JP2003152766A - Method, system and program for opening web server to public - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method, system and program for easily opening contents of a web server to public, where the IP address is dynamically subjected to change. SOLUTION: When a user system 2 accesses an ISP (Internet Service Provider) 4 to acquire an IP address, an agent 11 informs a registration server 7 about the IP address. The registration server 7 records the IP address and a final update time of each user to a database 8. When a web browser 12 of a client system 3 issues a request, a gating server 5 receives the request, searches the database and converts its URL into an IP address effective at present. The gating server 5 uses the converted URL to issue the request via a proxy server 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web server publishing method, a publishing system and a program. In particular, the present invention relates to a technique effectively applied to a method in which a user can publish a web server safely and easily on his or her own computer that does not have a fixed IP address.

[0002]

2. Description of the Related Art When a general user wants to publish a web server (web page) on the Internet, a system that obtains a global IP address from a business operator who provides a hosting service and is always connected to the Internet. Alternatively, a web server to be published on the system of the hosting service provider is introduced.
However, the number of global IP addresses is finite, and high usage fees are generally required for their use.

Therefore, more generally, a predetermined area (generally a capacity of several MB to several tens of MB) is secured in a hard disk of a business operator such as an ISP (Internet service provider), and a web page is uploaded to this hard disk area. The method of publishing the contents is used. In this case, the IP address is given to the system of the business operator, and the domain name is also the domain name of the business operator. Therefore, users are not given their own domain name,
The URL of the user page (uniform resource locat) with the domain name of the business operator and the directory name corresponding to the user name.
or) is specified.

On the other hand, with the recent improvement of the Internet connection environment, a regular user can always use the constant connection at low cost. That is, ADSL (asymmetr
By using high-speed data communication technology using telephone subscriber lines such as ic digital subscriber line), constant connection to the Internet is being realized at low cost.

Under such circumstances, if a user who publishes a web page using the web function of ISP obtains a constant connection environment, there is a demand to publish the web server on his or her own computer system. Will do. The web functions provided by ISPs and the like are generally limited in capacity, and the default CGI (common gateway int)
erface) can only be used, and the use of unique CGI is restricted. In addition, the security function may be limited. If you publish the web server on your computer system, you can configure the server freely without any restrictions.

[0006]

However, connection of many general users to ISPs, etc. is performed by DHCP (dynamic host).
configuration protocol) and fixed I
It has no P address. Therefore, DNS (domain name sy
stem) cannot be used for name resolution (translation to IP address). Dy is a DNS that can support the DHCP environment.
Although there is namicDNS, it cannot resolve names across domains.

For the problem of not having a fixed address, IP
With the spread of v6, it is possible that a fixed IP address for each user becomes widespread and a solution is achieved. However, disclosing the IP address has many problems in terms of security and privacy. Therefore, it is desirable to provide means for hiding the IP address.

In addition, the user can change the ISP,
It may be difficult for a user to publish a web server for 24 hours. A means that can provide a web publishing service that can handle such a case is desired.

An object of the present invention is to provide means for easily publishing a web server whose IP address is dynamically changed. Another object of the present invention is to provide a means for improving the IP address shielding property and securely publishing a web server. Another object of the present invention is to enable consistent provision of web services even for a user's web server that cannot always be published.

[0010]

The outline of the present invention is as follows. That is, a method of publishing a web server according to the present invention is a method of publishing a web server in which an IP address is dynamically changed, and a step of receiving a notification of an IP address from a user system including the web server and using the user system I
From the step of recording the P address in the database, the step of receiving the first request issued by the client system, and the first URL included in the first request,
The step of identifying the user, the step of reading the user's IP address from the database, and the first URL
Converting to a second URL containing an IP address,
If the step of issuing a second request including the second URL, the step of receiving a first response in response to the second request, and the status of the first response include a code or message indicating that processing has been normally performed,
Returning the first response to the client system as a second response in response to the first request. According to such a web server publishing method, the notification of the IP address is received from the user system, and the first request from the client is transferred using this IP address. Therefore, even if the IP address is dynamically changed, the request can be consistently forwarded to the same user.

In the step of converting the first URL into the second URL, the domain name of the first URL and the specific portion of the user can be converted into an IP address and a directory name recorded in advance in association with the user. By registering an arbitrary directory of the user system in advance, this directory can be used as a root directory for requests from the Internet.

