KR20090088031A - The method and system of connecting internet using keyword based on dns - Google Patents

The method and system of connecting internet using keyword based on dns Download PDF

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Publication number
KR20090088031A
KR20090088031A KR1020080013329A KR20080013329A KR20090088031A KR 20090088031 A KR20090088031 A KR 20090088031A KR 1020080013329 A KR1020080013329 A KR 1020080013329A KR 20080013329 A KR20080013329 A KR 20080013329A KR 20090088031 A KR20090088031 A KR 20090088031A
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packet
keyword
server
access
dns
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KR1020080013329A
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조관현
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조관현
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    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/10—Services

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Abstract

A method and a system of connecting to the Internet by using a keyword based on DNS are provided to supply a smooth keyword connection by reducing a traffic load of a keyword connection service server. A DNS(Domain Name Server) searches the IP(Internet Protocol) address of a keyword access service sever(300), and a web browser transmits an input string packet to the searched IP address(310). The keyword access service server analyzes the transmitted character packet through a filter, and performs the passing of normal packet and the blocking of abnormal packet(320). The keyword access service server searches an IP address or a URL(Uniform Resource Locator) corresponding to the character string from the keyword database(330).

Description

Keyword Internet access method and system based on Domain Name Server (DNS) {The Method and System of Connecting Internet Using Keyword Based on DNS}

The present invention relates to a keyword internet access method and system based on a domain name server (DNS). In particular, an IP (Internet Protocol) for a string input by a web browser of a web client to the address bar is provided. If there is address information, it connects to the relevant web site, and if a reply is received that there is no IP address information, it adds a delimiter to the input string and inquires the domain name server (DNS) again by UDP method, and then the keyword for the delimiter. A method for transmitting an input character string by receiving an IP address of a connection service server to a keyword connection service server, and receiving a URL or IP address corresponding to the input character string so as to access the web site. Keyword by passing only the keyword packet needed to access the website for the request Keyword Internet based on Domain Name Server (DNS) which enables access service and blocks the additionally transmitted packets from other web clients and other applications so that the keyword access service server can perform smooth operations. It relates to a connection method and a system thereof.

In general, in order for the public to use the Internet, an ISP (Internet Service Provider) provider must be registered as a member and assigned an IP (Internet Protocol) address. The ISP is registered as a member using a Dynamic Host Configuration Protocol (DHCP) server. It dynamically assigns IP addresses to subscribers' PCs or laptops (hereinafter referred to as subscriber PCs).

This DHCP server dynamically assigns IP (Internet Protocol) addresses and configuration parameters to subscriber PCs operating in a dedicated network.It provides convenient management and assignment of IP addresses. A protocol that allows central management and assignment of IP addresses on a network.

In the TCP / IP protocol of the Internet, each computer user must be assigned an IP address when connecting to the Internet because each computer (PC, notebook, etc.) must have a unique IP address to access the Internet. do.

The DHCP server allows network administrators to centrally manage and assign IP addresses and automatically send new IP addresses when subscriber PCs are connected to other locations on the network.

The DHCP server is interworking with a Domain Name Server (DNS), and when the subscriber PC inputs an Internet address (domain name, URL, etc.) of a web site to be accessed, the DNS stores an IP address corresponding to the Internet address. It converts the Internet address into an IP address and sends it to the subscriber PC so that the subscriber PC can access the desired web site.

An IP address is used to identify a sender and a transmission line when communicating with TCP / IP on the Internet. Generally, an IP address is expressed as four decimal numbers, such as '147.46.80.205', separated by periods every 8 bits (1 byte). have. The global IP address is allotted and managed by Inter NIC in the United States, and the Korean network information center (KRNIC), a Korean Internet organization, is assigned among domestic users.

In addition, a domain name server (DNS) refers to a system that converts a domain name into an IP address in order to enable a domain name only without accessing the IP address by numbers to access a specific host belonging to a specific network. In other words, the IP address is a four-byte (or six-byte) sized numeric address separated by periods, such as '147.46.80.205', whereas the domain name is a domain, such as 'sis.snu.ac.kr'. It is composed of letters that represent institutional zones, region (country) zone names, and so on, making it easier to understand or remember names rather than numbers. Internet users can access the website by typing the domain name of the website in the address bar of the web browser. It becomes possible.

However, such a domain name also has a long English string URL format, so that an Internet user must input a long English string that is the domain name of the web site in the address bar of a web browser in order to access a desired web site. And the domain name was not easy to remember.

