JP2002281173A - TV door phone equipment - Google Patents

Abstract

(57) [Summary] [Problem] Even if a contract does not have a fixed IP address, an external terminal can connect to a TV intercom apparatus, and it is inexpensive and secure, and customers who are away from home and stay at home To provide a TV door phone device that allows the user to browse the information of the user. SOLUTION: A control unit 22 allows a visitor image picked up by a camera 11 of a camera-equipped entrance terminal 1 to be browsed on a homepage stored in a WWW server unit 26, and a transmission / reception unit 25 sends a call to a telephone line network 3. To the Internet service provider via the
An e-mail to a preset destination describing the P address is created by the e-mail creation unit 27 and transmitted via the transmission / reception unit 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television door phone device that allows a visiting person to browse information on a visitor to an entrance of an absence house.

[0002]

2. Description of the Related Art Conventionally, as this kind of TV door intercom device, a home page on which visitor information is posted is prepared on a TV intercom device connected to the Internet, and an external terminal is connected via the Internet. It has been considered to browse information of visitors and the like (Japanese Patent Laid-Open No. 2000-308044).

[0003]

However, in order to connect from an external terminal to the TV intercom apparatus via the Internet, the IP address of the TV intercom apparatus must be known, but the IP address is always fixed. Connection contracts were expensive to connect. Further, if the IP address is fixed, there is a risk of illegal connection by a method such as brute force to the IP address, and there is a security problem.

In the case of a contract where the IP address is not fixed,
There is a possibility that a different IP address may be assigned each time a connection is made to an ISP (Internet service provider) via a telephone line, and the IP address of the TV intercom apparatus cannot be specified. There was a problem that it was not possible.

[0005] The present invention has been made to solve such a problem, and even if the contract does not have a fixed IP address, an external terminal can be connected to the TV intercom apparatus, and security can be maintained at low cost. The present invention also provides a TV door phone device that allows the user to browse information on a visitor to an absence house from outside.

[0006]

According to the present invention, there is provided a television intercom apparatus comprising: an image pickup unit for picking up an image; an image capture unit for storing the image as an image file; A WWW server unit for displaying a home page on a browser of a terminal; a transmitting / receiving unit connected to an Internet service provider via a telephone network for transmitting / receiving data or transmitting / receiving an e-mail; and an e-mail creating unit for generating the e-mail And a control unit, wherein the control unit, when the visitor visits,
The image file captured by the imaging unit is displayed on the homepage, the transmission / reception unit is connected to the Internet service provider via the telephone line network, and the electronic mail creation unit is provided when the Internet service provider is connected. It has a configuration having a function of creating an e-mail to a preset destination in which an IP address is described, transmitting the e-mail by the transmitting / receiving unit, and notifying the IP address to the preset destination. ing. According to this configuration, the IP address for accessing the WWW server unit of the TV door phone device and browsing the homepage displaying the image file of the visitor is notified to the user (home person) on the go by e-mail. Become.

[0007] Further, the television door phone apparatus of the present invention includes an image pickup unit for picking up an image, an image capture unit for storing the image as an image file, and a browser of the external terminal in response to a request from an external terminal on the Internet. A control unit comprising: a WWW server unit for displaying a home page; a transmitting and receiving unit connected to an Internet service provider via a telephone line network for transmitting and receiving data; a file generating unit for generating an HTML file; When a visitor visits, an image file captured by the imaging unit is displayed on the homepage, the transmission / reception unit is connected to the Internet service provider via the telephone line network, and the Internet service is provided by the file creation unit. I given when connecting to the provider
It has a configuration having a function of creating an HTML file describing a P address, causing the transmission / reception unit to transfer the HTML file to the Internet service provider, and causing the Internet service provider to post a home page displaying the IP address. ing. With this configuration, a home page describing an IP address for accessing a WWW server unit of the television door phone apparatus and browsing a home page displaying an image file of a visitor is posted on the Internet service provider.

[0008] Also, the television door phone apparatus of the present invention includes an image pickup unit for picking up an image, an image capture unit for storing the image as an image file, and a browser of the external terminal in response to a request from an external terminal on the Internet. A WWW server unit for displaying a home page, a transmission / reception unit connected to an Internet service provider via a telephone line network for transmitting / receiving data, a file creation unit for creating a file, and a control unit. When a visitor visits, an image file captured by the imaging unit is displayed on the homepage, the transmission / reception unit is connected to the Internet service provider via the telephone line network, and the file creation unit is connected to the Internet service provider. File that describes the IP address assigned to the And a function of causing the transmission / reception unit to transfer the file to the Internet service provider, and notifying the IP address only when authentication is normal on an authentication page provided by the Internet service provider. Have. With this configuration, the IP address for accessing the WWW server unit of the TV door phone device and browsing the home page displaying the image file of the visitor is notified only when the authentication is normal.

