CN106411882B - Method and device for accessing client to network - Google Patents
Method and device for accessing client to network Download PDFInfo
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- CN106411882B CN106411882B CN201610858462.6A CN201610858462A CN106411882B CN 106411882 B CN106411882 B CN 106411882B CN 201610858462 A CN201610858462 A CN 201610858462A CN 106411882 B CN106411882 B CN 106411882B
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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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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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
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Small-Scale Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The embodiment of the invention discloses a method and a device for accessing a client to a network, which relate to the technical field of Internet and are applied to AC (access controller), wherein the method comprises the following steps: acquiring an IP address of a client; detecting whether the IP address is a dynamic IP address; if yes, allowing the client to access the network; and if not, rejecting the client to access the network. By applying the embodiment of the invention, the normal use of the legal client to the network is ensured, and unnecessary loss and potential safety hazards to the legal client are avoided.
Description
Technical Field
The present invention relates to the field of internet technologies, and in particular, to a method and an apparatus for accessing a client to a network.
Background
When a client accesses a network through an Access Controller (AC), the AC needs to authenticate the client according to an Internet Protocol (IP) address of the client, and the client is allowed to Access the network after the authentication is passed.
Currently, IP addresses are divided into dynamic IP addresses and static IP addresses. The Dynamic IP address is generally allocated by a DHCP server (Dynamic Host configuration protocol), and the problem of the same IP address is not generated; the static IP address is generally provided by a network operator and is fixed, so that the static IP address of a legal client is easily stolen illegally, which not only affects normal use of the network by the legal client, but also causes unnecessary loss and potential safety hazard to the legal client.
Disclosure of Invention
The embodiment of the invention discloses a method and a device for accessing a client to a network, which are used for ensuring the normal use of a legal client to the network and avoiding unnecessary loss and potential safety hazards to the legal client.
In order to achieve the above object, an embodiment of the present invention discloses a method for accessing a client to a network, which is applied to an AC, and the method includes:
acquiring an IP address of a client;
detecting whether the IP address is a dynamic IP address;
if yes, allowing the client to access the network;
and if not, rejecting the client to access the network.
In an embodiment of the present invention, the step of detecting whether the IP address is a dynamic IP address includes:
detecting whether a DHCP server is configured locally;
if yes, detecting whether the IP address is an IP address distributed by a local DHCP server;
if the address is the IP address distributed by the local DHCP server, determining the IP address as a dynamic IP address;
and if the IP address is not the IP address allocated by the local DHCP server, determining that the IP address is not a dynamic IP address.
In an embodiment of the present invention, when detecting that the DHCP server is not configured locally, or when the IP address is not an IP address assigned by the local DHCP server, the method further includes:
detecting whether the IP address is an IP address allocated by other DHCP servers connected with the AC;
if so, determining the IP address as a dynamic IP address;
if not, determining that the IP address is not a dynamic IP address.
In an embodiment of the present invention, the step of detecting whether the IP address is an IP address allocated by another DHCP server of the AC connection includes:
sending a query message to other DHCP servers connected with the AC, wherein the query message comprises the IP address;
receiving query response messages fed back by the other DHCP servers according to the query messages;
and determining whether the IP address is the IP address allocated by the other DHCP servers or not according to the query response message.
In an embodiment of the present invention, the step of detecting whether the IP address is a dynamic IP address includes:
when the detection function is enabled, detecting whether the IP address is a dynamic IP address;
the method further comprises the following steps:
when the detection function is not enabled, the step of allowing the client to access the network is performed after the step of obtaining the IP address of the client.
In order to achieve the above object, an embodiment of the present invention further discloses a device for accessing a client to a network, which is applied to an AC, and the device includes:
the acquiring unit is used for acquiring the IP address of the client;
the detection unit is used for detecting whether the IP address is a dynamic IP address;
an allowing unit, configured to allow the client to access a network if a detection result of the detecting unit is yes;
and the rejecting unit is used for rejecting the client to access the network under the condition that the detection result of the detecting unit is negative.
In an embodiment of the present invention, the detection unit is specifically configured to:
detecting whether a DHCP server is configured locally; if yes, detecting whether the IP address is an IP address distributed by a local DHCP server; if the address is the IP address distributed by the local DHCP server, determining the IP address as a dynamic IP address; and if the IP address is not the IP address allocated by the local DHCP server, determining that the IP address is not a dynamic IP address.