In order to solve such a problem, there is an invention of Korean Patent Registration No. 317059 (National Language Representation System of Internet Address), which is registered in advance. Register the local language notation (Hangul, etc.) to easily remember the Internet address, and enter this national language notation (Hangul, etc.) into the address bar of the web browser. It determines whether it is a national language notation (keyword) and if the input string is a URL, transmits it to the domain name server (DNS) to access the corresponding web site.If the input string is a national language notation (keyword), the corresponding URL or Connect to the national language service server where the IP address is registered, and return the URL or IP address. Relates to the services that make up the site, just an Internet user to enter the national language title (keyword) into the address bar of the web browser, it will also be able to access the website.

However, the above-described invention of the above-described invention has the ease of use and accessibility rather than inputting a URL, which is a domain name, into an address bar of a web browser in order to access a desired web site to an Internet user, but a company providing a web browser. (E.g., Explorer: Microsoft Corporation) can not capture the string entered in the address bar of the web browser arbitrarily or unilaterally recognize the string entered as a search word of the web browser to access the Internet to the search box If there is a problem of moving, and a competitor has a function of intercepting an illegally inputted string at the web client stage or having the web browser determine whether the string corresponds to the rules of domain name with respect to the inputted string, There was a problem that made it impossible .

In addition, the prior application is an English character string or / and '.' Etc., it is treated as a URL and transmitted to the domain name server (DNS). Therefore, the Hangul domains (Hangul.kr, Hangul.net, Hangul.org, etc.) and multinational domains that are being used in recent years : Japanese.jp, etc.) could not be applied.

In order to solve the above problems, the present applicant does not determine whether a web browser of an Internet user is a URL or a keyword with respect to a character string input in the address bar, by using a unique function of the domain name server (DNS) for the character string. When the domain name server (DNS) is queried by UDP and a reply is returned from the domain name server (DNS) that there is no IP (Internet Protocol) address information for the input string, a separator is added to the input string. Querying the domain name server (DNS) again in a UDP manner, returning the IP address of the keyword access service server for the delimiter, and transmitting the input string to the keyword access service server to transmit a URL or IP corresponding to the input string. By returning the address, the web browser connects to the web site. Even if it is impossible to capture randomly the character string entered in the address bar, it is possible to use keyword internet access service and based on the domain name server (DNS) which does not allow competitors to intercept illegally inputted character strings at the web client. A keyword internet connection method and a system have been applied for a patent as a technical subject matter.

In the above-described invention, when used in an intranet environment, the intranet environment can be used simultaneously in other applications besides the keyword service, so that other applications besides the normal string packet generated by the user in the address bar of the web browser for the Internet keyword service to the keyword access service server A packet (noise packet) generated due to interference with a program is also transmitted, causing the keyword access service server to become overloaded, and even the internet keyword service is interrupted.

The present invention has been made to solve the above problems, and in a method and system in which an Internet user accesses a web site by inputting a keyword in an address bar of a web browser, the web client inputs a keyword in an address bar. While making the web site accessible smoothly, it reduces the traffic burden of the keyword access service server caused by the noise packet coming from the unexpected application program of the web client, which can occur during the connection process. An object of the present invention is to provide a keyword internet access method and system based on a domain name server (DNS) that can provide a keyword access service.

In order to achieve the above object, the keyword Internet access method based on the domain name server (DNS) according to the present invention, the keyword Internet access method based on the domain name server (DNS), the Internet user is A first step of inputting a string into a web browser, a second step of the web browser querying a domain name server (DNS) for the input string, and the domain name server (DNS) corresponding to the string; A third step of returning a signal that there is no corresponding IP address to the web browser when there is no IP address, and when the web browser receives a signal that the corresponding IP address is not received from the domain name server (DN), In addition, the second step of querying the domain name server (DNS) again, the domain name server (DNS) A third step of returning the IP address of the keyword access service server by analyzing the delimiter; and transmitting the packet to the IP address of the keyword access service server returned from the domain name server (DNS). In step 4, the keyword access service server analyzes the transmitted packet and determines whether the packet is a packet required for keyword access, and passes only if the packet is a packet required for keyword access, and the packet is required for keyword access. A fifth step of blocking if not a packet, and the keyword access service server extracts a string for keyword access with respect to the passed packet in the fifth step and transmits an IP address or URL corresponding to the string to the web browser. The web browser corresponds to the received IP address or URL. It characterized by comprising a sixth step of connecting to the web site.

