CN114465926B - Recursive server monitoring method, device, equipment and storage medium - Google Patents
Recursive server monitoring method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention belongs to the technical field of computers, and discloses a recursive server monitoring method, a device, equipment and a storage medium. The domain name to be accessed is acquired from the preset domain name set, and is a nonexistent top-level domain name; accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server; generating a domain name resolution log according to a domain name resolution result, and writing the domain name resolution log into a preset log file; determining an unavailable period of the target recursive server based on a preset log file. The method comprises the steps of accessing a target recursive server by using a nonexistent top-level domain name, determining the current available state of the target recursive server according to a fed-back domain name resolution result, writing domain name resolution logs generated according to the domain name resolution result into a preset log file, and counting the domain name resolution results corresponding to the domain name resolution logs in the preset log file to determine the unavailable time period of the target recursive server.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a method, an apparatus, a device, and a storage medium for monitoring a recursive server.
Background
The traditional method for judging that the recursive server service is unavailable can only request a specific website through a browser, and then finds that the website cannot normally analyze the IP, the service is found to be unavailable at this time, but the starting time point of the unavailable service and the ending time point of the unavailable service cannot be accurately known, so that the time period and the time duration of the unavailable service, the influence caused by the unavailable service, the possible reasons of the unavailable service and the like are difficult to locate.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a recursive server monitoring method, a recursive server monitoring device, recursive server monitoring equipment and a recursive server monitoring storage medium, and aims to solve the technical problem that the prior art cannot determine the unavailable time period of a recursive server.
In order to achieve the above object, the present invention provides a recursive server monitoring method, comprising the steps of:
acquiring a domain name to be accessed from a preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name;
accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server;
generating a domain name resolution log according to a domain name resolution result, and writing the domain name resolution log into a preset log file;
determining an unavailable period of the target recursive server based on the preset log file.
Optionally, the step of generating a domain name resolution log according to the domain name resolution result, and writing the domain name resolution log into a preset log file includes:
reading a previous analysis log from a preset log file;
and if the domain name resolution result is inconsistent with the domain name resolution result in the previous resolution log, generating a domain name resolution log according to the domain name resolution result, and writing the domain name resolution log into a preset log file.
Optionally, the step of determining an unavailable period of the target recursive server based on the preset log file includes:
reading a domain name resolution log with a corresponding domain name resolution result as a first type result in the preset log file to obtain a first type log;
searching a domain name resolution log with a corresponding domain name resolution result as a second type result from the first type log forward in the preset log file to obtain a second type log corresponding to the first type log;
determining an unavailable time period of the target recursive server according to the first type of log and the second type of log.
Optionally, the step of accessing the target recursive server according to the domain name to be accessed includes:
acquiring a preset instruction template and acquiring an access address of a target recursive server;
filling the preset instruction template according to the access address and the domain name to be accessed to obtain a domain name access instruction;
and accessing the target recursive server through the domain name access instruction.
Optionally, after the step of accessing the target recursive server according to the domain name to be accessed and receiving the domain name resolution result fed back by the target recursive server, the method further includes:
if the domain name resolution result is a third type result, performing existence check on the domain name in the preset domain name set;
and removing the domain name passing the existence verification from the preset domain name set, and returning to the step of acquiring the domain name to be accessed from the preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name.
Optionally, the step of performing presence check on the domain name in the preset domain name set includes:
traversing the preset domain name set, and taking the traversed domain name as a domain name to be checked;
accessing a root domain name server according to the domain name to be verified, and receiving a domain name verification result fed back by the root domain name server;
determining whether the domain name to be checked exists according to the domain name checking result;
if the domain name to be checked exists, judging that the domain name to be checked passes the existence check;
and detecting whether the domain name which is not traversed exists in the preset domain name set, and if the domain name which is not traversed does not exist, finishing the traversal of the preset domain name set.
Optionally, the step of obtaining the domain name to be accessed from the preset domain name set, where the domain name to be accessed is a non-existent top-level domain name, includes:
acquiring a preset detection period, and generating a domain name detection condition according to the preset detection period;
monitoring the system operation time in real time, and acquiring a domain name to be accessed from a preset domain name set when the system operation time meets the domain name detection condition, wherein the domain name to be accessed is a nonexistent top-level domain name.
