CN1921496A - Method for DHCP client terminal to identifying DHCP server - Google Patents
Method for DHCP client terminal to identifying DHCP server Download PDFInfo
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- CN1921496A CN1921496A CN 200510041593 CN200510041593A CN1921496A CN 1921496 A CN1921496 A CN 1921496A CN 200510041593 CN200510041593 CN 200510041593 CN 200510041593 A CN200510041593 A CN 200510041593A CN 1921496 A CN1921496 A CN 1921496A
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- dhcp
- dynamic host
- host configuration
- configuration protocol
- protocol server
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Abstract
The invention relates to a method for recognizing DHCP server via DHCP client. Wherein, it comprises: DHCP client sets the trusted DHCP server information; the DHCP client sends DHCP discover data pack; in network, DHCP server responses said request and sends DHCP provide data pack; the DHCP client, based on DHCP provide data pack, analyzes the information of DHCP server; if it meets the trusted information, going on the DHCP consultation; or else, throwing out said report. The invention can confirm the DHCP client to access into network normally.
Description
Technical field
The present invention relates to data communication field, relate in particular to DHCP (Dynamic HostConfiguration Protocol, DHCP) technology.
Background technology
The full name of DHCP is DHCP (Dynamic Host ConfigurationProtocol), and by IETF (Internet network engineers group of task) design, detailed protocol contents has been stipulated at RFC document RFC2131.DHCP is the expansion of BOOTP (BootstrapProtocol sees RFC951), is based on C/S model, and it provides the mechanism of a kind of dynamic assigned ip address and configuration parameter, is mainly used in the relatively place of difficulty of large network environment and human configuration.The network manager concentrates on the parameter that is provided with of TCP/IP network on the server that moves DHCP, by Dynamic Host Configuration Protocol server automatically is main frame in the network, configurations such as client computer assigned ip address and route just, Dynamic Host Configuration Protocol server can appointment configuration parameter some and IP agreement and uncorrelated, but this can't influence the communication between the computer, and its configuration parameter makes the compunication on the network become convenient and realized easily.And DHCP makes can renting of IP address, this is with respect to one of BOOTP comparatively outstanding function, especially for the catenet that has many computers, such as the campus network in the university, it sometimes may be unnecessary that every computer static state has an IP address, and Dynamic Host Configuration Protocol server is that a rental period is specified in each IP address, and the rental period can be 1 minute, also can be indefinite duration, client computer also can continue to use the IP resource by re-renting.When the rental period to the time, Dynamic Host Configuration Protocol server can reclaim this IP address, distributes to other machine and uses.In addition, DHCP can also satisfy the service of moving well, because DHCP provides booking-mechanism, though change has taken place in the client computer physical location, but the essential information of client computer still exists in the server, when client computer is reissued request,, this IP address still can not use previous used address if just being assigned with away as yet.
Existing DHCP technology can be used well in the local area network (LAN) of enterprises, greatly alleviates the planning of TCP/IP network, the burden that administers and maintains, and carries out the distribution and the recovery of IP address automatically, does not need human intervention basically.But existing DHCP networking mode does not limit Dynamic Host Configuration Protocol server, if there are many Dynamic Host Configuration Protocol server in the network, be assigned to inappropriate IP address thereby then might cause dhcp client can't discern the Dynamic Host Configuration Protocol server of being trusted, so that can not normally carry out corresponding network function.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the shortcoming of the dhcp client shortage of prior art existence to the Dynamic Host Configuration Protocol server recognition mechanism, and then provide a kind of dhcp client to discern the method for Dynamic Host Configuration Protocol server, make full use of the characteristic that DHCP makes things convenient for network management, and cooperation realizes that to the recognition function of Dynamic Host Configuration Protocol server user's dhcp client inserts.
The invention provides a kind of method of dhcp client identification Dynamic Host Configuration Protocol server, technical scheme may further comprise the steps:
Step 1: dhcp client is provided with the Dynamic Host Configuration Protocol server information of being trusted;
Step 2: dhcp client sends DHCP and finds packet, this request of dhcp server response and send DHCP packet is provided in the network;
Step 3: dhcp client provides packet at the DHCP of dhcp server response, resolves the information of this Dynamic Host Configuration Protocol server, if meet the trust information of setting, then continues DHCP negotiations process and execution in step four, otherwise direct dropping packets;
Step 4: dhcp client is judged to be the Dynamic Host Configuration Protocol server of being trusted, and dhcp client is accepted the content of this Dynamic Host Configuration Protocol server distributing IP address and relevant configuration information, is linked in the network of specified request.