[0009] The WWW server unit may include, among the environment variables transmitted by the browser when the external terminal requests to browse the home page, the address of the home page viewed immediately before and the address of the authentication page. It is conceivable to permit the browsing of the homepage displaying the image of the visitor only when the IDs match. With this configuration, only browsing requests that have passed through the authentication page are permitted to be browsed.

[0010] A method for publishing a visitor image of a television door phone apparatus according to the present invention includes the steps of creating an image file that captures the image of the visitor when the visitor visits, and creating a home page that displays the image file. Connecting to an Internet service provider via a telephone network, creating an e-mail to a preset destination describing an IP address assigned to the Internet service provider when connecting, and transmitting the e-mail to the Internet service provider. Transmitting and notifying the IP address to the preset destination. With this configuration, the IP address for browsing the home page displaying the visitor's image file is notified to the user (housekeeper) by e-mail.

Further, according to the present invention, there is provided a method of publishing a visitor image of a television intercom apparatus, wherein, when the visitor visits, a step of creating an image file which captures an image of the visitor, and creating a homepage for displaying the image file. Connecting to the Internet service provider via a telephone line network, creating an HTML file describing an IP address assigned to the Internet service provider when connecting, and transmitting the HTML file to the Internet service provider. Transferring the IP address to the Internet service provider and posting a home page displaying the IP address on the Internet service provider. With this configuration, a home page describing an IP address for browsing a home page displaying a visitor's image file is posted on the Internet service provider.

Further, according to the present invention, there is provided a method for publishing a visitor image of a television intercom apparatus, wherein the visitor visits a visitor to create a picture file of an image of the visitor, and creates a homepage for displaying the picture file. Connecting to an Internet service provider via a telephone line network; creating a file describing an IP address given to the Internet service provider when connecting; transferring the file to the Internet service provider And displaying the IP address only when authentication is normal on the authentication page provided by the Internet service provider. With this configuration, the IP address for accessing the WWW server unit of the TV door phone device and browsing the home page displaying the image file of the visitor is notified only when the authentication is normal.

[0013] Here, in the environment variables transmitted by the browser when the browsing request of the homepage displaying the visitor's image file is made, the address of the homepage browsed immediately before matches the address of the authentication page. It is conceivable to provide a step of permitting browsing. With this configuration, only browsing requests that have passed through the authentication page are permitted to be browsed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 are views showing a TV door phone apparatus according to a first embodiment of the present invention.

As shown in FIG. 1, the TV intercom apparatus of the present embodiment comprises a camera-equipped entrance device 1 and a TV intercom master device 2. The camera-equipped entrance device 1 has a camera (imaging unit) 11, Speaker 12, call button 13
The TV door phone master unit 2 includes a calling unit 21,
The control unit 22 includes a control unit 22, a video / audio capturing unit (image capturing unit) 23, a memory 24, a transmitting / receiving unit 25, a WWW server unit 26, and an e-mail creating unit 27.

The TV intercom master unit 2 includes a transmitting / receiving unit 2
5 to the Internet service provider (ISP) 4 via the telephone network 3
The email created in step 7 is sent to the mail server 4 of ISP4
2 can be transmitted. Also, a request for browsing a homepage from an external terminal 6 such as a personal computer connected to the Internet 5 is received by the WWW server unit 26 via the Internet 5 and the router 41 via the telephone network 3 connected to the ISP 4. The WWW server unit 26 transmits the stored HTML (Hyper Text Markup Language) file data to the requesting external terminal 6 and displays the home page on the WWW browser (WWW browsing software) 61 of the external terminal 6. You can do it.

In such a TV intercom apparatus,
When the visitor pushes the call button 13 of the camera-equipped entrance cordless handset while the user (housekeeper) is out, the image of the visitor captured by the camera 11 is posted on a homepage provided by the WWW server unit 26, and is used while going out. Visitors can browse this homepage and check the appearance of visitors.

More specifically, the operation mode of the TV door phone master unit 2 selected and set by the user is set to the absence transfer mode for transferring the information of an on-going visitor and the call of the camera-equipped entrance terminal 1. When the visitor presses the call button 13 of the camera-equipped entrance cordless handset, the control unit 22 of the TV door phone master unit 2 temporarily stores the visitor image captured by the video / audio capture unit 23 in the memory 24. I do. And
The data is converted into a format such as JPEG or GIF and stored under a predetermined file name in a predetermined location in the area of the WWW server unit 26 where the data for the homepage is stored. Images can be browsed by the provided homepage.