In addition, in order to achieve the above object, the present invention further provides a recursive server monitoring apparatus, including the following modules:
the domain name acquisition module is used for acquiring a domain name to be accessed from a preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name;
the service access module is used for accessing a target recursive server according to the domain name to be accessed and receiving a domain name resolution result fed back by the target recursive server;
the log generation module is used for generating a domain name resolution log according to a domain name resolution result and writing the domain name resolution log into a preset log file;
a time period determination module for determining an unavailable time period of the target recursive server based on the preset log file.
In addition, in order to achieve the above object, the present invention also provides a recursive server monitoring apparatus, including: a processor, a memory and a recursive server monitoring program stored on the memory and operable on the processor, the recursive server monitoring program when executed by the processor implementing the steps of the recursive server monitoring method as described above.
In addition, in order to achieve the above object, the present invention further provides a computer readable storage medium, on which a recursive server monitoring program is stored, which when executed implements the steps of the recursive server monitoring method as described above.
The domain name to be accessed is acquired from the preset domain name set, and is a nonexistent top-level domain name; accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server; generating a domain name resolution log according to a domain name resolution result, and writing the domain name resolution log into a preset log file; determining an unavailable period of the target recursive server based on a preset log file. The current available state of the target recursive server can be determined according to the fed back domain name resolution result, then the domain name resolution logs generated according to the domain name resolution result are written into the preset log file, and the unavailable time period of the target recursive server can be determined by counting the domain name resolution results corresponding to the domain name resolution logs in the preset log file.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a recursive server monitoring method according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a recursive server monitoring method according to a second embodiment of the present invention;
fig. 4 is a block diagram of a recursive server monitoring apparatus according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a recursive server monitoring device of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the electronic device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a recursive server monitoring program.
In the electronic apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the electronic device according to the present invention may be provided in a recursive server monitoring device, and the electronic device calls a recursive server monitoring program stored in the memory 1005 through the processor 1001 and executes the recursive server monitoring method provided in the embodiment of the present invention.
Referring to fig. 2, fig. 2 is a schematic flow diagram of a recursive server monitoring method according to a first embodiment of the present invention.
In this embodiment, the recursive server monitoring method includes the following steps:
step S10: and acquiring a domain name to be accessed from a preset domain name set, wherein the domain name to be accessed is a non-existent top-level domain name.
It should be noted that, the execution subject of this embodiment may be the recursive server monitoring device, and the recursive server monitoring device may be an electronic device such as a personal computer, a server, or the like, or may be other devices that can implement the same or similar functions.
It should be noted that the preset domain name set may be a set formed by aggregating a large number of non-existent top-level domain names, and the preset domain name set may be preset by a manager of the recursive server monitoring device. Wherein the non-existent top level domain name may be a top level domain name that is not used by any person or institution.
In a specific implementation, the monitoring of the recursive server is continuous, and therefore, the target recursive server needs to be accessed periodically, where a period may be set in advance by a manager of the recursive server monitoring device, and therefore, the step S10 in this embodiment may include:
acquiring a preset detection period, and generating a domain name detection condition according to the preset detection period;
monitoring the system operation time in real time, and acquiring a domain name to be accessed from a preset domain name set when the system operation time meets the domain name detection condition, wherein the domain name to be accessed is a nonexistent top-level domain name.
It should be noted that the preset detection period may be preset by a manager of the recursive server monitoring device according to actual needs, for example: setting the preset detection period to 1 second, and then generating domain name detection conditions as follows: triggered every second from the beginning of the system operation.
It can be understood that, if the system operation time satisfies the domain name detection condition, it indicates that it is necessary to detect whether the target recursive server is available at the time, and therefore, the domain name to be accessed needs to be acquired from the preset domain name server, and the subsequent steps are executed.
Step S20: and accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server.
It should be noted that the target recursive server may be a recursive server to be monitored, and the target recursive server may be specified by a manager of the recursive server monitoring device. When receiving the domain name to be accessed, the target recursive server performs domain name resolution on the domain name to be accessed, tries to acquire information such as a server IP address corresponding to the domain name to be accessed, and then returns a specific domain name resolution result.
The domain name resolution result can be divided into a first type result, a second type result and a third type result. Wherein, the target recursive server can resolve the domain name normally, and if the corresponding server IP address is not found, a first type result is returned, for example: returning NXDOMAIN; the target recursive server fails to resolve normally or the access times out, a second type of result is returned, for example: returning SERVFAIL or TIMEOUT; the target recursive server may resolve the domain name normally and may find the corresponding server IP address, and a third type of result is returned, such as: and returning the domain name and the server IP address corresponding to the domain name.