Compare and prior art, the present invention specifies the information of the Dynamic Host Configuration Protocol server trusted to realize the suitable lattice identification of Dynamic Host Configuration Protocol server by dhcp client, has solved the normally problem of access network of dhcp client that the uncertainty of distributing IP address when having a plurality of Dynamic Host Configuration Protocol server in the existing network causes.
Description of drawings
Fig. 1 is the inventive method flow chart;
Fig. 2 is the system model figure that the inventive method is used.
Embodiment
Below pass through accompanying drawing, and further specify the specific implementation of the present invention in conjunction with the embodiments at the dhcp client access service.
Fig. 2 is the system model that the inventive method is used: in local area network, have under the situation of many Dynamic Host Configuration Protocol server, can make dhcp client identify the Dynamic Host Configuration Protocol server of being trusted by the inventive method, accept the function of its distributing IP address and relevant configuration information.
In conjunction with Fig. 1, the present invention proposes two embodiment.
First embodiment may further comprise the steps:
The first step, client is specified the Dynamic Host Configuration Protocol server mac address information of being trusted;
In second step, dhcp client sends DHCP and finds (DHCP DISCOVER) packet, and receiving the dhcp server response request of DHCP DISCOVER packet and sending DHCP provides (DHCP OFFER) packet;
In the 3rd step, dhcp client is resolved the MAC Address of this Dynamic Host Configuration Protocol server at the DHCP OFFER packet of dhcp server response;
In the 4th step, judge whether the MAC Address that parses meets the Dynamic Host Configuration Protocol server MAC Address of being trusted of client setting.If meet then carry out follow-up DHCP negotiations process; If do not meet then direct dropping packets.
Dhcp client is judged to be the Dynamic Host Configuration Protocol server of being trusted, and dhcp client is accepted the content of this Dynamic Host Configuration Protocol server distributing IP address and relevant configuration information, is linked in the network of specified request.
Second embodiment may further comprise the steps:
The first step, client is specified the IP address of the Dynamic Host Configuration Protocol server of being trusted;
In second step, dhcp client sends DHCP DISCOVER packet, receives this request of dhcp server response of DHCP DISCOVER packet and sends the DHCPOFFER packet;
In the 3rd step, dhcp client is resolved the IP address of Dynamic Host Configuration Protocol server at the DHCP OFFER packet of dhcp server response;
In the 4th step, judge whether the IP address that parses meets the dhcp server ip address of being trusted of client setting.If meet then carry out follow-up DHCP negotiations process; If do not meet then direct dropping packets.
Dhcp client is judged to be the Dynamic Host Configuration Protocol server of being trusted, and dhcp client is accepted the content of this Dynamic Host Configuration Protocol server distributing IP address and relevant configuration information, is linked in the network of specified request.
In sum, method of the present invention has merged the characteristic that DHCP is convenient to network management well, has satisfied the requirement of dhcp client to the Dynamic Host Configuration Protocol server authentication of being asked simultaneously again, creatively the mode of dhcp client accessing to wide band network is expanded.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (3)
1. the method for dhcp client identification Dynamic Host Configuration Protocol server may further comprise the steps:
Step 1: dhcp client is provided with the Dynamic Host Configuration Protocol server information of being trusted;
Step 2: dhcp client sends DHCP and finds packet, this request of dhcp server response and send DHCP packet is provided in the network;
Step 3: dhcp client provides packet at the DHCP of dhcp server response, resolves the information of this Dynamic Host Configuration Protocol server, if meet the trust information of setting, then continues DHCP negotiations process and execution in step four, otherwise direct dropping packets;
Step 4: dhcp client is judged to be the Dynamic Host Configuration Protocol server of being trusted, and dhcp client is accepted the content of this Dynamic Host Configuration Protocol server distributing IP address and relevant configuration information, is linked in the network of specified request.
2. method according to claim 1 is characterized in that, it is the mac address information of specifying Dynamic Host Configuration Protocol server that dhcp client is provided with the Dynamic Host Configuration Protocol server information of being trusted.
