CN114024939A - Network address allocation method and device and router - Google Patents
Network address allocation method and device and router Download PDFInfo
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- CN114024939A CN114024939A CN202111406389.6A CN202111406389A CN114024939A CN 114024939 A CN114024939 A CN 114024939A CN 202111406389 A CN202111406389 A CN 202111406389A CN 114024939 A CN114024939 A CN 114024939A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
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- H04L61/2517—Translation of Internet protocol [IP] addresses using port numbers
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Abstract
The embodiment of the invention discloses a network address allocation method, a device and a router, wherein the network address allocation method is applied to the router and comprises the following steps: sending a request for obtaining a first number of public network IP addresses to an Internet service provider; receiving the public network IP address issued by the Internet service provider; creating a bridge and allocating the public network IP address to the bridge; setting a second number of LAN interfaces as interfaces of the bridge to assign public network IP addresses to devices connected to the LAN interfaces. By directly distributing the public network IP address to the equipment connected with the local area network interface, the time delay of a data packet caused by network address conversion when the equipment accesses the Internet is avoided.
Description
Technical Field
The present invention relates to the field of network communications, and in particular, to a method and an apparatus for allocating network addresses, and a router.
Background
A router is a hardware device that connects two or more networks and functions as a gateway in the network. The router is provided with a LAN (Local Area Network) interface for connecting with the device and assigning a private Network address to the device. When accessing the internet, a device connected to a router needs to perform Network Address Translation (NAT) to convert a private Network Address of a packet into a public Network Address. However, network address translation requires forwarding of the packet and time to translate the address within the packet, increasing packet switching delays. Network address translation affects the quality of network communication, and is difficult to be applied to scenes requiring high-quality network communication, such as watching high-quality videos and playing network games.
Disclosure of Invention
In view of the defects in the prior art, embodiments of the present invention provide a method and an apparatus for assigning a network address, and a router, so as to solve the problem that network address translation is required when a device is connected to a router.
In a first aspect, an embodiment of the present application provides a network address allocation method, which is applied to a router, and the network address allocation method includes:
sending a request for obtaining a first number of public network IP addresses to an Internet service provider;
receiving the public network IP address issued by the Internet service provider;
creating a bridge and allocating the public network IP address to the bridge;
setting a second number of LAN interfaces as interfaces of the bridge to assign public network IP addresses to devices connected to the LAN interfaces, wherein the first number is greater than or equal to the second number.
With reference to the first aspect, in a first possible implementation manner, the creating a bridge, where the bridge includes a destination address, and after the creating a bridge and allocating the public network IP address to the bridge, before setting the second number of local area network interfaces as interfaces of the bridge, the creating further includes:
and setting an iptable rule corresponding to the network bridge so that the network bridge receives and transmits the data packet matched with the destination address.
With reference to the first aspect, in a second possible implementation manner, after the creating a bridge and allocating the public network IP address to the bridge, before setting the second number of lan interfaces as interfaces of the bridge, the method further includes:
and configuring the configuration file of the network bridge according to the public network IP address.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the setting the configuration file of the network bridge according to the public network IP address includes:
creating a DNS configuration file and a DHCP configuration file of the network bridge, and adding the public network IP addresses of the first number to the DNS configuration file and the DHCP configuration file.
With reference to the first aspect, in a fourth possible implementation manner, after the creating a bridge and allocating the public network IP address to the bridge, and before setting the second number of lan interfaces as interfaces of the bridge, the method further includes:
setting MAC address corresponding to each public network IP address.
With reference to the first aspect, in a fifth possible implementation manner, after the adding the second number of lan interfaces as interfaces corresponding to the bridge, the method further includes:
responding to the IP address acquisition request of the equipment, and determining each local area network interface connected with the equipment;
and distributing the public network IP address to the equipment through the local area network interface.
In a second aspect, an embodiment of the present application is a network address allocation apparatus applied to a router, the network address allocation apparatus including:
an address request module for sending a request for obtaining a first number of public network IP addresses to an Internet service provider;
the address receiving module is used for receiving the public network IP address issued by the Internet service provider;
a bridge creation module for assigning the public network IP address to the bridge;
and the interface setting module is used for setting a second number of local area network interfaces as the interfaces of the network bridge so as to distribute public network IP addresses to equipment connected with the local area network interfaces, wherein the first number is greater than or equal to the second number.
With reference to the second aspect, in a first possible implementation manner, the network bridge includes a destination address, and the apparatus further includes:
and the rule setting module is used for setting an iptable rule corresponding to the network bridge so as to enable the network bridge to receive and transmit the data packet matched with the destination address.