It can be understood that, if the domain name to be accessed is a top-level domain name that does not exist, the target recursive server accesses the root domain name server, and obtains a domain name resolution result corresponding to the domain name to be accessed from the root domain name server, and the root domain name server is maintained by an authority and is basically impossible to access, so that whether the target domain name server can be normally accessed can be judged according to the domain name resolution result.
In a specific implementation, in order to improve the monitoring efficiency of the target recursive server, a relatively efficient instruction may be used to access the target recursive server, and the step of accessing the target recursive server according to the domain name to be accessed in this embodiment may include:
acquiring a preset instruction template and acquiring an access address of a target recursive server;
filling the preset instruction template according to the access address and the domain name to be accessed to obtain a domain name access instruction;
and accessing the target recursive server through the domain name access instruction.
It should be noted that the access address of the target recursive server may be the IP address of the target recursive server. The preset instruction template may be an instruction template constructed according to a generation rule of an access instruction of the efficient recursive server, for example: the dig instruction has high efficiency in accessing the recursive server, and at this time, an instruction template can be constructed according to the generation rule of the dig instruction, and the preset instruction template is as follows: "dig @ $ { recursive _ ip } @ $ { tdl _ name }", where @ $ { recursive _ ip } is a placeholder corresponding to an access address of a domain name server to be accessed, and @ $ { tdl _ name } is a placeholder corresponding to a domain name to be accessed.
In actual use, the preset instruction template is filled according to the access address and the domain name to be accessed, and the domain name access instruction is obtained by replacing the placeholder in the preset instruction template according to the access address and the domain name to be accessed. Accessing the target recursive server via the domain name access instruction may be executing the domain name access instruction to access the target recursive server.
Step S30: and generating a domain name resolution log according to the domain name resolution result, and writing the domain name resolution log into a preset log file.
It should be noted that the preset log file may be a file for storing a domain name resolution log. The generating of the domain name resolution log according to the domain name resolution result may be acquiring a generation time corresponding to the domain name resolution result, and then filling the preset log template according to the domain name resolution result and the corresponding generation time, thereby obtaining the domain name resolution log.
For example: assuming that the domain name resolution result is NXDOMAIN and the corresponding generation time is 2021, 11, month, 27, 00, 05, 36 seconds, the preset log template may be filled, so as to obtain a domain name resolution log "[ 2021-11-2700: 05:36 status: NXDOMAIN ] ".
In actual use, writing the domain name resolution log into the preset log file may be writing the domain name resolution log into the file end of the preset log file. Of course, the specific writing rule may be adjusted according to actual needs, and this embodiment is not limited thereto.
Step S40: determining an unavailable period of the target recursive server based on the preset log file.
It should be noted that, because the domain name to be accessed is a top-level domain name that does not exist, the target recursive server accesses the root domain name server, and obtains a domain name resolution result corresponding to the domain name to be accessed from the root domain name server, and the root domain name server is maintained by an authority and is basically impossible to access, and whether the target domain name server can be normally accessed can be determined according to the domain name resolution result. Therefore, according to the domain name resolution result corresponding to each domain name resolution log stored in the preset log file, whether the target recursive server is available when the domain name resolution log is generated can be determined, and the state is counted, so that the unavailable time period of the target recursive server can be determined.
For example: assuming that 40 domain name resolution logs exist in the preset log file, wherein the domain name resolution result corresponding to the 1 st to 3 th domain name resolution logs is a first type result, the domain name resolution result corresponding to the 4 th to 10 th domain name resolution logs is a second type result, the domain name resolution result corresponding to the 11 th to 40 th domain name resolution logs is a first type result, it indicates that the target recursive server is available when generating the 1 st to 3 rd domain name resolution logs, the target recursive server is not available when the 4 th to 10 th domain name resolution logs are generated, the target recursive server is available when the 11 th to 40 th domain name resolution logs are generated, then, at this time, the generation time corresponding to the 4 th domain name resolution log is the starting time of the unavailable time period of the target recursive server, and the generation time corresponding to the 11 th domain name resolution log is the ending time of the unavailable time period of the target recursive server.