Next, as shown in FIG.
Is transmitted to the ISP 4 via the telephone network 3 by the transmitting / receiving unit 25.
(S11), and when connected to the ISP 4, an IP address is assigned from the ISP 4 (S12). Control unit 22
Creates an e-mail to a preset destination (for example, an e-mail address of a user (housekeeper)) describing the IP address by the e-mail creation unit 27, and sends the created e-mail via the transmission / reception unit 25. The mail is sent to the registered mail server via the mail server 42 of the ISP 4 (S13), and the user sends the electronic mail from the mail server using the mail viewing software 62 at the external terminal 6 such as a personal computer connected to the Internet. Receive the mail, specify the IP address written in the mail, and
The image of the visitor is browsed by the homepage stored in the TV door phone master unit 2 by the W browser 61 (S
14).

As described above, the TV intercom apparatus according to the present embodiment has the IS
Since the IP address assigned from P4 is transmitted to the user on the go by e-mail, the image of the visitor stored in the TV intercom base unit 2 can be browsed from outside via the Internet while maintaining security at low cost. be able to.

As another aspect of the present embodiment, the ISP4
The IP address assigned at the time of connection with the ISP 4 is stored in the memory 24, and it is determined whether the assigned IP address matches the stored IP address at the time of the previous connection at the next connection with the ISP 4. After the comparison, only when they do not match, an e-mail describing the IP address is transmitted to the user. With this configuration, it is possible to reduce the number of e-mail transmissions and reduce the load on the TV door phone master unit 2 and the Internet 5.

(Second Embodiment) FIGS. 3 and 4 are views showing a TV door phone apparatus according to a second embodiment of the present invention. In addition, since this embodiment is configured substantially in the same manner as the above-described embodiment, the same components are denoted by the same reference numerals, and only the characteristic portions will be described.

The TV door phone apparatus according to the present embodiment has an IS
HT describing the IP address assigned to P4 when connected
A file creation unit 28 for creating an ML file is provided, and the HTML file created by the file creation unit 28
4 to the WWW server, and the user on the go
4 can be browsed to know the IP address assigned to the TV intercom apparatus.

More specifically, the operation mode of the TV door phone master unit 2 selected and set by the user is set to the absence transfer mode for transferring information of an on-going visitor and a call of the camera-equipped entrance terminal 1. When the visitor presses the call button 13 of the camera-equipped entrance cordless handset, the control unit 22 of the TV door phone master unit 2 temporarily stores the visitor image captured by the video / audio capture unit 23 in the memory 24. I do. And
The data is converted into a format such as JPEG or GIF and stored under a predetermined file name in a predetermined location in the area of the WWW server unit 26 where the data for the homepage is stored. Images can be browsed by the provided homepage.

Next, as shown in FIG.
Is transmitted to the ISP 4 via the telephone network 3 by the transmitting / receiving unit 25.
(S21), and when connected to the ISP 4, an IP address is assigned from the ISP 4 (S22). Control unit 22
Uses this IP address as, for example, " http://133.185.111.1
23 ”(for example, tv.h
tm) is created by the file creation unit 28, and the created HTML file is stored in an FTP (File Tra
ISP4 FTP server 4 using nsfer protocol)
In step S23, the web page is transferred to a predetermined location in the area where the homepage HTML file provided by the WWW server 43 is stored (S23).

At the external terminal 6 such as a personal computer connected to the Internet, the user writes the IP address assigned to the TV intercom master unit 2 stored in the WWW server 43 of the ISP 4 by the WWW browser 61.
Request acquisition of TML file (tv.htm) (S24),
The WWW server 43 transmits the HTML file (tv.htm) to the external terminal 6 that has made the request (S25). User is W
The user browses the homepage in the HTML file received by the WWW browser 61, designates the IP address described in the homepage (for example, clicks the mouse on the IP address displayed on the WWW browser 61) and displays the TV. It connects to the WWW server unit 26 of the door phone master unit 2 and browses the image of the visitor on the home page stored in the TV door phone master unit 2 (S2).
6).

As described above, the TV intercom apparatus according to the present embodiment can be used even in a contract where the IP address is not fixed.
An HTML file describing the IP address assigned to the TV intercom apparatus is transferred to the WWW server 43 of P4, and is stored in the TV intercom master unit 2 by referring to the HTML file from the external terminal 6 (a personal computer or the like). Since the image of the visitor can be browsed, the page of the WWW server of the ISP 4 may be always specified from the external terminal, and the operability of connection from the external terminal can be improved.

