CN107995107A - One kind combats a natural disaster to become campus network DNS systems and its combats a natural disaster change method - Google Patents

One kind combats a natural disaster to become campus network DNS systems and its combats a natural disaster change method Download PDF

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Publication number
CN107995107A
CN107995107A CN201810010068.6A CN201810010068A CN107995107A CN 107995107 A CN107995107 A CN 107995107A CN 201810010068 A CN201810010068 A CN 201810010068A CN 107995107 A CN107995107 A CN 107995107A
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CN
China
Prior art keywords
dns
network
module
natural disaster
education
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Pending
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CN201810010068.6A
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Chinese (zh)
Inventor
霍跃华
孙雁宇
杨海疆
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China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Priority to CN201810010068.6A priority Critical patent/CN107995107A/en
Publication of CN107995107A publication Critical patent/CN107995107A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/28Routing or path finding of packets in data switching networks using route fault recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/74Address processing for routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/45Network directories; Name-to-address mapping
    • H04L61/4505Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
    • H04L61/4511Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/45Network directories; Name-to-address mapping
    • H04L61/4552Lookup mechanisms between a plurality of directories; Synchronisation of directories, e.g. metadirectories
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004Server selection for load balancing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004Server selection for load balancing
    • H04L67/1023Server selection for load balancing based on a hash applied to IP addresses or costs

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Combat a natural disaster to become campus network DNS systems the invention discloses one kind and its combat a natural disaster change method.When the education network circuit of campus network export breaks down, the data flow of the campus network DNS of education network mandate will interrupt, and cause campus network DNS to be parsed to website domain name address outside school, influence access of the campus user to website outside school.The system mainly includes dns server, combats a natural disaster to become DNS gateway modules, load balancing module, education network DNS roots AM access module and calamity for DNS root AM access modules.Combat a natural disaster to become DNS gateway modules by adding, judge when the AM access module of education network DNS roots is broken down, automatically switch to DNS catastrophe operating modes, the pattern solve thes problems, such as that campus network DNS of the colleges and universities in deployment education network mandate since the campus user that the catastrophe of education network DNS root AM access module working statuses triggers can not use this school dns server parsing website outside school, improves anti-accident ability during campus network DNS deployment.

Description

One kind combats a natural disaster to become campus network DNS systems and its combats a natural disaster change method
Technical field
Combat a natural disaster to become campus network DNS systems the present invention relates to one kind and its combat a natural disaster change method, the system be related to source address by Technology and SNMP technologies.
Background technology
DNS (Domain Name System) domain name analysis system, is mainly used for solving Web site www nets in internet The problem of location IP address corresponding with its matches, is one of basal core service of internet.Chinese education and scientific research computer Net (abbreviation education network) is China's investment construction, is managed by the Ministry of Education, and the whole nation that construction and operation are undertaken by the colleges and universities that take the lead is academic Computer interconnected network.During Construction of University campus network, it will usually which selection provides domain name by the campus network DNS of education network mandate Analysis service, is flowed out and flowed into from education network egress line by the campus network DNS data stream acquiescence of education network mandate.In education network During egress line catastrophe, the campus network DNS data stream of mandate will interrupt, and cause campus network DNS cannot to domain name outside school Location is parsed, and influences access of the campus user to website outside school.
In order to solve the campus user that the campus network DNS of University Education net mandate triggers due to the catastrophe of education network egress line The problem of campus network dns server can not being used to parse website outside school.One kind is devised to combat a natural disaster to become campus network DNS systems and its resist Catastrophe method, improves anti-accident ability during campus network DNS system deployments.
The content of the invention
Combat a natural disaster to become campus network DNS systems it is an object of the invention to provide one kind and its combat a natural disaster change method, the present invention can be with , there is calamity in education network DNS root AM access module working statuses in the effective campus network DNS systems solved by education network mandate During change, the problem of campus user can not parse resource outside school, greatly improve the availability of campus network DNS systems and combat a natural disaster to become Ability, good guarantee is provided for the stable operation of campus network.
