CN102932501A - Address pool resource protecting method and device thereof - Google Patents
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- CN102932501A CN102932501A CN2012104445791A CN201210444579A CN102932501A CN 102932501 A CN102932501 A CN 102932501A CN 2012104445791 A CN2012104445791 A CN 2012104445791A CN 201210444579 A CN201210444579 A CN 201210444579A CN 102932501 A CN102932501 A CN 102932501A
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Abstract
The invention discloses an address pool resource protecting method and a device thereof. Due to the fact that a currently available address resource pool and a global address resource pool are arranged on a dynamic host configuration protocol (DHCP) server, according to different quantity demands for internet protocol (IP) address in different periods of time, IP addresses with corresponding quantity are extracted from the global address resource pool to be configured to the currently available address resource pool. According to the address pool resource protecting method and the device thereof, the fact that a normal user can not acquire the IP addresses so that surfing the Internet can not be achieved caused by the fact that an unauthorized user consumes a large quantity of IP addresses is effectively avoided.
Description
Technical field
The present invention relates to network safety filed, relate in particular to a kind of method and device of address pool protection of resources.
Background technology
In the TCP/IP network, every work station is wanted to obtain online resource, must carry out basic Network resource allocation.DHCP is a kind of TCP/IP standard of simplifying the host ip configuration management.DHCP is divided into Dynamic Host Configuration Protocol server and dhcp client, and the main function of Dynamic Host Configuration Protocol server is other relevant configuration information of enabling dhcp client on the distribution of management ip address and the network.DHCP supports three kinds of different mechanism to be used for the configuration of IP host address: automatically configuration, dynamic-configuration and human configuration.Wherein, under automatic configuration mechanism, in case for the first time success of dhcp client after Dynamic Host Configuration Protocol server is rented the IP address, with regard to this address of eternal use.Under dynamic-configuration mechanism, after dhcp client is rented the IP address from Dynamic Host Configuration Protocol server for the first time, and use non-permanently this address, as long as lease expires, dhcp client just needs to discharge this IP address.Under human configuration mechanism, the IP address of dhcp client can be by manually distributing.Use at present maximum mechanism to be dynamic-configuration mechanism.
A kind of address pool resource allocation methods of the prior art, as shown in Figure 1, when the DHCP request message that receives client's transmission, Dynamic Host Configuration Protocol server judges whether there is available IP address in the IP address resource pond, if then be described client configuration IP address, and the IP address of configuration sent to described client by the DHCPACR message, otherwise, ignored request or return DHCP NACK message to client.The implementation of Dynamic Host Configuration Protocol server is that the client that is based upon all DHCP request messages all is on the believable basis in the prior art scheme, does not consider the safety problem of network.In nowadays complicated network environment, will inevitably there be potential safety hazard, certain assailant network user that disguises oneself as for example, send a large amount of solicited messages, can cause Dynamic Host Configuration Protocol server end IP address resource to exhaust, the follow-up real network user's demand is then ignored by Dynamic Host Configuration Protocol server, thereby causes large-area user's suspension.
Summary of the invention
In view of this, the invention provides a kind of method and apparatus of address pool protection of resources, be applied to Dynamic Host Configuration Protocol server, can reduce the depleted risk of Dynamic Host Configuration Protocol server address pool resource.
For realizing the object of the invention, implementation of the present invention is specific as follows:
A kind of method of address pool protection of resources is applied to Dynamic Host Configuration Protocol server, and described Dynamic Host Configuration Protocol server is provided with current available address resource pool and global address resource pool, said method comprising the steps of:
Obtain the IP number of addresses corresponding with current slot, from the global address resource pool, extract the IP address of respective numbers, be configured in the described current available address resource pool;
Receive the DHCP request message that client sends, inquire about in the current available address resource pool and whether have the configurable I P address, if, be described client configuration IP address, and with the configuration the IP address send to described client by the DHCPACK message, otherwise, ignored request or return DHCP NACK message to described client.