In a third aspect, an embodiment of the present application provides a router, including an LTE module, a processor, and a memory, where the memory stores a program or instructions, and the program or instructions are executed by the processor to cause the router to perform the steps of the network address allocation method described above.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program or instructions are stored, and the program or instructions, when executed by a processor, implement the steps of the network address allocation method described above.
The application provides a network address allocation method, which is applied to a router and comprises the following steps: sending a request for obtaining a first number of public network IP addresses to an Internet service provider; receiving the public network IP address issued by the Internet service provider; creating a bridge and allocating the public network IP address to the bridge; setting a second number of LAN interfaces as interfaces of the bridge to assign public network IP addresses to devices connected to the LAN interfaces. By directly distributing the public network IP address to the equipment connected with the local area network interface, the time delay of a data packet caused by network address conversion when the equipment accesses the Internet is avoided. Meanwhile, only public network IP addresses are allocated to the devices, so that the devices with the number not exceeding the second number can directly access the Internet, the bandwidth of the router is prevented from being occupied by other devices, and the network communication quality is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a flowchart illustrating a network address assignment method according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram illustrating a scenario of connection between a router and a device according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram illustrating a network address assignment device according to embodiment 2 of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Referring to fig. 1, fig. 1 is a flowchart illustrating a network address allocation method according to embodiment 1 of the present invention, where the network address allocation method in fig. 1 is applied to a router, and the network address allocation method includes the following steps:
It should be understood that an IP (Internet Protocol Address) Address is a uniform Address format for masking a difference of physical addresses. The public network IP address is an unreserved address on the WAN connected to the Internet, and equipment of the WAN and other equipment on the Internet can freely access each other. The IP address used in the local area network becomes a private network IP address, and the private network IP address needs to be converted into a public network IP address through an NAT technology to access the Internet.
Internet Service Providers (ISPs) typically provide a router with a public network IP address. In this application, the router sends a request for obtaining a first number of public network IP addresses to the internet service provider to obtain a plurality of public network IP addresses, where the first number is set according to an actual requirement, and is not limited herein.
And 102, receiving the public network IP address issued by the Internet service provider.
In this embodiment, the router sends a request for obtaining 8 public network IP addresses to an internet service provider. The internet service provider issues an address block comprising 8 public network IP addresses, wherein the address block is used to divide the local area network of the router into one subnet. The router distributes 8 public network IP addresses issued by the Internet service provider to the equipment connected with the router.
A bridge is a technology for forwarding signal frames, and is used to interconnect two or more LANs into one LAN or divide one LAN into a plurality of IP segments. Specifically, the bridge divides the LAN of the router into 8 IP segments, and binds each IP segment to a public network IP address. And if the network bridge receives a data packet containing the bound public network IP address in the data packet, forwarding the data packet to an IP network segment corresponding to the public network IP address. If the network bridge receives the data packet which does not contain the bound public network IP address in the data packet, the received data packet is abandoned, and illegal access of users in other IP network segments is avoided.
As an example, after the bridge includes a destination address, and after the creating the bridge and assigning the public network IP address to the bridge, and before the setting the second number of lan interfaces as interfaces of the bridge, further comprising:
and setting an iptable rule corresponding to the network bridge so that the network bridge receives and transmits the data packet matched with the destination address.
The iptable is a network protection wall and is used for matching and checking messages entering and exiting a local area or a network. The router is provided with an iptable rule corresponding to the network bridge, and the network bridge is allowed to receive and transmit the data packet matched with the destination address. In the process of receiving and transmitting data by the network bridge, the network address switching of the data packet is not needed. Specifically, if the data packet received by the bridge includes the destination address of the bridge, the data packet is forwarded to the next network node through the bridge. If the data packet received by the network bridge does not contain the destination address of the network bridge, the received data packet is discarded.
As an example, after the creating a bridge and assigning the public network IP address to the bridge, and before the setting the second number of lan interfaces as the interfaces of the bridge, the method further includes:
and configuring the configuration file of the network bridge according to the public network IP address.
The configuration file is used to configure initial parameters of the router. The configuration file for the bridge is configured to enable the router to identify the created bridge and associate a physical ethernet port for the bridge.
In an optional example, the setting the configuration file of the bridge according to the public network IP address includes:
creating a DNS configuration file and a DHCP configuration file of the network bridge, and adding the public network IP addresses of the first number to the DNS configuration file and the DHCP configuration file.