In an embodiment of the present invention, the detecting unit is further configured to:
when detecting that a DHCP server is not configured locally or when the IP address is not the IP address allocated by the local DHCP server, detecting whether the IP address is the IP address allocated by other DHCP servers of the AC connection; if so, determining the IP address as a dynamic IP address; if not, determining that the IP address is not a dynamic IP address.
In an embodiment of the present invention, the detection unit is specifically configured to:
sending a query message to other DHCP servers connected with the AC, wherein the query message comprises the IP address;
receiving query response messages fed back by the other DHCP servers according to the query messages;
and determining whether the IP address is the IP address allocated by the other DHCP servers or not according to the query response message.
In an embodiment of the present invention, the detection unit is specifically configured to:
when the detection function is enabled, detecting whether the IP address is a dynamic IP address;
the allowing unit is further configured to allow the client to access a network when the detecting function is not enabled.
In the embodiment of the invention, after the AC acquires the IP address of the client, whether the IP address is a dynamic IP address is detected; if the IP address is the dynamic IP address, the client is allowed to access the network; if the IP address is not a dynamic IP address, namely the IP address is a static IP address, the client is refused to access the network, so that the problem caused by illegal embezzlement of the static IP address is avoided, the normal use of the network by a legal client is ensured, and unnecessary loss and potential safety hazards to the legal client are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for a client accessing a network according to an embodiment of the present invention;
fig. 2 is another schematic flowchart of a method for a client to access a network according to an embodiment of the present invention;
fig. 3 is another schematic flowchart of a method for a client to access a network according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for accessing a client to a network according to an embodiment 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to specific examples.
Referring to fig. 1, fig. 1 is a schematic flowchart of a method for a client to access a network according to an embodiment of the present invention, where the method is applied to an AC, and the method includes:
s101: acquiring an IP address of a client;
in an embodiment of the present invention, if a client wants to access a network, an AC needs to perform Portal authentication on the client, that is, the client needs to send an authentication request to the AC, and the AC may obtain an IP address of the client from the authentication request sent by the client.
S102: detecting whether the IP address is a dynamic IP address; if yes, executing S103; otherwise, executing S104;
s103: allowing the client to access a network;
s104: and rejecting the client to access the network.
In practical application, the AC needs to perform Portal authentication on the client, the security of a dynamic IP address is high, the security of a static IP address is low, and in order to ensure that the client normally uses a network and the information security of the client, if the obtained IP address is the dynamic IP address, the Portal authentication of the client can be considered to be successful, and the client is allowed to access the network; if the acquired IP address is not a dynamic IP address, that is, the acquired IP address is a static IP address, the Portal authentication of the client is considered to be failed, and the client is refused to access the network.
In an embodiment of the present invention, the enable switch may be configured on AC, as shown in fig. 2, and on the basis of fig. 1, the method may further include:
s105: detecting whether a detection function is enabled; if yes, executing S102; otherwise, S103 is executed.
When potential safety hazards exist in the network, the AC can be instructed to enable the detection function, namely, the AC is instructed to start the detection function, and the AC detects whether the obtained IP address is a dynamic IP address or not so as to avoid the potential safety hazards in the network as much as possible; and if all the clients in the network are legal clients and no potential safety hazard exists, the detection function can be closed, and the AC directly allows the clients to access the network. In this way, the access of the client to the network can be controlled more flexibly.
Based on that, another flowchart of a method for a client to access a network is provided in an embodiment of the present invention, as shown in fig. 3, where the dynamic IP address is generally an IP address allocated by a DHCP server, and S102 in the method may include:
s1021: detecting whether a DHCP server is configured locally; if so, go to S1022; otherwise, S1023 is executed;
in order to ensure that the client accesses the network quickly, the detection direction can be determined firstly, that is, whether a DHCP server is configured locally or not is detected, if the DHCP server is configured locally, whether the acquired IP address is the IP address allocated by the local DHCP server or not is detected, and if the acquired IP address is not the IP address allocated by another DHCP server (which may be a separate device or integrated on another device) is detected; if the DHCP server is not configured locally, the IP address allocated by other DHCP server can be directly detected.
S1022: detecting whether the IP address is an IP address distributed by a local DHCP server; if yes, executing S1024; otherwise, 1023 is performed;
the IP addresses allocated by the DHCP server may all be stored in one IP list, and when detecting whether the acquired IP address is an IP address allocated by a local DHCP server, it may be detected whether the local IP list includes the acquired IP address, and if so, it may be determined that the acquired IP address is an IP address allocated by the local DHCP server.
