CN1450766A - User management method based on dynamic mainframe configuration procotol - Google Patents
User management method based on dynamic mainframe configuration procotol Download PDFInfo
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Abstract
The present invention includes the steps as the follows: 1) DHCP request is issued by the client end, 2) the request from the client end is responded by DHCP service and to set up the client control information to limit the access ability of the client, 3) the client authentication has been carried on and to send the authentication resu9lt back to DHCP server, 4) the client control information is refreshed by DHCP server as per the authentication result and to send the new network disposal to the client end and 5) the client is on network as normal and DHCP server processes other DHCP information of the client.
Description
Technical field
The present invention relates to broadband access network, specifically, relate to a kind of access server inserts authentification of user and management to DHCP (DynamicHost Configuration Protocol DHCP) method.
Background technology
The full name of DHCP is DHCP (Dynamic Host Configuration Protocol), and by IETF (Intemet network engineers group of task) design, detailed protocol contents is at RFC document rfc2131.DHCP is BOOTP (Bootstrap Protocol, see RFC951) expansion, based on C/S (Client/Server client/service) pattern, the mechanism of a kind of dynamic assigned ip address and network configuration is provided, be mainly used in the relatively place of difficulty of large network environment and configuration.The network manager concentrates on the parameter of network configuration on the operation Dynamic Host Configuration Protocol server, by Dynamic Host Configuration Protocol server automatically is configurations such as main frame assigned ip address in the network and route, some is also uncorrelated with the IP agreement for the configuration parameter of Dynamic Host Configuration Protocol server appointment, but this can't influence the communication between the computer, on the contrary, its configuration parameter makes compunication on the network become convenient and has realized easily.And DHCP makes can being rented of IP address, this is with respect to one of BOOTP comparatively outstanding function, especially for the catenet that has a large amount of computers, 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, this characteristic has also satisfied the requirement of access server well.In addition, DHCP can also satisfy the service of moving well, this is 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.
DHCP can use 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 this traditional DHCP networking mode only is a kind of IP network of enterprise-level, be based on enterprises and trust the network of not runing, from the angle of operator is the network of zero management, especially DHCP Server is mainly used in the supervising the network configuration, management to the user is carried out in the mode of set, except that the IP address, a plurality of users use identical network configuration, a slight change will influence whole network, and can not dynamically revise, need keeper's manual intervention, so be adapted at using in the metastable intranet.But Access Network requires can be for unique user provides customize services, and each user's configuration is independently, and can dynamically update, to satisfy the needs of management.So when DHCP as business realizing mode of broadband access the time, prior art can not be carried out necessary management to the user well.
Summary of the invention
The objective of the invention is of the prior art DHCP to be lacked the shortcoming of operation management mechanism, propose the characteristic that a kind of DHCP of making full use of makes things convenient for network management, realize DHCP is inserted user's a kind of effective authentication and the method for management in order to have overcome.
Core concept of the present invention is: by introduce the user control information, strengthen the management function of DHCP Server to the user, control information can influence the negotiations process of DHCP and user's internet behavior.The acquisition of subscriber control information is then closely related with user's authentication with change, thereby has satisfied in the Access Network requirement to authentification of user and management well.
Technical scheme of the present invention is to realize like this.A kind of user management method based on DHCP comprises the following steps:
1. client is sent the DHCP request;
2. dhcp server response client-requested is set up subscriber control information, the restricting user access ability;
3. the user authenticates, and authentication result is returned to Dynamic Host Configuration Protocol server;
4. Dynamic Host Configuration Protocol server upgrades subscriber control information according to authentication result, and new network configuration is issued client;
5. the user normally surfs the Net, other DHCP information of Dynamic Host Configuration Protocol server process user.
The subscriber control information of described step in 2. includes but not limited to: the MAC Address of client computer, the hardware information of VLANDID and incoming end.
Described Dynamic Host Configuration Protocol server is built in the access server.
The 2. middle dhcp server response client-requested of described step comprises distributes to IP address of client and corresponding network configuration from the IP address pool of appointment.The IP address here can be a private net address.
The authentication of described step in 3. can be the WEB authentication, also can be other authentication, but institute adopt authentication mode must and Dynamic Host Configuration Protocol server between carry out interacting message, make Dynamic Host Configuration Protocol server can obtain the client certificate result.