The present invention provides a kind of device of address pool protection of resources simultaneously, is applied to Dynamic Host Configuration Protocol server, and described Dynamic Host Configuration Protocol server is provided with current available address resource pool and global address resource pool, and described device comprises:
The address resource allocation units are used for obtaining the IP number of addresses corresponding with current slot, extract the IP address of respective numbers from the global address resource pool, are configured in the described current available address resource pool;
The address resource processing unit, be used for receiving the DHCP request message that client sends, inquire about in the current available address resource pool and whether have the configurable I P address, if, be described client configuration IP address, and the IP address of configuration sent to described client by DHCP ACK message, otherwise, ignored request or return DHCP NACK message to described client.
Compared with prior art, the present invention is by arranging current available address resource pool and global address resource pool at Dynamic Host Configuration Protocol server, by different according to different time period IP address need quantity, from the global address resource pool, extract the IP address configuration of respective numbers in described current available address resource pool, can effectively prevent the disabled user from consuming a large amount of IP addresses and cause normal users can't obtain the IP address, and then can't surf the Net.
Description of drawings
Fig. 1 is address resource allocation method schematic flow sheet in the prior art of the present invention.
Fig. 2 is the method flow schematic diagram of address pool protection of resources of the present invention.
Fig. 3 is the device logic composition diagram of address pool protection of resources of the present invention.
Embodiment
The invention provides a kind of method and apparatus of address pool protection of resources, be applied to Dynamic Host Configuration Protocol server.General design of the present invention is: at Dynamic Host Configuration Protocol server current available address resource pool and global address resource pool are set, different according to time period IP address need quantity different in the network, from the global address resource pool, extract the IP address configuration of respective numbers in current available address resource pool; When receiving the DHCP request message of client transmission, inquire about in the current available address resource pool and whether have the configurable I P address, if, be described client configuration IP address, and with the configuration the IP address send to client by DHCP ACK message, otherwise, ignored request or return DHCP NACK message to client.
For realizing the object of the invention, describe the present invention in detail below in conjunction with accompanying drawing.Please refer to Fig. 2, the method for a kind of address pool protection of resources provided by the invention is applied to Dynamic Host Configuration Protocol server, and described Dynamic Host Configuration Protocol server is provided with current available address resource pool and global address resource pool, said method comprising the steps of:
Particularly, network user's surf time is more concentrated, such as office building, commuter time is more fixing, in this class environment, how the user applies for the IP address resource at a fixed time, and the IP address that the work hours ask and the message interaction of renewed treaty are many, and the message interaction of the IP address of asking after coming off duty and renewed treaty is fewer.For example, in 8 o'clock to 18 o'clock time period on weekdays, the company personnel is on duty, and the IP address requesting resource is many, also needs behind single expiry of tenancy to continue to renew a contract, and the message interaction of renewed treaty is also many.
Therefore, in Dynamic Host Configuration Protocol server, the corresponding relation that needs pre-configured time period and IP number of addresses, for example, in on weekdays 8 o'clock to 18 time period in the current available address pond in 1000 IP addresses of configuration, and 100 IP addresses of configuration in 18 to 8 of second day and the working day current available address pond on weekdays.Wherein, described corresponding relation is according to the statistical law setting of DHCP request message quantity in each time period.Described statistical law refers to that the keeper adds up the quantity of IP address resource request in the past each time period, draw metastable client-requested IP number of addresses in each time period, then carry out the corresponding relation configuration of time period and IP number of addresses according to the client-requested IP number of addresses of each time period.
Dynamic Host Configuration Protocol server whenever at regular intervals, corresponding relation according to time period and IP number of addresses, obtain the IP number of addresses corresponding with current slot, from the global address resource pool, extract the IP address of respective numbers, be configured in the described current available address resource pool, finish the configuration of IP address resource.Wherein, the configuration that specifically needs the interval how long to carry out the IP address resource is configured according to actual needs by the keeper.The present invention is by arranging current available address resource pool and global address resource pool at Dynamic Host Configuration Protocol server, and different according to different time period IP address need quantity, from the global address resource pool, extract the IP address configuration of respective numbers in described current available address resource pool, can effectively prevent the disabled user from consuming a large amount of IP addresses and cause normal users can't obtain the IP address, and then can't surf the Net.
