network server X through the serial port are transmitted to the 22001 port of the supervision server through the 12001 port after being converted by the protocol of the serial server. Similarly, the data sent to the 12001 port of the serial server by the supervisory server also reaches the private network server X through the serial port 1 after being converted by the serial server protocol. So it can be seen that: the communication between the private network server and the supervision server is not direct Ethernet communication, and is achieved by protocol conversion and a physical link between serial ports. The private network server only transmits and receives information to and from the local serial port number (such as COM 1) and is relayed by the serial port server.
The method for establishing the connection between the private network server and the supervision server is not limited to the client mode, and if the serial server is set to be in a TCP (transmission control protocol) server mode, a UDP (user datagram protocol) mode and the like, networking with high isolation level can be realized, but the execution efficiency is lower than that of the client mode or the programming is more complex.
Example 2
Fig. 3 shows a second type of supervisory network topology with multiple private networks: the server A, the server B and the server N form a first private network; the server I, the server II and the server X form a second private network; server 1, server 2 and server 3 form a third private network.
The server of the first private network is respectively connected with different serial ports of the serial server a, and the serial server a is connected with the monitoring server through the Ethernet. The server of the second private network is respectively connected with different serial ports of the serial server b, and the serial server b is connected with the monitoring server through the Ethernet. And the server of the third private network is respectively connected with different serial ports of the serial server c, and the serial server c is connected with the monitoring server through the Ethernet.
But not limited thereto, for example, the server 1 of the third private network is connected to the serial server c, and the server 1 is configured to obtain monitoring information of each server of the third private network and report the monitoring information to the monitoring server through the serial server c.
Example 3
In the broadcast television network application, 3 private networks are arranged: a call center network, an NVOD broadcast network and an emergency broadcast network.
The call center network is connected with a provincial network and is connected with a county area network, the private network is provided with 2 recording servers and 10 terminal computers, wherein the 2 recording servers need to be monitored, and the monitoring parameters need to be additionally monitored, such as whether the recording servers are communicated with the provincial network server, whether the latest recording file is generated and the like besides the conventional CPU temperature, CPU occupancy rate, memory occupancy rate, hard disk remaining space, whether a designated process is started or not, whether an abnormal process runs or not and the like.
The NVOD network comprises a main broadcast control server, a main dispatch server, a main video server and other servers, and 8 special network servers need to be monitored.
The emergency broadcast network comprises an instruction server, a transcoding server, an industrial personal computer and the like, 6 special network servers need to monitor, a Windows operating system and a Linux operating system.
The three private networks are physically isolated independent networks. As shown in fig. 4, each server of each private network is individually connected to a nearby serial server through an RS232 serial port, an ethernet interface of each serial server is connected to a switch through a network cable or a wireless network, and a supervision server is also connected to the switch.
The method comprises the steps that a resident program (namely a monitoring module) is installed on each server to be monitored in each private network, the resident program of the system is divided into two versions of Windows and Linux, data are received and sent according to the requirements of a non-transparent communication protocol, and some specific monitoring contents are configured or customized, such as the connectivity of a call center network timing test and a provincial network server communication, the IP address of the provincial network server needs to be configured, the test frequency is high, the packet loss rate is allowed, and the like; and whether the monitoring of the latest recording file exists needs to judge whether the creation of a new folder is successful every morning (the folder is not successfully created and the recording fault of the day does not exist once), so the personalized monitoring needs to be customized.
The network management software (namely a supervision module) of the supervision server sends out polling every 5 minutes (can be set), each private network server returns a result according to the requirements of the non-transparent transmission communication protocol after receiving the compliance information, and the supervision server gives an alarm for the out-of-limit parameters; in addition, important monitoring parameters can be configured into Trap events in advance, and the Trap events are reported actively through the private network server, so that the private network server can report the parameters to the monitoring server actively when the parameters are abnormal, and the timeliness requirement is met.
According to the embodiment, the network with the network management is established through the serial ports, information transmission is carried out according to the non-transparent transmission special communication protocol, the isolation between private networks is effectively guaranteed, the requirement of remote scale supervision is met, and the method has popularization value.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for cross-network supervision of a private network, the method comprising:
connecting the private network server to a serial server through a serial port;
connecting the serial server to a monitoring server through Ethernet;
the private network server communicates with the supervision server through a non-transparent communication protocol.
2. The private network supervision method according to claim 1, wherein the method for the supervision server to send the monitoring data request comprises:
the supervision server sends a data request to the private network server through the IP address and the TCP port number;
the serial server performs protocol conversion on the data request;
after the protocol conversion, the serial server forwards a data request to a corresponding private network server through a serial port;
responding to the received data request, and sending the monitoring data to a serial port server by the private network server through a serial port;
and the serial port server performs protocol conversion on the monitoring data and then sends the monitoring data to the monitoring server through the Ethernet.
3. The method for supervising the private network according to claim 1, wherein the private network server has a method for actively reporting the monitoring data:
judging whether the monitoring data of the private network server is abnormal or not;
if so, the private network server sends the monitoring data to a serial server through a serial port;
and after the protocol conversion is carried out on the monitoring data by the serial port server, the monitoring data is forwarded to the monitoring server through the Ethernet.
4. The method for private network supervision according to claim 1, further comprising a method for private network server to establish connection with the supervision server:
configuring serial ports of the butt joint of the private network server and the serial port server into the same transmission parameters;
setting the serial server into a client mode, setting a target IP into an IP and a port number of a supervision server, and operating supervision software of the supervision server in a TCP server mode;
the serial server sends a connection request through the Ethernet;
after receiving the connection request, the supervision server establishes TCP/IP connection with the serial port server;
the monitoring server and the private network server are in data communication, and protocol conversion is carried out through the serial server.
5. The method of claim 1, further comprising a cross-network policing method for multiple private networks:
connecting each private network server of a plurality of private networks to a serial server;
the serial server is connected to the supervision server through the switch.
6. The method for supervising a private network according to claim 1, further comprising a method for alarming:
and when monitoring that the private network server is abnormal, the supervision server sends alarm information to a manager.
7. The method of claim 1, further comprising the step of agreeing on the data format via a non-transparent communication protocol:
presetting a data white list, wherein the white list comprises a data format and a data inherent character string;
data that does not conform to the white list is discarded.
8. A system for implementing the private network cross-network supervision method according to any one of claims 1 to 7, comprising a private network server, a serial server and a supervision server,
the private network server is connected with a serial port end of the serial port server through a serial port;
the network end of the serial port server is connected with the supervision server through the Ethernet;
the private network server communicates with the supervision server through a non-transparent communication protocol.
9. The system of claim 8, wherein the administration server is provided with an administration module, the private network server is provided with a monitoring module,
the monitoring module is used for sending a data request to the serial server;
the serial server is provided with a communication module, and the communication module is used for protocol conversion of data requests or monitoring data;
after the protocol conversion, the serial server forwards a data request to a corresponding private network server through a serial port;
the monitoring module is used for monitoring the private network server, acquiring monitoring data and sending the monitoring data to the communication module of the serial server through the serial port;
and the serial port server is also used for forwarding the monitoring data after the protocol conversion to the monitoring server.
10. The system of claim 9, wherein the monitoring module and the supervision module respectively filter the data request and the monitoring data according to a data white list preset by the non-transparent communication protocol.
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| CN115002811A (en) * | 2022-08-01 | 2022-09-02 | 阿里巴巴达摩院(杭州)科技有限公司 | Private network control method, data processing method, equipment control method and equipment |
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