When the IP address notified from the user system is recorded, the step of recording the time when the notification is made or the time when the IP address is recorded as the last update time in the database in association with the user, and the IP address from the database When reading, the method further includes the step of reading the last update time from the database, and if the current time is not within a predetermined elapsed time from the last update time, reroute to the error link recorded in association with the user. It may further include any one of a step of causing the error page to be returned to the client system as a second response and an error page for each user registered in advance. By recording the last update time, if there is no update of the IP address within a certain period of time, it is considered that the user system has been disconnected and error processing can be performed.

The status of the first response indicates "Not Foun
d) In the case of including a code or message indicating that the processing was not normally performed, a step of rerouting to an error link recorded in association with the user, or an error page for each user registered in advance as the second response It may further have any of the steps of returning to the client system.
Error processing can be performed even if the request to the user system is not processed normally.

The notification of the IP address can be periodically received from the agent program installed in the user system. By using the agent program, the task of notifying the IP address from the user system can be left to the agent.
The server load on the service side can be reduced.

Second request and first in response
The response can be communicated via a proxy server that has a page cache function. Since the page cache can be used, even if the capacity of the communication line to the user system is small, the processing will be completed on the communication line of the hosting system side for requests for cached pages, so the response should be hastened. You can

Further, the method of publishing a web page according to the present invention uses a dynamic IP from an internet service provider.
The step of acquiring the address, the step of notifying the acquired IP address to the hosting system that provides the public service of the web server whose IP address is dynamically changed, and the notified IP from the hosting system
Receiving a request that includes an address and returning a response in response to the request. That is, when the IP address is dynamically changed,
Since this is notified to the hosting system, the request received by the hosting system is converted into an appropriate URL and transferred. Therefore, even if the IP address is changed, the web server is published in the same manner as a normal web service. On the other hand, in the present invention, since the web server is built in the user's own computer system, the function and capacity are not limited as in general web services.
That is, according to the present invention, it is possible to provide a service that is comparable to a general web service and that allows a user a free server configuration.

The present invention can be understood as a system or a program in addition to the above-described method invention. In the present invention, HTTP includes
HTTP, which is a protocol with a security function
S is also included.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention can be implemented in many different modes and should not be construed as being limited to the description of this embodiment. Note that the same elements are denoted by the same numbers throughout the embodiments.

In the following embodiments, a method or system will be mainly described, but as will be apparent to those skilled in the art, the present invention can be implemented as a computer-usable program. Therefore, the present invention can take an embodiment as hardware, an embodiment as software, or an embodiment as a combination of software and hardware. Program is hard disk, C
It can be recorded on any computer-readable medium such as a D-ROM, an optical storage device or a magnetic storage device.

In this embodiment, a general computer system can be used. A general computer system includes a central processing unit (CPU), a main storage device (main memory: RAM), a non-volatile storage device (ROM), a coprocessor, an image accelerator, a cache memory,
It has hardware resources such as an input / output control unit (I / O) that is generally provided in a computer system. Also,
An external storage device such as a hard disk device and a communication means connectable to the Internet are provided. Computer systems include personal computers, workstations,
Various computers such as a mainframe computer are included. Further, it goes without saying that each computer system can operate various operating systems that are currently widely used and other general-purpose application software.

In the following embodiments, the functions of servers and agents included in each system can be realized by computer software. The computer software can be realized by, for example, a component that combines object-oriented class programs.
The functions realized by the server and other programs may be realized by a single component or may be realized by combining a plurality of components. Further, among the respective functions, a plurality of functions may be realized by a single component.

FIG. 1 is a block diagram showing an example of a web server publishing system according to an embodiment of the present invention. The web server publishing system of this embodiment is mainly realized by the hosting system 1 and the user system 2
Some features of are included in the web publishing system. Also,
In order to use the web publishing system of this embodiment,
A client system 3 and an ISP (Internet Service Provider) 4 are required.

The hosting system 1 provides a web server publishing service whose IP address is dynamically changed. That is, upon receiving a request from a user who installs and manages the web server in the user system 2 which is his or her own computer system, the client system 3 can access the user system 2 via the hosting system 1 as described later. .