Further, server can dynamically append and reclaim the IP address resource according to IP resource situation in the current available address pond, when the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not greater than the first threshold value of setting in advance in the described current available address resource pool, from described current available address resource pool, reclaim the IP address in described global address resource pool, be lower than described the first threshold value so that the IP number of addresses that does not configure in the described current available address resource pool accounts for the ratio of described IP number of addresses; When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not less than the second threshold value of setting in advance in the described current available address resource pool, from described global address resource pool, extract the IP address and be appended in the described current available address resource pool so that in the described current available address resource pool not the IP number of addresses of configuration account for the ratio of described IP number of addresses greater than described the second threshold value.Wherein, described the first threshold value and the second threshold value are specifically arranged as required by the keeper, and the first threshold value is greater than the second threshold value.Dynamically append and reclaim the IP address resource by server, IP address resource situation can maintain in the metastable environment in the current available address resource pool, under normal circumstances, can either satisfy client DHCP request, can prevent again IP resource exhaustion.
Further, in described Dynamic Host Configuration Protocol server, set in advance the mac address range table, wherein, the corresponding high-priority users of the MAC Address in the described mac address range table; When receiving the DHCP request that a plurality of users send, server preferentially with IP address assignment to high-priority users.When unappropriated IP address resource was not enough in current available address resource pool, recovery had been distributed to other outer users of described mac address range IP address in described current available address resource pool.Because working environment equipment generally all is centralized purchasing, network hardware addresses mostly is continuous, the keeper can configure a mac address range, the user of mac address range is as preferential guarantee user, resource in the address pool preferentially satisfies this part user's demand, when receiving the DHCP request that a plurality of users send, Dynamic Host Configuration Protocol server can be preferentially with IP address assignment to high-priority users.Simultaneously, when resource in the address pool can not satisfy this part user's demand, Dynamic Host Configuration Protocol server had the right to deprive the IP address right to use of other low priority users, thereby the demand that has ensured responsible consumer can be met.This situation generally occurs in metastable environment, illustrate that network is attacked, those low priority users that occupy the IP address are likely the disabled user, so server can be enjoyed the power of depriving.
Particularly, when client need to be networked, at first to send the DHCP request message to Dynamic Host Configuration Protocol server.Receive the DHCP request message of client when Dynamic Host Configuration Protocol server after, inquire about and whether have configurable IP address (being unappropriated IP address) in the current available address resource pool, if exist, then send to client for client configuration IP address and with described IP address by DHCP ACK message, if there is no, then to the client ignored request or return DHCP NACK message or directly ignore the DHCP request of client.
Please refer to Fig. 3, for the invention provides a kind of device of address pool protection of resources.Described application of installation is in Dynamic Host Configuration Protocol server, and described Dynamic Host Configuration Protocol server is provided with current available address resource pool and global address resource pool, and described device comprises:
Address resource allocation units 301 are used for obtaining the IP number of addresses corresponding with current slot, extract the IP address of respective numbers from the global address resource pool, are configured in the described current available address resource pool;
Particularly, described address resource allocation units whenever at regular intervals, corresponding relation according to time period and IP number of addresses, obtain the IP number of addresses corresponding with current slot, from the global address resource pool, extract the IP address of respective numbers, be configured in the described current available address resource pool, finish the configuration of IP address resource.Wherein, the configuration that specifically needs the interval how long to carry out the IP address resource is configured according to actual needs by the keeper.
Described address resource allocation units 301 are further used for: when the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not greater than the first threshold value of setting in advance in the described current available address resource pool, reclaim the IP address from described current available address resource pool in described global address resource pool; When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not less than the second threshold value of setting in advance in the described current available address resource pool, from described global address resource pool, extracts the IP address and be appended in the described current available address resource pool.