In addition, the present invention, when the fifth step determines whether the transmitted packet is a packet required for keyword access, request line, headers, content item in the structure of the packet Characterized by analyzing the.

The present invention also provides a method for determining whether the transmitted packet is a packet required for keyword access from the packet, and the method is not 'GET' in the request line item in the structure of the packet. Or a packet ending with an extension in which the HTTP version is not 1.0 or 1.1, or a URI is defined, and a specific value in which User-Agent information and Host information are defined in the Headers item. Packets that have no match, empty or accept information, and have a 'GET' or 'HEAD Request Method' with content in the Content item or a Content-Length If the packet is a post request method (POST Request Method) that does not, it is determined that the transmitted packet is not a packet required for keyword access, characterized in that blocking.

In addition, the present invention provides a method for determining whether the transmitted packet is a packet required for keyword access or the URI in the request line (Request line) has more information in addition to the "/" or a query string (QUERY STRING) A packet and a header containing a non-alphabetic character, a number, or a 2-byte character other than “-” in the host information or a normal top-level domain such as com, net, org, kr, etc. in the host information. In the case of a packet ending with, it is determined that the packet is not a packet required for keyword access and is blocked.

In addition, a keyword internet access system based on a domain name server (DNS) according to the present invention includes a domain name server (DNS) including a web browser, a domain name server connected through the web browser and an internet network, and a keyword access service server. In the keyword Internet access system based on the above method, the web browser queries the domain name server (DNS) for a character string input by an Internet user, and searches for the character string from the domain name server (DNS). When a signal is returned that there is no corresponding IP address, the delimiter is added to the string to query the domain name server (DNS) again, and the IP address of the keyword access service server is returned from the domain name server (DNS). The inputted statement as an IP address of the keyword access service server. Transmits a packet to a column, and receives an IP address or URL corresponding to the input string from the keyword access service server to access a corresponding web site, and the keyword access service server transmits a packet transmitted from the web browser. Analyze and determine whether the packet is required for keyword access or not, pass it only if the packet is necessary for keyword access, block if the packet is not necessary for keyword access, and Extracting a character string for access and transmitting the IP address or URL corresponding to the extracted character string to the web browser.

In addition, the present invention, when the keyword access service server determines whether or not the transmitted packet is a packet required for keyword access, request line, headers, content in the structure of the packet. Characterized by analyzing the items.

In addition, the present invention, the keyword access service server to determine each ISP (Internaet Service Provider) from the IP information of the passed packet, and connected to the keyword access server for each ISP corresponding to the determined ISP to process the steps It characterized in that it further comprises.

In addition, the present invention, the keyword access service server to determine each ISP (Internaet Service Provider) from the IP information of the passed packet, and to process each of the discriminated ISP, but one keyword access server to process Characterized in that.

The keyword internet access method and system based on the domain name server (DNS) according to the present invention can provide an Internet keyword service even if a company providing a web browser cannot arbitrarily capture a character string entered in an address bar of a web browser. Prevents competitors from intercepting illegally entered character strings at the web client side, enabling the web client to access the web site for keywords entered in the address bar, It is possible to provide a smooth keyword access service by reducing the traffic burden of the keyword access service server caused by a noise packet flowing from an application program of a web client that is unexpectedly generated.

In addition, the present invention can reduce the traffic load of the keyword access service server in the Internet keyword access service process, the capacity of the keyword access service server can be appropriate, thereby reducing the installation cost and operating cost of the keyword access service server. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic diagram of an entire system according to the present invention, FIG. 2 is a schematic diagram of the entire system according to the present invention divided by ISP, and FIG. 3 is a flowchart illustrating a keyword internet access method according to the present invention. 4 is a flowchart illustrating an embodiment of a blocking and passing process by packet analysis according to the present invention.

As shown in FIG. 1, the entire system of the present invention includes a number of web browsers 200 mounted on a PC of an Internet user, a domain name server (DNS) 400 connected to them through the Internet network 300, and the above. It consists of a keyword access service server 500 to return the URL or IP address of the web site corresponding to the keyword entered in the web browser.