Further, as can be clearly seen from the above example, when the domain name resolution results corresponding to the consecutive domain name resolution logs are the same type of result, the only log actually determined to have the time period is actually used to determine that the state of the target recursive server changes, that is, the first log in the consecutive domain name resolution logs, and therefore not all domain name resolution logs need to be stored, at this time, the step S30 in this embodiment may include:
reading a previous analysis log from a preset log file;
and if the domain name resolution result is inconsistent with the domain name resolution result in the previous resolution log, generating a domain name resolution log according to the domain name resolution result, and writing the domain name resolution log into a preset log file.
It should be noted that the previous resolution log may be a domain name resolution log currently located at the end of a file in a preset log file.
In actual use, if the domain name resolution result does not match the domain name resolution result in the previous resolution log, this indicates that the state of the target recursive server has changed, for example: from available to unavailable or from unavailable to available. Therefore, at this time, a domain name resolution log may be generated according to the domain name resolution result, and then the domain name resolution log may be written into the preset log file.
It can be understood that only the domain name resolution log which can be used for determining the change of the state of the target recursive server is reserved, the determination of the unavailable time period of the target recursive server is not influenced, the number of logs in the preset log file can be reduced, and the storage space of the device is saved.
In a specific implementation, since the rule of the log storage is changed, correspondingly, the manner of determining the unavailable period of the target recursive server according to the preset log file may also be changed correspondingly, and then the step S40 in this embodiment may include:
reading a domain name resolution log with a corresponding domain name resolution result as a first type result in the preset log file to obtain the first type log;
searching a domain name resolution log with a corresponding domain name resolution result as a second type result from the first type log forward in the preset log file to obtain a second type log corresponding to the first type log;
determining an unavailable time period of the target recursive server according to the first type of log and the second type of log.
It should be noted that, if the domain name resolution result corresponding to the domain name resolution log is the first type result, it indicates that the target recursive server is in an available state when the domain name resolution log is generated; if the domain name resolution result corresponding to the domain name resolution log is the second type result, the target recursive server is in an unavailable state when the domain name resolution log is generated; and when the domain name resolution log is written into the preset log file, writing is carried out in a mode of writing the tail of the file, so that the second type log is searched forward from the first type log in the preset log file, and the specific time period when the state of the target recursive server is unavailable can be determined.
The domain name resolution log with the corresponding domain name resolution result as the second type result is searched forward from the first type log in the preset log file, and the second type log corresponding to the first type log is obtained.
Among these, there are many kinds of results due to the second type, such as: SERVFAIL and TIMEOUT, therefore, a plurality of domain name resolution logs corresponding to the second type result may be found, and at this time, if there are a plurality of domain name resolution logs corresponding to the second type result, the one with the earliest generation time is used as the second type log.
For example: assuming that a search is made from the first-type log B, there are domain name resolution logs C and D between the previous first-type log a, where the domain name resolution result is the second-type result, where C is generated earlier than D, and at this time C is taken as the second-type log corresponding to B.
In practical use, the determining the unavailable period of the target recursive server according to the first type log and the second type log may be to use the generation time corresponding to the second type log as an unavailable start time, use the generation time corresponding to the first type log as an unavailable end time, and use a period between the unavailable start time and the unavailable end time as the unavailable period.
For example: assuming that the generation time of a certain first type log is 2021 year 11 month 27 day 00 hour 08 minute 49 seconds, and the generation time of a first second type log searched forward from the first type log is 2021 year 11 month 27 day 00 hour 05 minute 36 seconds, the unavailable time period of the target recursive server is [ 2021-11-2700: 05:36] - [ 2021-11-2700: 08:49], and the unavailable time period is 3 minutes 13 seconds.
In the embodiment, the domain name to be accessed is acquired from the preset domain name set, and is a nonexistent top-level domain name; accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server; generating a domain name resolution log according to a domain name resolution result, and writing the domain name resolution log into a preset log file; determining an unavailable period of the target recursive server based on a preset log file. The method comprises the steps of accessing a target recursive server by using a nonexistent top-level domain name, determining the current available state of the target recursive server according to a fed-back domain name resolution result, writing domain name resolution logs generated according to the domain name resolution result into a preset log file, and counting the domain name resolution results corresponding to the domain name resolution logs in the preset log file to determine the unavailable time period of the target recursive server.
Referring to fig. 3, fig. 3 is a flowchart illustrating a recursive server monitoring method according to a second embodiment of the present invention.