To achieve the above object, the technical scheme is that:One kind combats a natural disaster to become campus network DNS systems, including DNS service Device, combat a natural disaster to become DNS gateway modules, load balancing module, education network DNS roots AM access module and calamity for the access of DNS roots Module;
The dns server and combat a natural disaster to become the first network interface of DNS gateway modules and communicate to connect, in the school and outside school domain name Parsing, the dns server receives Client-initiated DNS request, and is sent to and combats a natural disaster to become DNS gateway modules, receives at the same time Combat a natural disaster to become network address and IP address that DNS gateway modules obtain, and be sent to user;
Second network interface for combating a natural disaster to become DNS gateway modules is communicated to connect with load balancing module, described to combat a natural disaster to become DNS nets Close module to be used to detect education network DNS root AM access module working statuses, if the AM access module of education network DNS roots is in just Normal working status, then the DNS data by education network mandate load balancing module is sent to by switch module;If detect religion Educate net DNS root AM access modules working status and catastrophe occurs, then provide and combat a natural disaster to become DNS lists, replace original education network mandate DNS, will combat a natural disaster change DNS data and is sent to load balancing module by switch module;
The load balancing module is respectively with education network DNS roots AM access module and calamity for DNS root AM access modules Communication connection, the load balancing module are used for when the AM access module of education network DNS roots is in normal operating conditions, will DNS data send education network DNS root AM access modules to, and catastrophe work shape is in the AM access module of education network DNS roots During state, it will combat a natural disaster to become DNS data and spread and give calamity for DNS root AM access modules;
The education network DNS roots AM access module is used to connect education network, ensures education network DNS root AM access modules Network service under normal circumstances;The calamity is used to connect calamity for carrier network for the AM access module of DNS roots, realizes and is teaching There is net can use when educating net DNS root AM access module catastrophe states.
Further, system according to the present invention, it is described to combat a natural disaster to become DNS gateway modules by control processor, first Network interface, the second network interface and detecting module composition, combat a natural disaster change DNS gateway modules and are series in campus network dns server routing link, The control processor is communicated to connect with detecting module, and the control processor is connected by the first network interface with dns server, institute Control processor is stated to be connected with switch module by the second network interface.
Further, system according to the present invention, first network interface include 1 DNS access gigabit network interface and are used for Dns server, second network interface include 1 gigabit and export the output that network interface is used for DNS data, and the detecting module includes 1 A gigabit network interface is detected the education network discharge state in load-balancing device for accessing campus network, obtained inspection State output is surveyed to control processor, control processor is used to analyze and process education network DNS root AM access module normal conditions The trend of DNS data stream and data source of the calamity for dns address is automatically updated under lower and catastrophic condition.
Further, system according to the present invention, the system comprises double logics route to test, the load balancing Module is connected by A circuits with education network DNS root AM access modules, and education network DNS root AM access modules working status is just In the case of often, A circuits are walked in dns resolution request;The load balancing module accesses mould by B circuits and calamity for DNS roots Block is connected, and in the case of education network DNS root AM access module working status catastrophe, B circuits are walked in dns resolution request.
Further, system according to the present invention, it is described to combat a natural disaster to become DNS nets the system comprises switch module Module is closed to communicate to connect by switch module and load balancing module.
Present invention also offers it is a kind of combat a natural disaster to become campus network DNS systems combat a natural disaster change method, step is as follows:
(1) DNS request is initiated by user, and DNS data stream is sent to by dns server and combats a natural disaster to become DNS modules, institute The working status for combating a natural disaster to become the detecting education network DNS root AM access modules of DNS gateway modules is stated, judges education network DNS roots Whether AM access module working status is normal.
(2) if the AM access module of education network DNS roots is in normal operating conditions, by the DNS data of education network mandate Spread and give load balancing module, under the action of load balancing module, send the DNS data of education network mandate to education network DNS root AM access modules, obtain education network DNS root data, obtain network address and IP address;If education network DNS roots Catastrophe occurs for AM access module working status, combats a natural disaster change DNS gateway module acquisitions and combats a natural disaster to become DNS lists, replaces original education network and award The DNS data of power, combats a natural disaster to become DNS data and spreads to load balancing module, it is standby that load balancing module sends DNS data to calamity DNS root AM access modules, obtain calamity for DNS root data, obtain network address and IP address.
(3) effect is bi-directionally connected by link, the network address and IP address that above-mentioned steps 2 are acquired pass to load Balance module, under the action of switch module, combats a natural disaster to become DNS gateway modules acquisition data flow, and passes to dns server, Network address and IP address are passed to the user for initiating request by dns server, and user's is normal when being effectively guaranteed generation catastrophe Communication.
Described combats a natural disaster change method, it is characterised in that:In the step (1), education network DNS root AM access modules are judged The whether normal method of working status is:When combat a natural disaster become DNS gateway modules receive DNS data stream after, every setting time pair Whether education network DNS root AM access modules working status normally judges once that education network DNS roots connect if judging three times Enter module working status exception, then finally judge that catastrophe occurs for education network DNS root AM access modules working status, otherwise, religion It is normal to educate net DNS root AM access module working statuses.The AM access module of education network DNS roots is normal and the working status of catastrophe Represent education network network state is normal and catastrophe.