The keyword access service server 500 analyzes the packet of the transmitted character string and determines whether the packet is a packet required for keyword access, and passes only if the packet is a packet required for keyword access, and the packet is required for keyword access. A filter 510 which performs a function of blocking a packet if it is not a packet, and a keyword database 530 that stores URLs or IP addresses corresponding to the keyword by extracting a string required for keyword access included in the passed packet. At least one keyword access server 520 for each ISP that retrieves a URL or an IP address corresponding to the keyword and transmits the extracted URL or IP address to the web browser.

The filter 510 determines each ISP (Internet Service Provider) from the IP information of the passed packet, and provides the passed packet to the keyword access server 520 of the corresponding ISP corresponding to the determined ISP. It may also include a function to process the separation by each ISP.

FIG. 2 is a schematic diagram showing a web browser divided by ISP for the entire system according to the present invention. In FIG. 1, the web browser 200 is comprehensively shown regardless of the ISP. In FIG. 2, a web browser 200 of an Internet user joins an ISP provider to access the Internet, and a DHCP (Dynamic Host Configuration Protocol) server (211, 221) of each ISP is connected through an ISP provider's network (210, 220). It shows the structure of accessing the Internet dynamically assigned IP address from.

For example, in FIG. 2, if ISP1 is referred to as 'KT' and ISP2 is referred to as 'one communication', the web browser 200 connected to ISP1's network 210 subscribes to 'KT', ISP1 for Internet access. The web browser 200 is dynamically assigned an IP address from the DHCP server 211 of 'KT', ISP1, and is connected to the Internet, and the web browser 200 connected to the network 220 of ISP2 is The web browser 200 is a member subscribed to ISP2 'Hanaro Communications' for Internet access, and the web browser 200 is dynamically allocated an IP address from the DHCP server 221 of ISP2 'Hanaro Communications' to access the Internet.

  On the other hand, the keyword access service server 500 determines each ISP (Internet Service Provider) from the IP information of the packet of the passed string from the filter 510, and for each string packet provided to distinguish and process each ISP The keyword access server 520 corresponding to the ISP process. In this case, the keyword database 530 storing URLs or IP addresses corresponding to the keyword may be provided with a dedicated keyword database 530 for each ISP or as a keyword database 530 for common use. have.

On the other hand, the keyword access service server 500 may determine each ISP (Internet Service Provider) from the IP information of the packet of the passed string, but may be processed by one keyword access server 520.

As described above, whether the keyword access service server 500 includes a plurality of keyword access servers 520 for each ISP or a single keyword access server 520 processes the keyword access server 520. If the number of web browsers (members) is large (for example, ISP is 'KT' or 'communication with one'), a separate dedicated keyword access server 520 may be provided to process a specific ISP. In addition, specific keyword ISPs having a small number of web browsers (members) connected to a specific ISP are bundled into one keyword access server 520 for processing. By doing so, the number of web browsers connected to each ISP can be reduced and the cost of installation and maintenance can be reduced.

FIG. 3 illustrates a process of a keyword internet access method based on a domain name server (DNS) according to the present invention in such a system.

Referring to FIG. 3, a keyword internet access method based on a domain name server (DNS) according to the present invention is as follows.

The Internet user inputs a string corresponding to the address of the web site he wants to access to the web browser 200 mounted on his PC (step 210).

Here, the string is all strings including a URL which is a domain name, or a Korean word / English word / Hangul.kr / Hangul.Hangul.

In addition, the place where the character string is input may be an internet address input window (hereinafter referred to as an 'address bar') of the web browser 200 or is formed at an arbitrary position of the web browser 200 or the bottom of the address window to input the character string. It can also be an input window that allows you to.

Next, the web browser 200 determines whether the string corresponding to the domain name rule is applied to the character string input to the address bar or the like (step 220).

Herein, the web browser determines whether or not the character string corresponding to the domain name rule is applied to the character string entered in the address bar and the like. For example, a string having a URL format is determined to correspond to a domain name rule. For example, if a string has a URL format such as www.naver.com, www.naverrr.com, or Hangul.kr, the string corresponds to the domain name rule regardless of whether an IP address corresponding to it exists or not. To judge.

Next, if the input string corresponds to the domain name rule, the string is queried to the domain name server (DNS) 400 through the Internet network 300 (step 230).