The hosting system 1 includes a gating server 5, a proxy server 6, a registration server 7, and a database 8. Gating server 5
Is a special server serving as an entrance to the hosting system 1. The gating server 5 receives the HTTP request issued by the web browser 12 of the client system 3, converts the URL as described in detail later, and transfers the request. The proxy server 6 is
It has a function similar to that of a normal proxy server, and particularly has a function of caching user pages. The registration server 7 uses the agent 11
It has a function of receiving the notification of the IP address from and registering the received IP address and other information in the database 8.

User information 9 for each user who publishes the web server is recorded in the database 8. Examples of data recorded in the user information 9 include a user ID, IP address, HTTP route, error link, and last update time. The user ID is an identification character or symbol that identifies the user. However, in the present embodiment, it is limited to a character string that can be converted into a URL (a character string that is allowed to be used for expressing a URL). The IP address is the current IP address assigned to the user system 2. Strictly speaking, it is not the current IP address, but the latest IP address notified from the agent 11 is recorded. The HTTP root is a top-level directory of web pages published by users. That is, the relative directory that provides the index page on the user's website. The HTTP root is different from the web server root directory. Error link is HT
It is a link destination for notifying the browser when the TP request is an error (when the request is not normally processed). The error link can be accessed by redirecting to the browser. Multiple error links can be prepared according to the type of error. The last update time is the time when the agent last reported the IP address. When the current time is not within the predetermined elapsed time from the last update time, the user system 2 is regarded as disconnected. That is, the processing is performed assuming that the currently recorded IP address is not valid.

The user system 2 is a computer system in which a web server (HTTP server 10) disclosed by the user is installed, and is managed by the user. Since the user system 2 is managed by the user himself, in most cases, the user himself can decide the management content. For example, a CGI that is an interface between a server and application software can be created independently, and the server and any application software can be linked.
Further, there is no limitation on the recording capacity of the web page managed by the server. Furthermore, it is possible to take security measures that the user deems necessary, almost without limitation.

HT as a web server published by the user
The TP server 10 is illustrated. The HTTP server 10 is H
It is a server that receives a request according to a TTP (hypertext transfer protocol) and responds to the request. The response result is returned to the request source as a response according to HTTP.

The user system 2 includes an agent 11. When the user system 2 connects to the ISP 4 by, for example, a dial-up connection and connects to the Internet, the agent 11 acquires the assigned IP address (that is, the currently valid IP address) from the DHCP server 13 and sends it to the registration server 7. To notify. The agent 11 is programmed to periodically notify the registration server 7 of the currently valid IP address. Therefore, if there is no notification from the agent 11 for a certain period of time, the user system 2 is in a disconnected state, and the hosting system 1 determines that the IP address is valid or invalid because the IP address is not updated within a predetermined elapsed time. You can judge.

The client system 3 is a general user (client) who wants to access a web server (HTTP server 10). Client system 3
Includes a web browser 12. Web browser 12
Is a general browser such as Internet Explorer (trademark of Microsoft Corporation) and Netscape Navigator (trademark of Netscape Corporation).

The ISP 4 is a service provider that provides connection services and other services for general users to connect to the Internet. User system 2 to IS
When a connection request is issued to P4, the ISP 4 issues an IP address by the DHCP server 13 after performing a predetermined authentication process and the like. This IP address is the currently valid IP address in the user system 2. As described above, the agent 11 notifies the hosting system 1 (registration server 7) of this IP address. It goes without saying that another IP address is given when the user connects to the ISP 4 on another occasion.

FIG. 2 is a flowchart showing an example of a web server publishing method according to an embodiment of the present invention. The left side shows the processing in the user system 2, the central portion shows the processing in the hosting system 1, and the right side shows the processing in the client system 3.

When the user connects to the ISP 4, the DHCP address is given to the user system 2 by the DHCP server 13 (step 20). This IP address is dynamic and will be a different IP address at the next connection.

When the IP address is given to the user system 2, the agent 11 acquires the IP address and notifies the registration server 7 of this (step 21). Upon receiving the notification from the agent 11, the registration server 7 records the IP address in the database 8 in association with the user, that is, together with the user ID (step 22). In addition, the time (last updated time) at that time is recorded.