The beneficial effect that the present invention reaches:Combat a natural disaster to become DNS gateway modules by introducing, when education network DNS roots access When module breaks down, DNS catastrophe operating modes are automatically switched to, in this mode, according to source address routing policy, by DNS Server is remapped to calamity for domain name mapping is carried out on dns server address, and this addresses the problem occur when education network circuit During failure, the problem of campus user normally accesses network can be influenced.
Brief description of the drawings
Fig. 1 is to combat a natural disaster to become campus network DNS system connection figures.
Fig. 2 is to combat a natural disaster to become campus network DNS system gateway module connection figures.
Fig. 3 is to combat a natural disaster to become campus network DNS working-flow figures.
Fig. 4 is determining program flow chart.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention will be further described in detail
1. it is to combat a natural disaster to become DNS system connection figures as shown in Figure 1.
(1) combat a natural disaster to become DNS gateway modules by being connected in campus network dns server routing link, when education network exports During failure, which, which can enable rapidly, combats a natural disaster to become DNS gateway modules, at this moment will just intercept and capture DNS data stream, according to source Location routing policy, will enable calamity for DNS data source, the data flow of DNS is directed to the calamity of other outbounds for DNS sources Domain name mapping is carried out, can be the campus network users normally Internet resources of parsing in the school and outside school.
(2) under normal circumstances, DNS data flows away to for A circuits, and DNS request is initiated by user, by dns server, Combat a natural disaster to become under the action of DNS gateway modules, data flow is transmitted to switch module, under the action of load balancing module, passes through line Road A, sends DNS data to education network DNS root AM access modules, obtains education network DNS root data, obtain network address and IP address.Effect is bi-directionally connected by link, load balancing module is being passed to, under the action of switch module, is combating a natural disaster Become DNS gateway modules and obtain data flow, network address and corresponding IP address are passed to the user for initiating request by dns server.
(3) under catastrophic condition, DNS data flows away to for B circuits, and DNS request is initiated by user, by dns server, Combat a natural disaster to become under the action of DNS gateway modules, there is provided to combat a natural disaster to become DNS lists, replace original DNS, data flow is transmitted to switch module, Under the action of load balancing module, by circuit B, send DNS data to calamity standby net DNS root AM access modules, obtain The standby net DNS root data of calamity, obtain network address and IP address.Effect is bi-directionally connected by link, then passes to load balancing Module, under the action of switch module, combats a natural disaster to become DNS gateway modules and obtains data flow, and DNS servers are by network address and correspondence IP passes to the user for initiating request, is effectively guaranteed the normal communication of user when catastrophe occurs.
Combat a natural disaster to become campus network DNS system gateway module connection figures 2. being illustrated in figure 2, mainly include:
(1) control processor:It is responsible for being handled the information of the first network interface, the second network interface, detecting module, calamity is occurring There is provided during change and combat a natural disaster to become DNS lists, replace original education network mandate DNS, ensure the normal network service of user;At selected control Device model IBM X3650M4 are managed, system supports network readezvous point bridge joint, the Linux of SNMP, IPTABLES, this hair to be compiled The bright middle linux kernel version used is 2.4.31.Program is arranged to examine for every 3 seconds with linux timed tasks (crontab) Survey once, ensure the availability of DNS.
(2) first network interfaces, including 1 DNS access gigabit network interface, for the transmitted in both directions to DNS data;Using SFP- GE-T gigabit power port SFP modules, SFP-GE-T gigabit power port SFP module dissipations are low, performance is stablized, and transmission rate is up to 1.25G b/s。
(3) second network interfaces, including 1 gigabit output network interface, the transmitted in both directions for the DNS data between interchanger; Using RJ45 interfaces.
(4) detecting module, including a network interface with control process chip, for detecting circuit working status, will examine The state output measured is to control processor;Using TCP232-T modules, TCP232-T modules support serial ports configuration and network Configuration feature, network interface have adaptive ability.
As shown in figure 3, the work flow diagram for gateway of the present invention.