In this case, if the input string is not an English string, the encoding is performed. However, the encoding can be encoded by a known Punycode. For example, 'Hangul.kr' is converted into 'xn--bj0bj06e.kr' To encode

Next, the domain name server 400 determines whether there is an IP address corresponding to the string queried by the web browser (step 240). The IP address is returned to the web browser (step 250), and if there is no corresponding IP address for the string, a signal (information) indicating that the IP address does not exist is returned to the web browser 200 (step 260). When the web browser 200 receives the IP address from the domain name server 400, the web browser 200 accesses the web site based on the IP address (step 320).

Here, the domain name server (DNS) 400 is searched by a resolving method of a general domain name server (DNS) 400 to find an IP address for a query coming from a web browser. Are not supported by specific patches or subprograms.

On the other hand, when the web browser receives a signal (information) from the domain name server (DNS, 400) that there is no corresponding IP address (step 260) and the input string in step 220 corresponds to a domain name rule. If it is not a string, the separator is further added to the string (step 270), and the separator is further added to the string to the domain name server DNS 400 (step 280). In this case, the query to the domain name server (DNS, 400) is to complete the input string and the specified separator according to the format, and then execute the general query query of the UDP method.

The delimiter is a string that can be processed by a zone file, which is a standard function of the domain name server 400, and is, for example, '. String', where the string is local / keyword or the like. It can contain any string except the string expressed in URL format. If you check the language used by Internet users and specify it as 'input. Delimiter. Language' (ex: daum.local.kor) This can be done by checking the IP address, not by determining the IP address to determine the address to which the packet will go, but by multilingual processing.

Next, the domain name server (DNS) 400 analyzes a separator added to the input string through a zone file in the domain name server (DNS) 400 (step 290) and corresponds to the separator. The IP address of the keyword access service server 500 is searched and returned to the web browser 200 (step 300). At this time, the domain name server (DNS) 400 is formed by the UDP function.

Next, the web browser 200 transmits the packet to the IP address of the keyword access service server 500 returned from the domain name server DNS 400 (step 310).

The keyword access service server 500 analyzes the string packet transmitted from the web browser 200 through the filter 510, blocks the abnormal packet, and passes the normal packet (step 320).

For the packet passed from the filter 510, the keyword access server 520 extracts a string for keyword access from the passed packet, and an IP address corresponding to the string from the keyword database 530 for the extracted string. Alternatively, the URL is searched (step 330) to find an IP address or URL corresponding to the string, and then the IP address or URL is returned to the web browser 200 (step 330). In this case, the TCP connection is used.

Next, the web browser 200 that has received the IP address or URL accesses a web site corresponding to the IP address or URL.

As described above, the abnormal packet introduced (transmitted) into the keyword access service server 500 is a packet generated due to interference with other application programs in addition to the packet for the normal keyword service generated by the user in the address bar of the web browser 200. In particular, it is due to intranet environment using DHCP server of ISP. Such intranet environment can be used simultaneously in other applications besides keyword service. Especially, in a program designed to use the same TCP port 80 packet used by web server An abnormal packet may be generated and transmitted to the keyword access service server 500.

The abnormal packet is a packet using the HTTP protocol, which is the same as a packet for keyword access generated by a user in the address bar of the web browser 200, and may be generated by an application program or a destination that does not receive a DNS server response. Lost packets may be transmitted to the keyword access service server 500 by the intranet environment using the DHCP server of the ISP.

When the abnormal packets are mixed with the packets for keyword access and transmitted to the keyword service server 500, the abnormal packets cannot be processed with a general IP-based firewall to filter only packets for keyword access. The structure of the packet transmitted by the HTTP protocol is analyzed and processed.

Meanwhile, in order to filter only packets for keyword access, the present invention analyzes the packet transmitted through the filter 510, blocks abnormal packets, and passes normal packets. When described in detail as follows.

The HTTP protocol is an application layer protocol that supports communication between a web browser and a web server. Most of them use a 1.0 or 1.1 version, and TCP port 80 is used, but any other port can be defined and used. When the web client) sends a request to the server, the server gives a response to the web client. In the present invention, a request transmitted from the web browser 200 to the keyword access service server 500 and Response packets also follow the HTTP protocol.

The structure of the request packet transmitted from the web browser 200 to the keyword access service server 500 may include request lines, headers, and content items as shown below. Consists of.

Request Line Headers . . . Blank line Content…

The request line item is “Method, URI, HTTP-Version \ r \ n”, and the 'Method' is' GET, HEAD, POST, PUT, TRACE, OPTIONS, DELETE ', etc., and' GET, HEAD, POST 'is always used on all web servers.