The notification of the IP address by the agent 11 is periodically performed, and the registration server 7
Updates the database 8 each time it receives a notification from the agent 11. As a result, the registration server 7 receives the notification of the current IP address as long as the agent 11 can operate, and the database 8 (IP address) is guaranteed to be the latest. However, the notification cycle (elapsed time) of the agent 11
When the IP address is not updated in a longer time, the agent 11 should judge that it is not in the operating environment (the user system 2 is down or the user system 2 is disconnected from the Internet). The last update time is used for this determination.

The processing of steps 20 to 22 is carried out independently and in parallel with the processing of step 23 and subsequent steps which will be described below. That is, the processing of steps 20 to 22 is processing of recording the latest IP address for each user in the database 8 and recording the last update time in order to contribute to the determination of its validity.

HTTP server 10 of user system 2
The (web server) is published as follows. First, the web browser 12 of the client system 3 issues a request (step 23). The URL included in this request is expressed by describing the domain name of the gating server 5 and the symbol (user ID) that identifies the user as the directory name. For example, the domain name of the gating server 5 is "www.gating.net".
And the user ID is “user”, the URL issued by the web browser 12 is “http://www.gating.net/user/i”.
ndex.thml ”. Such a URL is unique to the user, and is the connection environment of the user system 2 and I
It does not change depending on the P address. Therefore, the web browser 12 of the client system 3 can register this URL as a favorite or a shortcut.

The request issued in step 23 is DN
As a result of name resolution in S, it is transmitted to the gating server 5. The gating server 5 receives the request and identifies the user from the URL (step 2).
4). For example, the URL "http://www.gating.net/
In “user / index.html”, the directory name “user” following the name part of the gating server 5 is the user ID.
Becomes

The gating server 5 searches the database 8 for the user name (user ID) and acquires the IP address of the user (step 25). Also, the last update time when the IP address is updated is acquired.

It is determined whether the current time is within a predetermined elapsed time from the last update time, that is, whether the IP address can be regarded as valid (step 26). Here, the predetermined elapsed time may be the cycle notified by the agent 11 (it is appropriate to set the maximum value of the cycle including the error range). If the determination in step 26 is true (that is, if the IP address can be regarded as valid), URL conversion is performed (step 27). The URL conversion can be performed by replacing the domain name of the original URL with the read IP address of the user and replacing the user specific portion (user ID) of the original URL with the HTTP route of the user. For example, the IP address that can be regarded as the current valid address of the read user is "123.45.67.89".
And the HTTP route of the user is “test”, the URL “http://www.gating.net/user/ind” in the above example is used.
ex.html "is" http://123.45.67.89/test/index.htm "
It is converted to "l". The gating server 5 issues a new request to this converted URL (step 28). Since the IP address “123.45.67.89” of the URL included in the new request should be a valid address that uniquely represents the user system 2 on the Internet at present, the request should reach the user system 2.

On the other hand, when the determination in step 26 is false (IP
If it is determined that the address is invalid), the gating server 5 performs error link processing or error page transmission (step 29). For example, as a response to the HTTP request issued in step 23, an error link (URL of the error page) is included in the location information, and a response set to redirect the status is returned to the client system 3. Alternatively, the previously recorded error page is returned to the client system 3 as a response to the HTTP request issued in step 23. By performing error processing in this way, the current user system 2
It is possible to announce that the is under maintenance and announce the next release date. The client system 3 receives the response including the error processing, and reroutes (redirects) the error page or displays the error page (step 30).

In this embodiment, the request issued in step 28 passes through the proxy server 6. The proxy server 6 receives the request, searches the cache 32, and if the relevant page exists, reads it from the cache and makes it the response (step 31).
By performing the caching in this way, even if the communication capacity to the user system 2 is small, the hosting system 1
Since the processing ends in the large-capacity communication environment of, the response speed can be increased. If there is no corresponding page in the cache, the request is transferred to the HTTP server 10 of the user system 2 (step 31). The user system 2 performs a predetermined response process to the request and returns a response (step 33).

The proxy server 6 is the HTTP server 10
From the cache or the response from the cache is transferred (step 31), and the gating server 5 receives this. Then, the gating server 5 transfers this response to the client system 3 (step 34).

If the response from the HTTP server 10 does not include a message indicating that the response has been normally processed (status code in the 200s), it is considered that the request has some kind of error. In this case, the gating server 5 performs the same error link or error page processing (step 35) as the above-described error processing of step 29, and sets the processing result as a response (step 34).