Based on the first embodiment, after step S20, the recursive server monitoring method of this embodiment further includes:
step S30': and if the domain name resolution result is a third type result, performing existence check on the domain names in the preset domain name set.
It should be noted that, as time advances, some top-level domain names that do not exist originally may be used by some individuals or organizations, at this time, such top-level domain names may be cached by the target recursive server, the target recursive server may no longer need to access the root domain name server, and at this time, it is impossible to determine whether the target recursive server is available according to the domain name resolution result, and therefore, corresponding processing is required to remove such top-level domain names from the preset domain name set.
It can be understood that, if the domain name resolution result is the third type result, it indicates that the domain name to be accessed used at this time is already used by a person or an organization, at this time, the domain name resolution result obtained by using the domain name to be accessed is difficult to be used for determining whether the target recursive server is available, and at this time, it is also not determined whether other top-level domain names used by the person or the organization exist in the preset domain name set, so that the existence check needs to be performed on the domain names in the preset domain name set.
In a specific implementation, in order to ensure reliability of presence check on a domain name, the step of performing presence check on the domain name in the preset domain name set according to this embodiment may include:
traversing the preset domain name set, and taking the traversed domain name as a domain name to be checked;
accessing a root domain name server according to the domain name to be verified, and receiving a domain name verification result fed back by the root domain name server;
determining whether the domain name to be checked exists according to the domain name checking result;
if the domain name to be checked exists, judging that the domain name to be checked passes the existence check;
and detecting whether the domain name which is not traversed exists in the preset domain name set, and if the domain name which is not traversed does not exist, finishing the traversal of the preset domain name set.
It can be understood that, because the root domain name server is maintained by the authority, the root domain name server is unlikely to have an inaccessible phenomenon, and therefore, the domain name to be checked can be sent to the root domain name server for resolution and check, and then whether the domain name to be checked exists is determined according to the domain name check result fed back by the root domain name server, and if the domain name to be checked exists, it indicates that the domain name to be checked is already used by some individuals or organizations, that is, the domain name to be checked already exists, and therefore, it can be determined that the domain name to be checked passes presence check at this time.
It can be understood that, if no domain name that is not traversed exists in the preset domain name set, it indicates that presence verification has been performed on all domain names in the preset domain name set, and then traversal of the preset domain name set may be stopped at this time. If the domain name which is not traversed exists in the preset domain name set, the existence check of the domain name which is not traversed exists in the preset domain name set is indicated, and the preset domain name set can be continuously traversed at the moment.
Step S40': and removing the domain name passing the existence verification from the preset domain name set, and returning to the step of acquiring the domain name to be accessed from the preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name.
It should be noted that, if a domain name passes the existence check, it indicates that the domain name has been used by a person or an organization, that is, the domain name already exists, and the domain name resolution result obtained by accessing the target recursive server according to the domain name cannot be used to determine whether the target recursive server is available, so that the domain name passing the existence check needs to be removed from the preset domain name set, and then the domain name to be accessed is obtained from the preset domain name set again, and the target recursive server is accessed again.
In this embodiment, when the domain name resolution result is the third type result, the presence check is performed on the domain name in the preset domain name set; and removing the domain name passing the existence verification from the preset domain name set, and returning to the step of acquiring the domain name to be accessed from the preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name. Because the domain name resolution result is the third type result, the domain name used for accessing the target recursive server is used by an individual or an organization at the moment, the domain names in the preset domain name set are subjected to existence check at the moment, and the domain names passing the existence check are removed from the preset domain name set, so that the domain names in the preset domain name set are all top-level domain names which do not exist, and the normal operation of the recursive server monitoring method is ensured.
Furthermore, an embodiment of the present invention further provides a storage medium, where the storage medium stores a recursive server monitoring program, and the recursive server monitoring program, when executed by a processor, implements the steps of the recursive server monitoring method as described above.
Referring to fig. 4, fig. 4 is a block diagram illustrating a recursive server monitoring apparatus according to a first embodiment of the present invention.
As shown in fig. 4, the recursive server monitoring apparatus according to the embodiment of the present invention includes:
the domain name acquisition module 10 is configured to acquire a domain name to be accessed from a preset domain name set, where the domain name to be accessed is a top-level domain name that does not exist;
the service access module 20 is configured to access a target recursive server according to the domain name to be accessed, and receive a domain name resolution result fed back by the target recursive server;
the log generating module 30 is configured to generate a domain name resolution log according to a domain name resolution result, and write the domain name resolution log into a preset log file;
a time period determining module 40, configured to determine an unavailable time period of the target recursive server based on the preset log file.