In an embodiment of the present invention, if there is no DHCP server in another AC-connected device, when it is detected that the obtained IP address is not an IP address allocated by the local DHCP server, it may be directly determined that the obtained IP address is not a dynamic IP address, and the client is denied access to the network.
S1023: detecting whether the IP address is an IP address allocated by other DHCP servers connected with the AC; if yes, executing S1024; otherwise, 1025 is executed.
In practical application, not every AC is configured with a DHCP server, and if one AC is not configured with a DHCP server, it can be understood that an acquired IP address may be an IP address allocated to another DHCP server connected to the AC, and the AC may simulate a client and send an inquiry packet to the other DHCP server, where the inquiry packet includes the acquired IP address; after receiving the query message, the other DHCP servers query whether the locally allocated IP address contains the acquired IP address, and feed back a query response message to the AC according to the query result; and the AC determines whether the acquired IP address is the IP address allocated by other DHCP servers or not according to the query response message. Such as: if all DHCP servers reply the query response message of 'not being the IP address allocated locally', the obtained IP address can be determined not to be the IP address allocated by other DHCP servers, and the client is refused to access the network; if the DHCP server replies the inquiry response message of 'being the IP address allocated locally', the acquired IP address can be determined to be the IP address allocated by other DHCP servers, and the client is allowed to access the network.
S1024: determining the IP address as a dynamic IP address;
s1025: determining that the IP address is not a dynamic IP address.
By applying the embodiment, after the AC acquires the network IP address of the client, whether the IP address is a dynamic IP address is detected; if the IP address is the dynamic IP address, the client is allowed to access the network; if the IP address is not a dynamic IP address, namely the IP address is a static IP address, the client is refused to access the network, so that the problem caused by illegal embezzlement of the static IP address is avoided, the normal use of the network by a legal client is ensured, and unnecessary loss and potential safety hazards to the legal client are avoided.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus for a client to access a network according to an embodiment of the present invention, applied to an AC, where the apparatus includes:
an obtaining unit 401, configured to obtain an IP address of a client;
a detecting unit 402, configured to detect whether the IP address is a dynamic IP address;
an allowing unit 403, configured to allow the client to access the network if the detection result of the detecting unit is yes;
a rejecting unit 404, configured to reject the client to access the network if the detection result of the detecting unit is negative.
In an embodiment of the present invention, the detecting unit 402 may be specifically configured to:
detecting whether a DHCP server is configured locally; if yes, detecting whether the IP address is an IP address distributed by a local DHCP server; if the address is the IP address distributed by the local DHCP server, determining the IP address as a dynamic IP address; and if the IP address is not the IP address allocated by the local DHCP server, determining that the IP address is not a dynamic IP address.
In an embodiment of the present invention, the detecting unit 402 may further be configured to:
when detecting that a DHCP server is not configured locally or when the IP address is not the IP address allocated by the local DHCP server, detecting whether the IP address is the IP address allocated by other DHCP servers of the AC connection; if so, determining the IP address as a dynamic IP address; if not, determining that the IP address is not a dynamic IP address.
In an embodiment of the present invention, the detecting unit 402 may be specifically configured to:
sending a query message to other DHCP servers connected with the AC, wherein the query message comprises the IP address; receiving a query response message fed back by the other equipment according to the query message;
and determining whether the IP address is the IP address allocated by the DHCP server on the other equipment or not according to the query response message.
In an embodiment of the present invention, the detecting unit 402 may be specifically configured to:
when the detection function is enabled, detecting whether the IP address is a dynamic IP address;
the allowing unit 403 may be further configured to allow the client to access the network when the detecting function is not enabled.