The gating server 5 returns a predetermined file (content) or error processing content to the web browser 12 of the client system as a response to the request of step 23 (step 3).
4). The web browser 12 receives the response and displays it. Alternatively, error processing is performed (step 3)
6).

As described above, even if the HTTP server 10 operated by the user system 2 has a dynamic IP address, it can be consistently published on the Internet. That is, even if the IP address of the user system 2 is changed, the same URL representing the user's server (for example, "http://www.gating.net/user/ind").
ex.html ”) can be used.

Even when the HTTP server 10 of the user system 2 is not operating, another page (error page) can be displayed. This gives the user 24
You don't need to run the time server, you can publish the server for any period of time.

Further, according to this embodiment, the IP address of the user system 2 can be hidden. The client is
Only the domain name and user name of the gating server 5 can be known, and the IP address of the user system 2 is not directly known. Therefore, it is possible to make it difficult to attack a specific user server. In other words, it becomes possible to protect the server from external attacks and securely publish it.

Further, according to the present embodiment, there is no limitation on the recording capacity of pages, usable CGI, and the like. It is also possible to take unique security measures.

Further, in the present embodiment, the proxy server 6
Since the page cache can be used by, the web server can be published even if the user's Internet connection line is a low speed line.

Further, in the present embodiment, since the HTTP server 10 is constructed by the user system 2, there is no need for uploading, which was conventionally required when updating the content.

Further, in the present embodiment, the user does not need to acquire the domain name and manage the domain name. Moreover, the URL that identifies the user's server is unique to the user, and browser functions such as bookmarks (favorites) can be used.

It is optional for the user to add a security function such as password authentication to the access to the HTTP server 10. Therefore, the contents can be kept secret from the provider, and it becomes easy to keep the information secret, which was difficult in the case of the conventional method of uploading to the provider's hard disk.

Although the invention made by the present inventor has been specifically described based on the embodiments of the present invention, the present invention is not limited to the above embodiments and various modifications can be made without departing from the scope of the invention. It is possible to change.

For example, in the above-mentioned embodiment, an example in which the proxy server 6 is used has been described. However, the proxy server 6 is not an essential requirement.

The method of including the user name (user ID) in the URL to be disclosed is an example, and other identifiers associated with the user can be used.

In the above embodiment, an example of displaying an error page by error processing is shown, but error processing may be omitted. In this case, a response including a status code (status line) indicating an error is returned to the client.

In the above embodiment, HTTP is illustrated as the request or response scheme, but the scheme is not limited to this. ftp (file transfer protoc
ol) The present invention can be similarly applied to other schemes.

[0058]

The effects obtained by the typical ones of the inventions disclosed in the present application are as follows. That is, a web server whose IP address is dynamically changed can be easily published. In addition, the shielding property of the IP address can be enhanced, and the web server can be disclosed safely. Further, it is possible to provide a consistent web service even for a user's web server that cannot always be published.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a web server publishing system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an example of a web server publishing method according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Hosting system, 2 ... User system, 3 ...
Client system, 4 ... ISP (Internet service provider), 5 ... Gating server, 6 ... Proxy server, 7 ... Registration server, 8 ... Database, 9 ... User information, 10 ... HTTP server,
11 ... Agent, 12 ... Web browser, 13 ... D
HCP server.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kentaro Ichima             1623 1423 Shimotsuruma, Yamato-shi, Kanagawa Japan             BM Co., Ltd. Daiwa Office F term (reference) 5B089 GA07 GA19 GB01 HA10 KA13                       KB03 KB06 KB07 KH03                 5K030 GA16 HA08 HC01 JT03 KA01                       KA05 KA07 KA13

Claims (16)