(1) DNS request (101) is initiated by user, by dns server (102), by combating a natural disaster to become DNS gateway modules (103) line status is detected, by judging education network DNS root AM access module working statuses, judges whether network is normal (104)。
(2) if catastrophe does not occur, data flow is transmitted to switch module (106), the effect in load balancing module (107) Under, send DNS data to education network DNS roots AM access module (108), obtain education network DNS root data, obtain net Location and IP address (110);If generation catastrophe, under the action of combating a natural disaster to become DNS gateway modules (103), acquisition combats a natural disaster to become DNS row Table (105), replaces original DNS, and data flow is transmitted to switch module (106), will under the action of load balancing module (107) DNS data sends calamity to for DNS roots AM access module (109), obtains calamity for DNS root data, with obtaining network address and IP Location (110).
(3) effect is bi-directionally connected by link, the network address and IP address (110) that above-mentioned steps 2 are acquired are transmitted Load balancing module (107) is given, under the action of switch module (106), combats a natural disaster to become DNS gateway modules (103) acquisition data Network address and IP address (111) are passed to the user for initiating request, are effectively guaranteed generation catastrophe by stream, dns server (102) When user normal communication.
As shown in figure 4, it is determining program work flow diagram.
(1) (201), when DNS data stream is after combating a natural disaster to become DNS gateway modules, startup judges that education network DNS roots connect Enter whether module works normally program (201).
(2) (202), judge whether an education network DNS roots AM access module works normally for 3 seconds, if normal work, DNS data flows trend is switch module (106);If education network DNS root AM access module working status catastrophe, under execution One jumps determining program.
(3) (203), judge whether an education network DNS roots AM access module works normally for 6 seconds, if normal work, DNS data flows trend is switch module (106);If education network DNS root AM access module working status catastrophe, under execution One jumps determining program.
(4) (204), judge whether an education network DNS roots AM access module works normally for 9 seconds, if normal work, DNS data flows trend is switch module (106);If education network DNS root AM access module working status catastrophe, under execution One jumps determining program.
(5) (205), after judging three times by (202), (203), (204), education network DNS roots AM access module work The equal catastrophe of state, acquisition combat a natural disaster to become DNS lists.
The present invention is solved in education network DNS root AM access module working status catastrophe, and campus user can not parse Outside school the problem of resource, the anti-accident ability of campus network DNS systems is on the one hand improved, on the other hand stablizes fortune for campus network Row provides guarantee.

Claims (7)

1. one kind combats a natural disaster to become campus network DNS systems, the system mainly includes:Dns server, combat a natural disaster to become DNS gateway modules, bear Balance module, education network DNS roots AM access module and calamity are carried for DNS root AM access modules;
The dns server and combat a natural disaster to become the first network interface of DNS gateway modules and communicate to connect, for the in the school and outside school solution of domain name Analysis, the dns server receive Client-initiated DNS request, and are sent to and combat a natural disaster to become DNS gateway modules, while receive and combat a natural disaster Become network address and IP address that DNS gateway modules obtain, and be sent to user;
Second network interface for combating a natural disaster to become DNS gateway modules is communicated to connect with load balancing module, described to combat a natural disaster to become DNS gateway moulds Block is used to detect education network DNS root AM access module working statuses, if the AM access module of education network DNS roots is in normal work Make state, then the DNS data by education network mandate is sent to load balancing module by switch module;If detect education network Catastrophe occurs for DNS root AM access modules working status, then provides and combat a natural disaster to become DNS lists, replace original education network mandate DNS, It will combat a natural disaster change DNS data and load balancing module is sent to by switch module;
The load balancing module communicates with education network DNS roots AM access module and calamity for DNS root AM access modules respectively Connection, the load balancing module is used for when the AM access module of education network DNS roots is in normal operating conditions, by DNS numbers According to sending education network DNS root AM access modules to, when the AM access module of education network DNS roots is in catastrophe working status, It will combat a natural disaster to become DNS data and spread and give calamity for DNS root AM access modules;
The education network DNS roots AM access module is used to connect education network, ensures that education network DNS root AM access modules are normal In the case of network service;The calamity is used to connect calamity for carrier network for the AM access module of DNS roots, realizes in education network There is net can use during DNS root AM access module catastrophe states.
2. the system as claimed in claim 1, it is characterised in that:It is described to combat a natural disaster to become DNS gateway modules by control processor, first Network interface, the second network interface and detecting module composition, combat a natural disaster change DNS gateway modules and are series in campus network dns server routing link, The control processor is communicated to connect with detecting module, and the control processor is connected by the first network interface with dns server, institute Control processor is stated to be connected with switch module by the second network interface.