The 4. middle subscriber control information that upgrades of described step is to show the user keeping under the online condition of user, by changing subscriber control information to change user's access ability, and corresponding configuration passed to client, perhaps still allow the user use original private net address, can provide NAT (network address translation protocol) conversion this situation system.
Described step 1. in to not by the authentication disabled user and authentification of user overtime, Dynamic Host Configuration Protocol server will be regained the IP address, force to take out stitches, and the generation record.
Adopt the method for the invention, solved when the user uses DHCP to insert the more weak problem of user management, can select multiple authentication mode, expansion is convenient, greatly alleviates the network operation burden.And method of the present invention has merged the characteristic that DHCP is convenient to network configuration well, has satisfied the harsh requirement of access server to user management again simultaneously, makes the DHCP to become a kind of the operation and convenient-to-running broadband access method.
Description of drawings Fig. 1 is the flow chart based on the user management method of DHCP that the present invention proposes.Fig. 2 is the realization schematic diagram that the DHCP of one embodiment of the present of invention inserts.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the flow chart based on the user management method of DHCP that the present invention proposes.As shown in Figure 1, a kind of user management method based on DHCP comprises the following steps: that 1. client is sent the DHCP request; 2. dhcp server response client-requested is set up subscriber control information, the restricting user access ability; 3. the user authenticates, and authentication result is returned to Dynamic Host Configuration Protocol server; 4. Dynamic Host Configuration Protocol server upgrades subscriber control information according to authentication result, and new network configuration is issued client; 5. the user normally surfs the Net, other DHCP information of Dynamic Host Configuration Protocol server process user.
Before the authentification of user, the subscriber's main station of operation dhcp client is initiated DHCP and is asked access server, the Dynamic Host Configuration Protocol server that is built on the access server is distributed to IP address of client (most of situation is a private net address) from the IP address pool of certain appointment, distributing the address is the DHCP negotiations process of standard, but in order to reach manageable purpose, need on access server, set up user's control information, with the internet behavior of leading subscriber.
When setting up subscriber control information, Dynamic Host Configuration Protocol server utilizes the essential information of the client of collecting in the DHCP negotiations process, the MAC Address that comprises client computer, hardware informations such as VLAN ID and access interface, with this unique identification, and set up relation one to one with IP address and control information as the user.This unique identification is not fixed, and be to begin to apply for the IP address from the user its life cycle, in a period of time of rolling off the production line of surfing the Net.Changed the on-position of network interface card or change if one of benefit of making like this is the user, webmaster does not need to do corresponding change.
Set up after the subscriber control information, before the authentication, it (mainly is to carry out the IP address to re-rent that client and Dynamic Host Configuration Protocol server still can regularly carry out the DHCP negotiation, see the DHCP agreement for details), Dynamic Host Configuration Protocol server still is a client service, but subscriber control information can be judged the user and whether surpass the regulation authenticated time, and the line that in good time user cleaned with a pointed instrument, and reclaims the IP resource.Traditional Dynamic Host Configuration Protocol server is only established a rental period, and if the user initiatively do not roll off the production line, just can use the IP address of distributing always.
After the user obtains the IP address, just can partly realize function of surfing the Net, but under the effect of control information, online is limited, because this fashion does not authenticate the user.Mode about authentication has exceeded this paper scope, here be example explanation process wherein with the WEB authentication: the user before the authentication can only visit and authenticate relevant specified web, perhaps access server can be directed to all HTTP request of user on the WEB server of certain appointment (needing redirection function), seen on subscriber's main station is exactly the login page of a request input username and password, the WEB server receives username and password, deliver to AAA (authentication, chargeing and authorization server) server authenticates, and the result issued access server.This only is a kind of possible authentication mode, can select other ripe scheme in the time of practical application, and this paper does not describe in detail.
If authentification of user passes through, access server reconfigures user's control information according to authentication result, and the rule of being formulated when opening an account for the user realizes user's function of surfing the Net.And in the DHCP negotiations process after and then refreshing subscriber control information, new network configuration is issued client.Two kinds of update modes commonly used are arranged at present, the one, change a public network address to the user, another is still to use original private net address, but NAT (network address translation protocol) is provided conversion.Traditional Dynamic Host Configuration Protocol server then can't accomplish dynamically to upgrade like this user's network configuration, needs keeper's intervention.If authentication is not passed through, then logging off users control information even user's IP address did not still lose efficacy as yet, but has not had corresponding control information on access server in the rental period, and the user still can't use network.