By applying the embodiment, after the AC acquires the IP address of the client, whether the IP address is a dynamic IP address is detected; if the IP address is the dynamic IP address, the client is allowed to access the network; if the IP address is not a dynamic IP address, namely the IP address is a static IP address, the client is refused to access the network, so that the problem caused by illegal embezzlement of the static IP address is avoided, the normal use of the network by a legal client is ensured, and unnecessary loss and potential safety hazards to the legal client are avoided.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those skilled in the art will appreciate that all or part of the steps in the above method embodiments may be implemented by a program to instruct relevant hardware to perform the steps, and the program may be stored in a computer-readable storage medium, which is referred to herein as a storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A method for a client to access a network, the method being applied to an Access Controller (AC), the method comprising:
acquiring a network protocol IP address of a client;
detecting whether the IP address is a dynamic IP address;
if yes, allowing the client to access the network;
if not, rejecting the client to access the network;
the step of detecting whether the IP address is a dynamic IP address includes:
detecting whether a Dynamic Host Configuration Protocol (DHCP) server is configured locally;
if yes, detecting whether the IP address is an IP address distributed by a local DHCP server;
if the address is the IP address distributed by the local DHCP server, determining the IP address as a dynamic IP address;
if the IP address is not the IP address distributed by the local DHCP server, determining that the IP address is not a dynamic IP address;
when detecting that the DHCP server is not configured locally or when the IP address is not the IP address allocated by the local DHCP server, the method further comprises the following steps:
detecting whether the IP address is an IP address allocated by other DHCP servers connected with the AC;
if so, determining the IP address as a dynamic IP address;
if not, determining that the IP address is not a dynamic IP address.
2. The method of claim 1, wherein the step of detecting whether the IP address is an IP address assigned by another DHCP server of the AC connection comprises:
sending a query message to other DHCP servers connected with the AC, wherein the query message comprises the IP address;
receiving query response messages fed back by the other DHCP servers according to the query messages;
and determining whether the IP address is the IP address allocated by the other DHCP servers or not according to the query response message.
3. The method of claim 1, wherein the step of detecting whether the IP address is a dynamic IP address comprises:
when the detection function is enabled, detecting whether the IP address is a dynamic IP address;
the method further comprises the following steps:
when the detection function is not enabled, the step of allowing the client to access the network is performed after the step of obtaining the network protocol IP address of the client.
4. An apparatus for a client to access a network, the apparatus being applied to an access controller, AC, and comprising:
the acquiring unit is used for acquiring a network protocol IP address of the client;
the detection unit is used for detecting whether the IP address is a dynamic IP address;
an allowing unit, configured to allow the client to access a network if a detection result of the detecting unit is yes;
the rejection unit is used for rejecting the client to access the network under the condition that the detection result of the detection unit is negative;
the detection unit is specifically configured to:
detecting whether a Dynamic Host Configuration Protocol (DHCP) server is configured locally; if yes, detecting whether the IP address is an IP address distributed by a local DHCP server; if the address is the IP address distributed by the local DHCP server, determining the IP address as a dynamic IP address; if the IP address is not the IP address distributed by the local DHCP server, determining that the IP address is not a dynamic IP address;
the detection unit is further configured to:
when detecting that a DHCP server is not configured locally or when the IP address is not the IP address allocated by the local DHCP server, detecting whether the IP address is the IP address allocated by other DHCP servers of the AC connection; if so, determining the IP address as a dynamic IP address; if not, determining that the IP address is not a dynamic IP address.
5. The apparatus according to claim 4, wherein the detection unit is specifically configured to:
sending a query message to other DHCP servers connected with the AC, wherein the query message comprises the IP address;
receiving query response messages fed back by the other DHCP servers according to the query messages;
and determining whether the IP address is the IP address allocated by the other DHCP servers or not according to the query response message.
6. The apparatus according to claim 4, wherein the detection unit is specifically configured to:
when the detection function is enabled, detecting whether the IP address is a dynamic IP address;
the allowing unit is further configured to allow the client to access a network when the detecting function is not enabled.
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| CN201610858462.6A CN106411882B (en) | 2016-09-28 | 2016-09-28 | Method and device for accessing client to network |
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| CN201610858462.6A CN106411882B (en) | 2016-09-28 | 2016-09-28 | Method and device for accessing client to network |
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| CN106411882B true CN106411882B (en) | 2021-01-15 |
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| CN105472054A (en) * | 2014-09-05 | 2016-04-06 | 华为技术有限公司 | Message transmission method and access equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002158701A (en) * | 2000-11-20 | 2002-05-31 | Fujitsu Ltd | Cable modem |
| JP3470756B2 (en) * | 2001-03-06 | 2003-11-25 | 日本電気株式会社 | Main device address restriction notification system |
| KR100505221B1 (en) * | 2002-07-03 | 2005-08-03 | 엘지전자 주식회사 | Remote Control System of Home Appliance Network and Its Operating Method for the same |
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2016
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921458A (en) * | 2005-08-23 | 2007-02-28 | 吴刚强 | System and method for uniform switch-in and exchange of enterprise E-mail |
| CN105472054A (en) * | 2014-09-05 | 2016-04-06 | 华为技术有限公司 | Message transmission method and access equipment |
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