3. system as claimed in claim 2, it is characterised in that:First network interface includes 1 DNS access gigabit network interface and is used for Dns server, second network interface include 1 gigabit and export the output that network interface is used for DNS data, and the detecting module includes 1 A gigabit network interface is detected the education network discharge state in load-balancing device for accessing campus network, obtained inspection State output is surveyed to control processor, control processor is used to analyze and process education network DNS root AM access module normal conditions The trend of DNS data stream and data source of the calamity for dns address is automatically updated under lower and catastrophic condition.
4. the system as claimed in claim 1, it is characterised in that:The system comprises double logics route to test, and the load is equal Weighing apparatus module is connected by A circuits with education network DNS root AM access modules, education network DNS root AM access module working statuses In the case of normal, A circuits are walked in dns resolution request;The load balancing module is accessed by B circuits and calamity for DNS roots Module is connected, and in the case of education network DNS root AM access module working status catastrophe, B circuits are walked in dns resolution request.
5. the system as claimed in claim 1, it is characterised in that:It is described to combat a natural disaster to become DNS nets the system comprises switch module Module is closed to communicate to connect by switch module and load balancing module.
6. a kind of combat a natural disaster change method using system as claimed in claim 1, it is characterised in that:Step is as follows:
(1) DNS request is initiated by user, and DNS data stream is sent to by dns server and combats a natural disaster to become DNS modules, it is described anti- Catastrophe DNS gateway modules detect the working status of education network DNS root AM access modules, judge that education network DNS roots access Whether module working status is normal.
(2) if the AM access module of education network DNS roots is in normal operating conditions, the DNS data of education network mandate is spread Load balancing module is given, under the action of load balancing module, sends the DNS data of education network mandate to education network DNS Root AM access module, obtains education network DNS root data, obtains network address and IP address;If education network DNS roots access Catastrophe occurs for module working status, combats a natural disaster change DNS gateway module acquisitions and combats a natural disaster to become DNS lists, replaces original education network mandate DNS data, combats a natural disaster to become DNS data and spreads and send DNS data to calamity for DNS roots to load balancing module, load balancing module Catalogue AM access module, obtains calamity for DNS root data, obtains network address and IP address.
(3) effect is bi-directionally connected by link, the network address and IP address that above-mentioned steps 2 are acquired pass to load balancing Module, under the action of switch module, combats a natural disaster to become DNS gateway modules acquisition data flow, and passes to dns server, DNS clothes Network address and IP address are passed to the user for initiating request by business device, are effectively guaranteed the normal communication of user when catastrophe occurs.
7. according to claim 6 combat a natural disaster change method, it is characterised in that:In the step (1), education network DNS roots are judged The whether normal method of catalogue AM access module working status is:When combat a natural disaster become DNS gateway modules receive DNS data stream after, often Whether education network DNS root AM access modules working status is normally judged once every setting time, if judging education three times It is abnormal to net DNS root AM access modules working status, then finally judges that education network DNS root AM access modules working status occurs Catastrophe, otherwise, education network DNS root AM access module working statuses are normal.The AM access module of education network DNS roots is normal and calamity The working status of change be represent education network network state is normal and catastrophe.
CN201810010068.6A 2018-01-05 2018-01-05 One kind combats a natural disaster to become campus network DNS systems and its combats a natural disaster change method Pending CN107995107A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101465768A (en) * 2009-01-12 2009-06-24 上海及第熊软件科技有限公司 Method and system for implementing website disaster-tolerating and error-tolerating operation
CN104468244A (en) * 2014-12-31 2015-03-25 北京奇虎科技有限公司 Domain name resolution system disaster recovery construction method and device
CN104639366A (en) * 2014-12-31 2015-05-20 北京奇虎科技有限公司 DNS (domain name server) disaster tolerance system islanding response automatic switching method and device
US20170048187A1 (en) * 2014-04-18 2017-02-16 Beijing Qihoo Technology Company Limited Dns security system and failure processing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101465768A (en) * 2009-01-12 2009-06-24 上海及第熊软件科技有限公司 Method and system for implementing website disaster-tolerating and error-tolerating operation
US20170048187A1 (en) * 2014-04-18 2017-02-16 Beijing Qihoo Technology Company Limited Dns security system and failure processing method
CN104468244A (en) * 2014-12-31 2015-03-25 北京奇虎科技有限公司 Domain name resolution system disaster recovery construction method and device
CN104639366A (en) * 2014-12-31 2015-05-20 北京奇虎科技有限公司 DNS (domain name server) disaster tolerance system islanding response automatic switching method and device

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