Authentication by after the user begin normal online, and Dynamic Host Configuration Protocol server is only handled dhcp message, does not interfere user's last network process, does not take user's bandwidth substantially, the control information of this moment is born flow control, functions such as link detecting and charging.
Fig. 2 is the realization schematic diagram that the DHCP of one embodiment of the present of invention inserts.As shown in Figure 2, user A is linked among the BAS Broadband Access Server C by switch b, and from access server C acquisition private network IP address, and DNS, mask and routing configuration (dns address, mask and route all be configured in advance in the database of Dynamic Host Configuration Protocol server, consult to be configured to client by DHCP again).Access server B then makes user A can only visit broadband access door D by the control information of configure user A.User A initiatively logins broadband access door D then, perhaps forwards the all-access request of user A to broadband access door D (needing redirection function) by access server C.Behind the user A login broadband access door D, first page of visit is exactly a Verify Your Identity page, require user A input username and password, broadband access door D delivers to E with information and authenticates (or middle through BAS Broadband Access Server C transfer) then, and authentication result turned back to BAS Broadband Access Server C, refresh corresponding subscriber control information, notify user A authentication result simultaneously.For the user A that authentication is passed through, subscriber control information and the user A of BAS Broadband Access Server C after according to authentication carries out DHCP to be consulted, and the result of negotiation can be that user A continues use private network IP and also can be to use new public network IP, viewing system configuring condition and deciding.If use private network then BAS Broadband Access Server C need add nat feature or an external NAT server (expression among Fig. 2) and convert the private network IP of user A to public network IP, use public network IP then simple relatively.After refreshing the network configuration of client, under the management of BAS Broadband Access Server C, user A just can realize the function of broadband access, by router F visit internet.
Claims (10)
1, a kind of user management method based on DHCP is characterized in that comprising the following steps: that 1. client is sent the DHCP request; 2. dhcp server response client-requested is set up subscriber control information, the restricting user access ability; 3. the user authenticates, and authentication result is returned to Dynamic Host Configuration Protocol server; 4. Dynamic Host Configuration Protocol server upgrades subscriber control information according to authentication result, and new network configuration is issued client; 5. the user normally surfs the Net, other DHCP information of Dynamic Host Configuration Protocol server process user.
2, a kind of user management method based on DHCP according to claim 1 is characterized in that the subscriber control information during described step 2. includes but not limited to: the MAC Address of client computer, the hardware information of VLANDID and incoming end.
3, a kind of user management method based on DHCP according to claim 1 is characterized in that described Dynamic Host Configuration Protocol server is built in the access server.
4, a kind of user management method based on DHCP according to claim 1 is characterized in that the dhcp server response client-requested comprises during described step 2. to distribute to IP address of client and corresponding network configuration from the IP address pool of appointment.
5, a kind of user management method based on DHCP according to claim 4 is characterized in that described IP address is a private net address.
6, a kind of user management method based on DHCP according to claim 1 is characterized in that the authentication during described step 3. is the WEB authentication.
7, a kind of user management method according to claim 1 based on DHCP, it is characterized in that the 4. middle subscriber control information that upgrades of described step is meant under the online condition of maintenance user, by changing subscriber control information changing user's access ability, and corresponding configuration is passed to client.
8, a kind of user management method according to claim 1 based on DHCP, it is characterized in that upgrading during described step 4. subscriber control information and be meant and still allow the user use original private net address, but provide NAT (network address translation protocol) conversion.
9, a kind of user management method based on DHCP according to claim 1 is characterized in that the disabled user to not passing through to authenticate during described step 1., and Dynamic Host Configuration Protocol server will be regained the IP address, forces to take out stitches, and generates record.
10, a kind of user management method based on DHCP according to claim 1 is characterized in that for authentification of user overtimely, and Dynamic Host Configuration Protocol server will be regained the IP address, forces to take out stitches, and generates record.
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