[Claims] 1. A method of publishing a web server in which an IP address is dynamically changed, the method comprising: receiving a notification of an IP address from a user system including the web server, and associating with a user who uses the user system. Recording the IP address in a database; receiving a first request issued by a client system; identifying the user from a first URL included in the first request; Reading from a database, the first URL is a second URL including the IP address
A step of issuing a second request including the second URL, a step of receiving a first response in response to the second request, and a code indicating that the status of the first response has been normally processed. Alternatively, when the message is included, the first response is returned to the client system as a second response in response to the first request. 2. In the step of converting the first URL into the second URL, a domain name of the first URL and a specific portion of the user are converted into a directory name recorded in association with the IP address and the user in advance. The method of claim 1. 3. When recording the IP address notified from the user system, the time when the notification is made or the time when the IP address is recorded is recorded in the database as a last update time in association with the user. Further comprising: reading the last update time from the database when reading the IP address from the database, wherein the current time is not within a predetermined elapsed time from the last update time. , A step of rerouting to an error link recorded in association with the user, or a step of returning an error page for each user registered in advance as the second response to the client system. The method of claim 1. 4. When the status of the first response includes a code or message indicating that the processing has not been normally processed, a step of rerouting to an error link recorded in association with the user, or pre-registering The method according to claim 1, further comprising the step of returning an error page for each user as the second response to the client system. 5. The method according to claim 1, wherein the notification of the IP address is periodically received from an agent program installed in the user system. 6. The method according to claim 1, wherein the second request and the first response in response thereto are communicated via a proxy server having a page cache function. 7. A step of obtaining a dynamic IP address from an Internet service provider, and a step of notifying the obtained IP address to a hosting system that provides a public service of a web server whose IP address is dynamically changed. And a step of receiving a request including the notified IP address from the hosting system, and returning a response in response to the request, and a method of publishing a web server in which an IP address is dynamically changed. 8. A system for publishing a web server whose IP address is dynamically changed, and means for receiving a notification of an IP address from a user system including the web server, and associating with a user who uses the user system. Means for recording the IP address in the database, means for receiving the first request issued by the client system, means for identifying the user from the first URL included in the first request, and the IP address of the user. A means for reading from the database; a second URL including the IP address and the first URL;
Means for converting to, a means for issuing a second request including the second URL, a means for receiving a first response in response to the second request, and a code indicating that the status of the first response has been normally processed. Or, when including a message, means for returning the first response to the client system as a second response in response to the first request. 9. The means for converting the first URL into the second URL, wherein the domain name of the first URL and a specific portion of the user are converted into a directory name recorded in advance in association with the IP address and the user. The system of claim 8. 10. When recording the IP address notified from the user system, the time when the notification is made or the time when the IP address is recorded is recorded in the database as the last update time in association with the user. And a means for reading the last update time from the database when reading the IP address from the database, wherein the current time is not within a predetermined elapsed time from the last update time. , A means for rerouting to an error link recorded in association with the user, or a means for returning an error page registered in advance for each user to the client system as the second response. The system of claim 8. 11. The status of the first response includes:
When the code or message indicating that the processing was not normally performed is included, a means for rerouting to an error link recorded in association with the user, or an error page registered in advance for each user as the second response 9. The system according to claim 8, further comprising any means for returning to the client system. 12. The system according to claim 8, wherein the notification of the IP address is periodically received from an agent program installed in the user system. 13. The system according to claim 8, wherein the second request and the first response in response thereto are communicated via a proxy server having a page cache function. 14. A means for dynamically obtaining an IP address from an Internet service provider, and a means for notifying the obtained IP address to a hosting system that provides a public service of a web server whose IP address is dynamically changed. And a means for receiving a request including the notified IP address from the hosting system, and a means for returning a response in response to the request, and a system for publishing a web server whose IP address is dynamically changed. 15. A program for causing a computer to execute a public service of a web server whose IP address is dynamically changed, the procedure of receiving a notification of an IP address from a user system including the web server, and the user system. A step of recording the IP address in a database in association with a user to be used, a step of receiving a first request issued by a client system, a step of identifying the user from a first URL included in the first request, A procedure for reading a user's IP address from the database; a second URL including the first URL and the first URL;
A procedure for converting to, a procedure for issuing a second request including the second URL, a procedure for receiving a first response in response to the second request, and a code indicating that the status of the first response has been normally processed. Alternatively, a program that causes a computer to execute a procedure of returning the first response to the client system as a second response in response to the first request when the message is included. 16. A procedure for dynamically obtaining an IP address from an Internet service provider, and a procedure for notifying the obtained IP address to a hosting system that provides a public service of a web server whose IP address is dynamically changed. A program for causing a computer to execute a procedure of receiving a request including the notified IP address from the hosting system, and a procedure of returning a response in response to the request.