The DNS (Domain name resolution) configuration file includes configuration information of the virtual ethernet interface of the router, that is, configuration information of the bridge. When a device is connected to the physical ethernet port associated with the bridge, the router assigns a public network IP address to the device via the physical ethernet port.
The DHCP (Dynamic Host Configuration Protocol) is a network Protocol of a local area network, and the router uploads a public network IP to a DHCP server, and manages and allocates a public network IP address through the DHCP server. When the equipment is connected with the router through the local area network interface, the equipment sends an IP address acquisition request to the DHCP server, and the DHCP server distributes one public network IP address to the equipment through the local area network interface. Meanwhile, if a plurality of devices are connected with the router, the public network IP address is distributed through the DHCP server, and the fault caused by the fact that the same public network IP address is repeatedly distributed to more than two devices is avoided.
As an example, after the creating a bridge and assigning the public network IP address to the bridge, and before the setting the second number of lan interfaces as the interfaces of the bridge, the method further includes:
setting MAC address corresponding to each public network IP address.
The MAC (Media Access Control) address is used to identify the device. For example, assume that a first MAC address is set for a first public network IP address and a second MAC address is set for a second public network IP address. And if the router receives a data packet sent by the Internet and determines that the data packet contains the first MAC address, forwarding the data packet to a network node belonging to the first public network IP address. And the MAC address corresponding to each public network IP address is set, so that the data packet is prevented from being wrongly forwarded.
In particular, assume that the router includes two local area network interfaces. If the first local area network interface is required to be set as an interface which does not need to be switched by network addresses, the first local area network interface is set as an interface of the network bridge, and the network bridge allocates one public network IP address to the first local area network interface. The public network IP address is distributed to the equipment through the first local area network interface, so that the equipment can directly access the Internet, the time delay generated by network address conversion is avoided, and the quality of network communication is improved. Meanwhile, the network bridge does not allocate the public network IP address to the second local area network interface, and even if the equipment is connected with the second local area network interface, the public network IP address allocated by the router cannot be obtained, and the equipment cannot directly access the Internet.
It should be understood that the router may be further configured to allocate no private network IP address to the device connected to the router, and allocate only a public network IP address to the device, so that the device with no more than a second number directly accesses the internet, thereby avoiding the bandwidth of the router being occupied by other devices and improving the network communication quality.
It should be understood that the second number is set according to actual requirements, and the second number is smaller than or equal to the first number, and is not limited herein.
As an example, after adding the second number of lan interfaces as interfaces corresponding to the bridge, the method further includes:
responding to the IP address acquisition request of the equipment, and determining each local area network interface connected with the equipment;
and distributing the public network IP address to the equipment through the local area network interface.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a scenario of connection between a router and a device according to embodiment 1 of the present invention. Device 220 is configured to dynamically obtain an IP address and connect to router 210 through lan interface 211. The router 210 assigns a public network IP address to the device 220 through the lan interface 211 in response to the IP address acquisition request of the device 220 so that the device 220 can directly access the Internet.
It should be understood that the router 210 can be configured to only allow devices 220 assigned public network IP addresses to access the Internet. When the router 210 receives 8 public network addresses, at most 8 devices 220 connected with the router 210 through the local area network interface 211 are allowed to access the Internet, so that the occupied bandwidth of the router 210 is avoided, and the quality of network communication when the devices 220 access the Internet is improved.
The application provides a network address allocation method, which is applied to a router and comprises the following steps: sending a request for obtaining a first number of public network IP addresses to an Internet service provider; receiving the public network IP address issued by the Internet service provider; creating a bridge and allocating the public network IP address to the bridge; setting a second number of LAN interfaces as interfaces of the bridge to assign public network IP addresses to devices connected to the LAN interfaces. By directly distributing the public network IP address to the equipment connected with the local area network interface, the time delay of a data packet caused by network address conversion when the equipment accesses the Internet is avoided. Meanwhile, only public network IP addresses are allocated to the devices, so that the devices with the number not exceeding the second number can directly access the Internet, the bandwidth of the router is prevented from being occupied by other devices, and the network communication quality is improved.
Example 2
Referring to fig. 3, fig. 3 is a schematic structural diagram illustrating a network address assignment device according to embodiment 2 of the present invention, where the network address assignment device 300 in fig. 3 is applied to a router, and includes:
an address request module 310, configured to send a request for obtaining a first number of public network IP addresses to an internet service provider;
an address receiving module 320, configured to receive the public network IP address issued by the internet service provider;
a bridge creation module 330, configured to assign the public network IP address to the bridge;
an interface setting module 340, configured to set a second number of lan interfaces as interfaces of the bridge, so as to allocate public network IP addresses to devices connected to the lan interfaces, where the first number is greater than or equal to the second number.