The Uniform Resource Identifiers (URIs) are defined as a combination of Uniform Resource Locators (URLs) and Uniform Resource Names (URNs), and can refer to various elements such as names, locations, services, protocol elements, etc. for a single object. Recognition factor.

In addition, the "HTTP-Version" represents the format of the message used by the sender when sending a request, which is an important factor indicating what type of message the server or browser can understand and process.

Next, the header item includes information that informs the server of the type of web client, the type of content to be allowed, and who created the request.

Next, the Content item contains information in the Request line and Headers item, and then the Web client can send additional information to the Web server. If the request type is POST, the data It is included and delivered to a web server, and is typically used to send a variety of additional information to the site, such as logging in to a member, signing up for a membership, or searching with different options. At this time, in case of GET method, Content part is not needed and it is delivered in empty state.

The following is a packet structure of a general POST method, and is an example used to transmit additional information such as ID, password, name, and email.

================================================== =======

POST /member/register.php HTTP / 1.1

Accept: * / *

Accept-Language: en-us

Accept-Encoding: gzip, deflate

User-Agent: Mozilla / 4.0

Content-Length: 270

Host: www.whois.kr

Content-Type: application / x-www-form-urlencoded

(Blank Line)

id=test01&passwd=12345678&name=testuser&email=test@test.com

================================================== =======

Meanwhile, the keyword access service server 500 transmits a request line, headers, and content in the structure of the packet of the string through the filter 510 for the string packet transmitted from the web browser 200. (Content) The item is analyzed (step 321).

A method of analyzing each item in the structure of the packet and filtering the first step, wherein the method in the request line item is not 'GET', the HTTP version is not 1.0 and 1.1, or the URI The packet ends with the defined extension (step 322) and the User-Agent information and the Host information in the Headers item match or are empty or accept the specific value defined. A packet having no value in the information (step 323), and a post request method having a 'GET' or 'HEAD Request Method' having content in the content item or having no content length (Content-Length) In case of the packet (POST Request Method) (step 324), it is determined that the character string is not a normal packet necessary for keyword access (step 326). Turn on (step 325). The keyword access server 520 extracts a string in response to the passed string packet and searches the extracted string for an IP address or URL corresponding to the string from the keyword database 530 (step 330).

In addition, as a method of filtering the packet 510 in a second step to more reliably block an abnormal packet, the URI in the request line (Request line) item has more information other than "/" or a query string ( Packet having QUERY STRING) and a 2-byte character other than an alphabetic character, a number, or “-“ in host information in the header item, or com, net, org, kr, etc. in the host information. Likewise, a packet ending in the normal top-level domain can be regarded as an abnormal packet and blocked.

The first and second filtering methods may be integrated with each other to operate as one algorithm and method, or may be separated from each other and implemented as different algorithms and methods.

As described above, for the packets transmitted from the web browser to the keyword access service server 500, the keyword access service server 500 causes the filter 510 to analyze the packets so as not to be related to the keyword access service. By blocking them in advance by considering them as abnormal packets, the load of the keyword access service server 500 can be greatly reduced, and a high quality keyword access service can be provided to a web client.

Although the present invention describes that a web client enters a keyword in a web browser's address bar to access the web site, the keyword is entered in an arbitrary input window rather than a known address bar of the web browser using a specific program. Accessing a web site is also within the scope of the present invention.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I can understand that it can.

1 is a schematic diagram of an entire system according to the present invention.

2 is a schematic diagram of the entire system 2 according to the present invention.

3 is a flowchart illustrating a process of a keyword internet access method according to the present invention.

4 is a flowchart showing an embodiment of a blocking and passing process by packet analysis according to the present invention.

* Description of the symbols for the main parts of the drawings *

200: Web browser 210, 220: ISP's network

211, 221: DSCP server 300 of ISP: Internet network

400: domain name server 500: keyword access service server

510: filter 520: keyword access server

530: keyword database

Claims (10)