In the embodiment, the domain name to be accessed is acquired from the preset domain name set, and is a nonexistent top-level domain name; accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server; generating a domain name resolution log according to a domain name resolution result, and writing the domain name resolution log into a preset log file; determining an unavailable period of the target recursive server based on a preset log file. The method comprises the steps of accessing a target recursive server by using a nonexistent top-level domain name, determining the current available state of the target recursive server according to a fed-back domain name resolution result, writing domain name resolution logs generated according to the domain name resolution result into a preset log file, and counting the domain name resolution results corresponding to the domain name resolution logs in the preset log file to determine the unavailable time period of the target recursive server.
Further, the log generating module 30 is further configured to read a previous analysis log from a preset log file; and if the domain name resolution result is inconsistent with the domain name resolution result in the previous resolution log, generating a domain name resolution log according to the domain name resolution result, and writing the domain name resolution log into a preset log file.
Further, the time interval determining module 40 is further configured to read a domain name resolution log in which a domain name resolution result corresponding to the preset log file is a first type result, and obtain the first type log; searching a domain name resolution log with a corresponding domain name resolution result as a second type result from the first type log forward in the preset log file to obtain a second type log corresponding to the first type log; determining an unavailable time period of the target recursive server according to the first type of log and the second type of log.
Further, the service access module 20 is further configured to obtain a preset instruction template and obtain an access address of the target recursive server; filling the preset instruction template according to the access address and the domain name to be accessed to obtain a domain name access instruction; and accessing the target recursive server through the domain name access instruction.
Further, the service access module 20 is further configured to perform existence check on the domain name in the preset domain name set if the domain name resolution result is a third type result; and removing the domain name passing the existence verification from the preset domain name set, and returning to the step of acquiring the domain name to be accessed from the preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name.
Further, the service access module 20 is further configured to traverse the preset domain name set, and use the traversed domain name as a domain name to be checked; accessing a root domain name server according to the domain name to be verified, and receiving a domain name verification result fed back by the root domain name server; determining whether the domain name to be checked exists according to the domain name checking result; if the domain name to be checked exists, judging that the domain name to be checked passes the existence check; and detecting whether the domain name which is not traversed exists in the preset domain name set, and if the domain name which is not traversed does not exist, finishing the traversal of the preset domain name set.
Further, the domain name obtaining module 10 is further configured to obtain a preset detection period, and generate a domain name detection condition according to the preset detection period; monitoring the system operation time in real time, and acquiring a domain name to be accessed from a preset domain name set when the system operation time meets the domain name detection condition, wherein the domain name to be accessed is a nonexistent top-level domain name.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may refer to the recursive server monitoring method provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A recursive server monitoring method, comprising:
acquiring a domain name to be accessed from a preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name which is not used by an individual or an organization;
accessing a target recursive server according to the domain name to be accessed, and receiving a domain name resolution result fed back by the target recursive server;
generating a domain name resolution log according to a domain name resolution result, and writing the domain name resolution log into a preset log file;
determining an unavailable period of the target recursive server based on the preset log file;
the preset log file comprises a domain name analysis log, a first type result and a second type result, wherein the corresponding domain name analysis result is a domain name analysis log of the first type result or the second type result; the first type result is that the target recursive server can normally resolve the domain name, and a corresponding server IP address is not found; the second type result is that the target recursive server cannot normally resolve the domain name or the access is overtime;
the step of determining an unavailable period of the target recursive server based on the preset log file includes:
reading a domain name resolution log with a corresponding domain name resolution result as a first type result in the preset log file to obtain a first type log;
searching a domain name resolution log with a corresponding domain name resolution result as a second type result from the first type log forwards in the preset log file to obtain a second type log corresponding to the first type log;
determining an unavailable time period of the target recursive server according to the first type of log and the second type of log.
2. The recursive server monitoring method according to claim 1, wherein the step of generating a domain name resolution log according to the domain name resolution result and writing the domain name resolution log into a preset log file comprises:
reading a previous analysis log from a preset log file;
and if the domain name resolution result is inconsistent with the domain name resolution result in the previous resolution log, generating a domain name resolution log according to the domain name resolution result, and writing the domain name resolution log into a preset log file.