3. method according to claim 1 is characterized in that, it is the IP address of specifying Dynamic Host Configuration Protocol server that dhcp client is provided with the Dynamic Host Configuration Protocol server information of being trusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100415937A CN1921496B (en) | 2005-08-24 | 2005-08-24 | Method for DHCP client terminal to identifying DHCP server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100415937A CN1921496B (en) | 2005-08-24 | 2005-08-24 | Method for DHCP client terminal to identifying DHCP server |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1921496A true CN1921496A (en) | 2007-02-28 |
| CN1921496B CN1921496B (en) | 2010-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100415937A Expired - Fee Related CN1921496B (en) | 2005-08-24 | 2005-08-24 | Method for DHCP client terminal to identifying DHCP server |
Country Status (1)
| Country | Link |
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| CN (1) | CN1921496B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677279A (en) * | 2008-09-16 | 2010-03-24 | 深圳华为通信技术有限公司 | LAN device, gateway and association method thereof |
| CN102299932A (en) * | 2011-09-22 | 2011-12-28 | 杭州华三通信技术有限公司 | Backup method for DHCP (Dynamic Host Configuration Protocol) server and DHCP server |
| CN102647486A (en) * | 2012-04-28 | 2012-08-22 | 华为技术有限公司 | Address distributing method, address distributing equipment and address distributing system |
| CN102970383A (en) * | 2012-11-13 | 2013-03-13 | 中兴通讯股份有限公司 | Method and device for allocating internet protocol (IP) addresses and method and device for processing information |
| CN103812722A (en) * | 2012-11-14 | 2014-05-21 | 纬创资通股份有限公司 | Detection method for network system and network system |
| CN106790701A (en) * | 2017-02-23 | 2017-05-31 | 郑州云海信息技术有限公司 | It is a kind of to orient the method and device that Dynamic Host Configuration Protocol server is specified in request |
| CN111464523A (en) * | 2020-03-27 | 2020-07-28 | 深圳融安网络科技有限公司 | Network monitoring method, terminal device and computer readable storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417127C (en) * | 2002-04-10 | 2008-09-03 | 中兴通讯股份有限公司 | User management method based on dynamic mainframe configuration procotol |
| CN1248447C (en) * | 2002-05-15 | 2006-03-29 | 华为技术有限公司 | Broadband network access method |
| JP4002844B2 (en) * | 2003-01-21 | 2007-11-07 | 株式会社エヌ・ティ・ティ・ドコモ | Gateway device and network connection method |
-
2005
- 2005-08-24 CN CN2005100415937A patent/CN1921496B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677279A (en) * | 2008-09-16 | 2010-03-24 | 深圳华为通信技术有限公司 | LAN device, gateway and association method thereof |
| CN102299932A (en) * | 2011-09-22 | 2011-12-28 | 杭州华三通信技术有限公司 | Backup method for DHCP (Dynamic Host Configuration Protocol) server and DHCP server |
| CN102647486A (en) * | 2012-04-28 | 2012-08-22 | 华为技术有限公司 | Address distributing method, address distributing equipment and address distributing system |
| CN102647486B (en) * | 2012-04-28 | 2015-11-25 | 华为技术有限公司 | Address distribution method, equipment and system |
| CN105245638B (en) * | 2012-04-28 | 2019-06-21 | 华为技术有限公司 | Address distribution method, equipment and system |
| CN102970383A (en) * | 2012-11-13 | 2013-03-13 | 中兴通讯股份有限公司 | Method and device for allocating internet protocol (IP) addresses and method and device for processing information |
| CN102970383B (en) * | 2012-11-13 | 2018-07-06 | 中兴通讯股份有限公司 | A kind of method and device, method and device of information processing for distributing IP address |
| CN103812722A (en) * | 2012-11-14 | 2014-05-21 | 纬创资通股份有限公司 | Detection method for network system and network system |
| US9674319B2 (en) | 2012-11-14 | 2017-06-06 | Wistron Corporation | Detection method in network system and related apparatus |
| CN103812722B (en) * | 2012-11-14 | 2017-10-24 | 纬创资通股份有限公司 | Detection method for network system and network system |
| CN106790701A (en) * | 2017-02-23 | 2017-05-31 | 郑州云海信息技术有限公司 | It is a kind of to orient the method and device that Dynamic Host Configuration Protocol server is specified in request |
| CN111464523A (en) * | 2020-03-27 | 2020-07-28 | 深圳融安网络科技有限公司 | Network monitoring method, terminal device and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1921496B (en) | 2010-04-14 |
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Owner name: BEIJING POWER ECONOMIC RESEARCH INSTITUTE Free format text: FORMER OWNER: ZTE CORPORATION Effective date: 20140129 Owner name: STATE GRID BEIJING ELECTRIC POWER COMPANY CHINA TE Effective date: 20140129 |
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Effective date of registration: 20140129 Address after: 100055 No. 15 West Street, Guanganmen station, Beijing, Xicheng District Patentee after: State Power Economic Research Institute Patentee after: State Grid Beijing Electric Power Company Patentee after: CHINA TECHNOLOGY EXCHANGE CO., LTD. Address before: 518057 law department, Zhongxing building, South hi tech Industrial Park, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: ZTE Corporation |
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