In the keyword Internet connection method based on the domain name server (DNS), A first step in which an internet user enters a string into the web browser, The web browser performs a second step of querying a domain name server (DNS) for the input string; The domain name server (DNS), when there is no corresponding IP address for the string, a third step of sending a signal to the web browser that the corresponding IP address is not present; A second step of, when the web browser receives a signal from the domain name server (DNS) indicating that there is no corresponding IP address, further adding a delimiter to the string to query the domain name server (DNS) again; The domain name server (DNS) is configured to analyze the delimiter and to return an IP address of a keyword access service server;  A fourth step of the web browser transmitting a packet for the character string to an IP address of a keyword access service server returned from the domain name server (DNS); The keyword access service server analyzes the transmitted packet and determines whether the packet is a packet required for keyword access, and passes only if the packet is a packet required for keyword access, and if the packet is not a packet required for keyword access. Blocking the fifth step, The keyword access service server extracts a character string for keyword access in the fifth packet and transmits an IP address or URL corresponding to the character string to the web browser, and the web browser transmits the received IP. A keyword internet access method based on a domain name server (DNS), comprising a sixth step of accessing a web site corresponding to an address or URL. The method of claim 1, The fifth step may be performed by analyzing a request line, headers, and content items in the structure of the packet when determining whether the transmitted packet is a packet required for keyword access. A keyword internet access method based on a domain name server (DNS), characterized in that. The method of claim 2, The method for determining from the packet whether the transmitted packet is a packet required for keyword access or not, the method is not 'GET' in the request line item in the structure of the packet or the HTTP version is 1.0. And packets ending in a non-1.1 or URI-extended extension, In the header item, a packet in which user-agent information and host information match or are empty or have no value in accept information, and the content ( Content) If the packet is a 'GET' or 'HEAD Request Method' having content in the item or a Post Request Method having no content length (Content-Length), the transmitted packet is a keyword access. A keyword internet access method based on a domain name server (DNS), characterized in that it is determined that the packet is not necessary and blocked. The method according to claim 2 or 3, The method for determining whether the transmitted packet is a packet required for keyword access includes: a packet in which the URI further includes information other than “/” or a query string in the request line item; When the header information contains a two-byte character other than alphabetic characters, numbers, or “-“ in the host information, or a packet ending with a normal top-level domain such as com, net, org, kr, etc. in the host information. A keyword internet access method based on a domain name server (DNS), characterized in that the packet is blocked because it is determined that the packet is not necessary for keyword access. The method of claim 1, The keyword access service server further comprises the step of determining each ISP (Internaet Service Provider) from the IP information of the passed packet, and connected to the keyword access server for each ISP corresponding to the determined ISP to process. A keyword internet access method based on a domain name server (DNS). The method of claim 1, The keyword access service server determines each ISP (Internaet Service Provider) from the IP information of the passed packet, and classifies and processes each ISP for each of the determined ISPs, wherein one keyword access server processes the domain name. Keyword Internet connection method based on server (DNS). In a keyword internet access system based on a domain name server (DNS) comprising a web browser, a domain name server and a keyword access service server connected through the web browser and the internet network, When the web browser queries the domain name server (DNS) for a character string input by an Internet user, and receives a signal from the domain name server (DNS) indicating that there is no corresponding IP address for the character string, In addition to the delimiter in the string, the domain name server (DNS) is queried again to receive the IP address of the keyword access server from the domain name server (DNS), and the input string is transmitted to the IP address of the keyword access server. Sends a packet to the server and performs a function of receiving an IP address or URL corresponding to the input string from the keyword access server and accessing the web site. The keyword access service server analyzes a packet transmitted from the web browser and determines whether the packet is a packet required for keyword access, and passes only if the packet is a packet required for keyword access, and the packet is required for keyword access. Block if it is not a packet, and extract a character string for keyword access with respect to the passed packet, and transmit an IP address or URL corresponding to the extracted character string to the web browser. Keyword Internet access system based on (DNS). The method of claim 7, wherein When the keyword access service server determines whether the transmitted packet is a packet required for keyword access or not, it analyzes and determines a request line, headers, and content items in the packet structure. A keyword internet access system based on a domain name server (DNS). The method according to claim 7 or 8, The keyword access service server is further characterized by determining each ISP (Internaet Service Provider) from the IP information of the passed packet and connected to the keyword access server for each ISP corresponding to the determined ISP to process. A keyword internet access system based on a domain name server (DNS). The method according to claim 7 or 8, The keyword access service server determines each ISP (Internaet Service Provider) from the IP information of the passed packet, and classifies and processes each ISP for each of the determined ISPs, wherein one keyword access server processes the domain name. Keyword Internet access system based on server (DNS).
KR1020080013329A 2008-02-14 2008-02-14 The method and system of connecting internet using keyword based on dns KR20090088031A (en)

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