Particularly, when the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not greater than the first threshold value of setting in advance in the described current available address resource pool, described address resource allocation units reclaim the IP address in described global address resource pool from described current available address resource pool, be lower than described the first threshold value so that the IP number of addresses that does not configure in the described current available address resource pool accounts for the ratio of described IP number of addresses; When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not less than the second threshold value of setting in advance in the described current available address resource pool, described address resource allocation units extract the IP address and are appended in the described current available address resource pool from described global address resource pool, so that the IP number of addresses that does not configure in the described current available address resource pool accounts for the ratio of described IP number of addresses greater than described the second threshold value.Wherein, described the first threshold value and the second threshold value are specifically arranged as required by the keeper, and the first threshold value is greater than the second threshold value.Dynamically append and reclaim the IP address resource by server, IP address resource situation can maintain in the metastable environment in the current available address resource pool, under normal circumstances, can either satisfy client DHCP request, can prevent again IP resource exhaustion.
Address resource processing unit 302, be used for receiving the DHCP request message that client sends, inquire about in the current available address resource pool and whether have the configurable I P address, if, be described client configuration IP address, and the IP address of configuration sent to described client by DHCP ACK message, otherwise, ignored request or return DHCP NACK message to described client.
Particularly, when client need to be networked, at first to send the DHCP request message to Dynamic Host Configuration Protocol server.Receive the DHCP request message of client when Dynamic Host Configuration Protocol server after, described address resource processing unit inquires about whether there is configurable IP address (being unappropriated IP address) in the current available address resource pool, if exist, then send to client for client configuration IP address and with described IP address by DHCP ACK message, if there is no, then to the client ignored request or return DHCP NACK message or directly ignore the DHCP request of client.
Further, described device also comprises:
Dispensing unit 303, for the corresponding relation of pre-configured time period and IP number of addresses, wherein said corresponding relation is according to the statistical law setting of DHCP request message quantity in each time period.Wherein, described statistical law refers to that the keeper adds up the quantity of IP address resource request in the past each time period, draw metastable client-requested IP number of addresses in each time period, then carry out the corresponding relation configuration of time period and IP number of addresses according to the client-requested IP number of addresses of each time period.
Further, described device also comprises:
Described priority dispensing unit 304 is further used for, when receiving the DHCP request that a plurality of users send, preferentially with IP address assignment to high-priority users.
Described priority dispensing unit 304 is further used for, and when unappropriated IP address resource was not enough in current available address resource pool, recovery had been distributed to other outer users of described mac address range IP address in described current available address resource pool.
Particularly, described priority dispensing unit sets in advance the mac address range table in described Dynamic Host Configuration Protocol server, wherein, and the corresponding high-priority users of the MAC Address in the described mac address range table; When receiving the DHCP request that a plurality of users send, described priority dispensing unit preferentially with IP address assignment to high-priority users.When unappropriated IP address resource was not enough in current available address resource pool, described priority dispensing unit recovery had been distributed to other outer users of described mac address range IP address in described current available address resource pool.Because working environment equipment generally all is centralized purchasing, network hardware addresses mostly is continuous, the keeper can configure a mac address range, the user of mac address range is as preferential guarantee user, resource in the address pool preferentially satisfies this part user's demand, when receiving the DHCP request that a plurality of users send, Dynamic Host Configuration Protocol server can be preferentially with IP address assignment to high-priority users.Simultaneously, when resource in the address pool can not satisfy this part user's demand, Dynamic Host Configuration Protocol server had the right to deprive the IP address right to use of other low priority users, thereby the demand that has ensured responsible consumer can be met.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. the method for an address pool protection of resources is applied to Dynamic Host Configuration Protocol server, it is characterized in that, described Dynamic Host Configuration Protocol server is provided with current available address resource pool and global address resource pool, said method comprising the steps of:
Obtain the IP number of addresses corresponding with current slot, from the global address resource pool, extract the IP address of respective numbers, be configured in the described current available address resource pool;
Receive the DHCP request message that client sends, inquire about in the current available address resource pool and whether have the configurable I P address, if, be described client configuration IP address, and with the configuration the IP address send to described client by the DHCPACK message, otherwise, ignored request or return DHCP NACK message to described client.
2. the method for address pool protection of resources as claimed in claim 1 is characterized in that, described method also comprises:
The corresponding relation of pre-configured time period and IP number of addresses, wherein said corresponding relation is according to the statistical law setting of DHCP request message quantity in each time period.