As another aspect of the present embodiment, the ISP4
The IP address assigned at the time of connection with the ISP 4 is stored in the memory 24, and the next time the ISP 4 is connected, whether the assigned IP address matches the stored IP address at the time of the previous connection is compared. Only when they do not match, is the HTML file describing the IP address
The data is transferred to the WWW server 43 of SP4. With this configuration, the number of file transfers can be reduced, and the load on the network between the TV door phone master unit 2 and the ISP 4 can be reduced.

(Third Embodiment) FIGS. 5 and 6 show a TV door phone apparatus according to a third embodiment of the present invention. In addition, since this embodiment is configured substantially in the same manner as the above-described embodiment, the same components are denoted by the same reference numerals, and only the characteristic portions will be described.

The television intercom apparatus of this embodiment causes an external terminal to transmit a browsing request to an authentication page for IP address reference, and the ISP 4 CGI (Common Gateway).
(Interface) The server 45 causes the external terminal that has transmitted the browsing request to perform an authentication operation such as inputting a password, and notifies the IP address given to the TV intercom apparatus only when the authentication is normal. .

More specifically, the operation mode of the TV door phone master unit 2 selected and set by the user is set to the absence transfer mode for transferring the information of an on-going visitor and the call of the camera-equipped entrance terminal 1. When the visitor presses the call button 13 of the camera-equipped entrance cordless handset, the control unit 22 of the TV door phone master unit 2 temporarily stores the visitor image captured by the video / audio capture unit 23 in the memory 24. I do. And
The data is converted into a format such as JPEG or GIF and stored under a predetermined file name in a predetermined location in the area of the WWW server unit 26 where the data for the homepage is stored. Images can be browsed by the provided homepage.

Next, as shown in FIG.
Is transmitted to the ISP 4 via the telephone network 3 by the transmitting / receiving unit 25.
(S31), and when connected to ISP4, an IP address is assigned from ISP4 (S32). Control unit 22
Is a file describing this IP address (for example, tv
Is created by the file creation unit 28, and the created file is stored in the ISP 4 using the FTP.
The data is transferred to the CGI server 45 by the TP server 44 (S33).

The user uses an external terminal 6 such as a personal computer connected to the Internet to use a WWW browser 61 to store an authentication page (for example, http://www.xxx.ne.) Stored in the WWW server 43 of the ISP 4. .jp / logon.cgi (specified by URL) (S34).
The WWW server 43 requests an authentication password from the requesting external terminal 6 by the CGI server 45 (S3).
5).

When the user transmits the password through the external terminal 6 (S36), the CGI server 45 checks the password against a preset password, and if the password matches, the IP address described in the transferred file (tv). The address is transmitted (S37). The user connects to the IP address transmitted by the WWW browser 61 and browses the visitor's image on the homepage stored in the TV door phone master unit 2 (S38).

As described above, in the TV door intercom apparatus of the present embodiment, the external terminal 6 accesses the page for authentication, authenticates with the password, and only the external terminal whose authentication is normal has the TV intercom master unit 2. Since it is possible to view the visitor image stored in the TV door phone master device 2 by acquiring the IP address, the security can be improved.

Further, since the authentication operation is performed by the CGI server 45 of the ISP 4, the level of authentication is changed according to the response of the server side (for example, the password for authentication transmitted from an external terminal is encrypted to prevent leakage of the password). )
And convenience can be improved.

As another aspect of this embodiment, as shown in FIG. 7, the control unit 22 connects to the ISP 4 via the telephone network 3 by the transmission / reception unit 25 (S41). IP address is assigned (S
42). The control unit 22 creates a file describing the IP address (for example, a file named tv) by the file creation unit 28, and transfers the created file to the CGI server 45 by the FTP server 44 of the ISP 4 using FTP. (S43).

The user uses an external terminal 6 such as a personal computer connected to the Internet to use a WWW browser 61 to store authentication pages (for example, http://www.xxx.ne.) Stored in the WWW server 43 of the ISP 4. .jp / logon.cgi) (S44).
The WWW server 43 uses the CGI server 45 to request an authentication password from the requesting external terminal 6 (S4).
5).