As an example, the bridge includes a destination address, and the network address allocating apparatus 300 further includes:
and the rule setting module is used for setting an iptable rule corresponding to the network bridge so as to enable the network bridge to receive and transmit the data packet matched with the destination address.
As an example, the network address allocating apparatus 300 further includes:
and the file configuration module is used for configuring the configuration file of the network bridge according to the public network IP address.
As an example, the configuration file includes a DNS configuration file and a DHCP configuration file, and the file configuration module is further configured to create a DNS configuration file and a DHCP configuration file of the bridge, and add the first number of public network IP addresses to the DNS configuration file and the DHCP configuration file.
As an example, the network address allocating apparatus 300 further includes:
and the MAC address setting module is used for setting the MAC address corresponding to each public network IP address.
As an example, the network address allocating apparatus 300 further includes:
a request response module, configured to respond to an IP address acquisition request of the device, and determine each local area network interface connected to the device;
and the address distribution module is used for distributing the public network IP address to the equipment through the local area network interface.
The network address allocation apparatus 300 is configured to perform corresponding steps in the network address allocation method, and specific implementations of various functions are not described one by one here. In addition, the alternative example in embodiment 1 is also applied to the network address assigning apparatus 300 of embodiment 2.
The embodiment of the present application further provides a router, which includes an LTE module, a processor, and a memory, where the memory stores a program or an instruction, and the program or the instruction is executed by the processor, so that the router executes the steps of the network address allocation method.
An embodiment of the present application further provides a computer-readable storage medium, where a program or an instruction is stored on the computer-readable storage medium, and when the program or the instruction is executed by a processor, the method implements the steps of the network address allocation method described above.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A network address allocation method is applied to a router, and the method comprises the following steps:
sending a request for obtaining a first number of public network IP addresses to an Internet service provider;
receiving the public network IP address issued by the Internet service provider;
creating a bridge and allocating the public network IP address to the bridge;
setting a second number of LAN interfaces as interfaces of the bridge to assign public network IP addresses to devices connected to the LAN interfaces, wherein the first number is greater than or equal to the second number.
2. The method of claim 1, wherein the bridge includes a destination address, wherein after the creating the bridge and assigning the public network IP address to the bridge, and before the setting the second number of lan interfaces as the bridge's interfaces, further comprising:
and setting an iptable rule corresponding to the network bridge so that the network bridge receives and transmits the data packet matched with the destination address.
3. The method of claim 1, wherein after creating a bridge and assigning the public network IP address to the bridge, and before setting the second number of lan interfaces as the interfaces for the bridge, further comprising:
and configuring the configuration file of the network bridge according to the public network IP address.
4. The method according to claim 3, wherein the configuration file comprises a DNS configuration file and a DHCP configuration file, and the setting the configuration file of the bridge according to the public network IP address comprises:
creating a DNS configuration file and a DHCP configuration file of the network bridge, and adding the public network IP addresses of the first number to the DNS configuration file and the DHCP configuration file.
5. The method of claim 1, wherein after creating a bridge and assigning the public network IP address to the bridge, and before setting the second number of lan interfaces as the interfaces for the bridge, further comprising:
setting MAC address corresponding to each public network IP address.
6. The method of claim 1, wherein after adding the second number of lan interfaces as interfaces corresponding to the bridge, further comprising:
responding to the IP address acquisition request of the equipment, and determining each local area network interface connected with the equipment;
and distributing the public network IP address to the equipment through the local area network interface.
7. A network address assignment device applied to a router, the device comprising:
an address request module for sending a request for obtaining a first number of public network IP addresses to an Internet service provider;
the address receiving module is used for receiving the public network IP address issued by the Internet service provider;
a bridge creation module for assigning the public network IP address to the bridge;
and the interface setting module is used for setting a second number of local area network interfaces as the interfaces of the network bridge so as to distribute public network IP addresses to equipment connected with the local area network interfaces, wherein the first number is greater than or equal to the second number.
8. The apparatus of claim 7, wherein the bridge includes a destination address, the apparatus further comprising:
and the rule setting module is used for setting an iptable rule corresponding to the network bridge so as to enable the network bridge to receive and transmit the data packet matched with the destination address.
9. A router comprising an LTE module, a processor and a memory, the memory having stored thereon a program or instructions which, when executed by the processor, carry out the steps of the network address assignment method of any of claims 1 to 6.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the network address allocation method according to any one of claims 1 to 6.
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