3. the method for address pool protection of resources as claimed in claim 1 is characterized in that, described method also comprises:
When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not greater than the first threshold value of setting in advance in the described current available address resource pool, from described current available address resource pool, reclaim the IP address in described global address resource pool;
When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not less than the second threshold value of setting in advance in the described current available address resource pool, from described global address resource pool, extracts the IP address and be appended in the described current available address resource pool.
4. the method for address pool protection of resources as claimed in claim 1 is characterized in that, described method also comprises:
In described Dynamic Host Configuration Protocol server, set in advance the mac address range table, wherein, the corresponding high-priority users of the MAC Address in the described mac address range table;
When receiving the DHCP request that a plurality of users send, preferentially with IP address assignment to high-priority users.
5. the method for address pool protection of resources as claimed in claim 4 is characterized in that, described method further comprises:
When unappropriated IP address resource was not enough in current available address resource pool, recovery had been distributed to other outer users of described mac address range IP address in described current available address resource pool.
6. the device of an address pool protection of resources is applied to Dynamic Host Configuration Protocol server, it is characterized in that, described Dynamic Host Configuration Protocol server is provided with current available address resource pool and global address resource pool, and described device comprises:
The address resource allocation units are used for obtaining the IP number of addresses corresponding with current slot, extract the IP address of respective numbers from the global address resource pool, are configured in the described current available address resource pool;
The address resource processing unit, be used for receiving the DHCP request message that client sends, inquire about in the current available address resource pool and whether have the configurable I P address, if, be described client configuration IP address, and the IP address of configuration sent to described client by DHCP ACK message, otherwise, ignored request or return DHCP NACK message to described client.
7. the square device of address pool protection of resources as claimed in claim 6 is characterized in that, described device also comprises:
Dispensing unit, for the corresponding relation of pre-configured time period and IP number of addresses, wherein said corresponding relation is according to the statistical law setting of DHCP request message quantity in each time period.
8. the device of address pool protection of resources as claimed in claim 6 is characterized in that, described address resource allocation units are further used for:
When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not greater than the first threshold value of setting in advance in the described current available address resource pool, from described current available address resource pool, reclaim the IP address in described global address resource pool;
When the IP number of addresses of the configuration ratio that accounts for described IP number of addresses is not less than the second threshold value of setting in advance in the described current available address resource pool, from described global address resource pool, extracts the IP address and be appended in the described current available address resource pool.
9. the device of address pool protection of resources as claimed in claim 6 is characterized in that, described device further comprises:
The priority dispensing unit is used for setting in advance the mac address range table at described Dynamic Host Configuration Protocol server, wherein, and the corresponding high-priority users of the MAC Address in the described mac address range table;
Described priority dispensing unit is further used for, when receiving the DHCP request that a plurality of users send, preferentially with IP address assignment to high-priority users.
10. the device of address pool protection of resources as claimed in claim 9 is characterized in that, described priority dispensing unit is further used for:
When unappropriated IP address resource was not enough in current available address resource pool, recovery had been distributed to other outer users of described mac address range IP address in described current available address resource pool.
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| CN104994182A (en) * | 2015-06-15 | 2015-10-21 | 中国联合网络通信集团有限公司 | Method of adjusting address pool and apparatus thereof |
| CN106330652A (en) * | 2015-06-30 | 2017-01-11 | 中兴通讯股份有限公司 | Learning method and device of MAC address in virtual local area network of switch |
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| CN109347945A (en) * | 2018-10-12 | 2019-02-15 | 北京天融信网络安全技术有限公司 | A kind of method and apparatus of nslookup |
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Address after: Binjiang District and Hangzhou city in Zhejiang Province Road 310051 No. 68 in the 6 storey building Patentee after: Hangzhou Dipu Polytron Technologies Inc Address before: Binjiang District and Hangzhou city in Zhejiang Province Road 310051 No. 68 in the 6 storey building Patentee before: Hangzhou Dipu Technology Co., Ltd. |