3. The recursive server monitoring method according to claim 1, wherein the step of accessing the target recursive server according to the domain name to be accessed comprises:
acquiring a preset instruction template and acquiring an access address of a target recursive server;
filling the preset instruction template according to the access address and the domain name to be accessed to obtain a domain name access instruction;
and accessing the target recursive server through the domain name access instruction.
4. The recursive server monitoring method according to claim 1, wherein after the step of accessing the target recursive server according to the domain name to be accessed and receiving the domain name resolution result fed back by the target recursive server, the method further comprises:
if the domain name resolution result is a third type result, performing existence check on the domain name in the preset domain name set;
and removing the domain name passing the existence verification from the preset domain name set, and returning to the step of acquiring the domain name to be accessed from the preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name.
5. The recursive server monitoring method according to claim 4, wherein the step of performing presence check on the domain names in the preset domain name set comprises:
traversing the preset domain name set, and taking the traversed domain name as a domain name to be checked;
accessing a root domain name server according to the domain name to be verified, and receiving a domain name verification result fed back by the root domain name server;
determining whether the domain name to be checked exists according to the domain name checking result;
if the domain name to be checked exists, judging that the domain name to be checked passes the existence check;
and detecting whether the domain name which is not traversed exists in the preset domain name set, and if the domain name which is not traversed does not exist, finishing the traversal of the preset domain name set.
6. The recursive server monitoring method according to any one of claims 1 to 5, wherein the step of obtaining the domain name to be accessed from a preset domain name set, the domain name to be accessed being a non-existent top-level domain name, comprises:
acquiring a preset detection period, and generating a domain name detection condition according to the preset detection period;
monitoring the system operation time in real time, and acquiring a domain name to be accessed from a preset domain name set when the system operation time meets the domain name detection condition, wherein the domain name to be accessed is a nonexistent top-level domain name.
7. A recursive server monitoring apparatus, comprising:
the domain name acquisition module is used for acquiring a domain name to be accessed from a preset domain name set, wherein the domain name to be accessed is a nonexistent top-level domain name which is not used by an individual or an organization;
the service access module is used for accessing a target recursive server according to the domain name to be accessed and receiving a domain name resolution result fed back by the target recursive server;
the log generation module is used for generating a domain name resolution log according to a domain name resolution result and writing the domain name resolution log into a preset log file;
a time period determination module for determining an unavailable time period of the target recursive server based on the preset log file;
the preset log file comprises a domain name analysis log, a first type result and a second type result, wherein the corresponding domain name analysis result is a domain name analysis log of the first type result or the second type result; the first type result is that the target recursive server can normally resolve the domain name, and a corresponding server IP address is not found; the second type result is that the target recursive server cannot normally resolve the domain name or the access is overtime;
the time interval determining module is further configured to read a domain name resolution log in which a domain name resolution result corresponding to the preset log file is a first type result, and obtain the first type log; searching a domain name resolution log with a corresponding domain name resolution result as a second type result from the first type log forward in the preset log file to obtain a second type log corresponding to the first type log; determining an unavailable time period of the target recursive server according to the first type of log and the second type of log.
8. A recursive server monitoring device, comprising: a processor, a memory, and a recursive server monitoring program stored on the memory and executable on the processor, the recursive server monitoring program when executed by the processor implementing the steps of the recursive server monitoring method as recited in any one of claims 1-6.
9. A computer readable storage medium having stored thereon a recursive server monitoring program which, when executed, performs the steps of the recursive server monitoring method according to any one of claims 1 to 6.
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| US20100106854A1 (en) * | 2008-10-29 | 2010-04-29 | Hostway Corporation | System and method for controlling non-existing domain traffic |
| US8676989B2 (en) * | 2009-04-23 | 2014-03-18 | Opendns, Inc. | Robust domain name resolution |
| CN105391818B (en) * | 2015-11-26 | 2019-02-05 | 中国互联网络信息中心 | A kind of authoritative domain name emergency analysis system and method based on recursion server |
| CN106888280A (en) * | 2017-03-29 | 2017-06-23 | 北京奇虎科技有限公司 | DNS update methods, apparatus and system |
| CN107819895B (en) * | 2017-11-16 | 2019-12-31 | 哈尔滨工业大学（威海） | Top-level domain name configuration and security analysis method based on domain resource records |
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