When the user transmits the password through the external terminal 6 (S46), the CGI server 45 checks the password against a preset password, and if the password matches, the IP address described in the transferred file (tv). The address is transmitted (S47). When the user tries to connect to the IP address transmitted by the WWW browser 61, the W
The WW browser 61 transmits, as an environment variable, the address (variable name: HTTP_REFERER) of the Web page browsed immediately before to the TV door phone master unit 2 (S).
48). WWW server 43 of TV intercom master unit 2
Matches the URL of a preset authentication page (for example, http://www.xxx.ne.jp/logon.cgi) with the sent environment variable HTTP_REFERER, and connects if it matches. Is transmitted, and an HTML file containing the visitor information stored in the TV door phone master unit 2 is transmitted, and the subsequent communication is continued (S49). If they do not match, the connection is rejected and disconnected.

With this configuration, the external terminal 6 accesses the authentication page, performs authentication using a password, and changes the address of the page previously viewed by the TV intercom master unit 2 to the authentication page. , It is possible to reject a request to read a page for browsing the image of the visitor of the TV intercom master unit 2 directly without going through the authentication page, and to authenticate with the authentication page. Only the external terminal that has performed the authentication and obtains the IP address of the TV intercom master device 2 and can browse the information of the visitor stored in the TV intercom master device 2 can be improved, so that the security can be improved. it can.

In this embodiment, the connection between the TV door phone master unit 2 and the ISP 4 is such that the IP address via the telephone line network 3 is not fixed, but the present invention is not limited to this. ISP4 with dedicated line
The same effect can be obtained even if the connection is always made (the IP address is fixed).

Although one authentication page is used, the present invention is not limited to this. A plurality of authentication pages having different authentication levels may be prepared.

[0044]

As described above, according to the present invention, by notifying a user of an IP address given to an Internet service provider connected via a telephone line network, even a contract in which the IP address is not fixed can be reduced. It is possible to browse visitors' images stored in the main unit of the TV intercom from the outside via the Internet while maintaining security.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing a TV door phone device according to a first embodiment of the present invention.

FIG. 2 is a sequence diagram showing an IP address notification process of the TV door phone device according to the first embodiment of the present invention;

FIG. 3 is a schematic block diagram showing a TV door phone device according to a second embodiment of the present invention.

FIG. 4 is a sequence diagram showing an IP address notifying process of the TV intercom apparatus according to the second embodiment of the present invention.

FIG. 5 is a schematic block diagram showing a TV door phone device according to a third embodiment of the present invention.

FIG. 6 is a sequence diagram showing an IP address notifying process of the television door intercom device according to the third embodiment of the present invention.

FIG. 7 is a sequence diagram showing an IP address notifying process of the TV door phone device according to another aspect of the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Entrance cordless handset with camera 2 TV door phone master unit 3 Telephone network 4 Internet service provider (ISP) 5 Internet 6 External terminal 11 Camera (imaging unit) 12 Speaker 13 Button 21 Talk unit 22 Control unit 23 Video / audio capture unit (Image capture unit) 24 Memory 25 Transmission / reception unit 26 WWW server unit 27 E-mail creation unit 28 File creation unit 41 Router 42 Mail server 43 WWW server 44 FTP server 45 CGI server 61 WWW browser (WWW browsing software) 62 Mail browsing Software

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Chino 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. No.3-1, Matsushita Communication Industrial Co., Ltd. F-term (reference) GG03 5K101 KK02 KK13 LL01 LL04 NN01 NN11 NN21

Claims (8)

[Claims] 1. An image capturing unit for capturing an image, an image capturing unit for storing the image as an image file, and a WWW server unit for displaying a home page on a browser of the external terminal in response to a request from an external terminal on the Internet. Connecting to an Internet service provider via a telephone line network, transmitting and receiving data or transmitting and receiving e-mail, an e-mail creating unit for creating the e-mail, and a control unit, the control unit, When a visitor visits, an image file captured by the imaging unit is displayed on the homepage, the transmission / reception unit is connected to the Internet service provider via the telephone line network, and the Internet service is provided by the e-mail creation unit. The IP address assigned to the provider when connecting A television intercom apparatus having a function of creating an e-mail to a specified destination, transmitting the e-mail by the transmission / reception unit, and notifying the IP address to the preset destination. 2. An image capturing section for capturing an image, an image capturing section for storing the image as an image file, and a WWW server section for displaying a home page on a browser of the external terminal in response to a request from an external terminal on the Internet. A transmission / reception unit that connects to an Internet service provider via a telephone line network to transmit and receive data, a file creation unit that creates an HTML file, and a control unit,
When the visitor visits, the control unit displays an image file captured by the imaging unit on the homepage, connects the transmission / reception unit to the Internet service provider via the telephone line network, and causes the file creation unit to Causing the Internet service provider to create an HTML file describing an IP address given at the time of connection; causing the transmitting / receiving unit to transfer the HTML file to the Internet service provider;
A television door phone device having a function of posting a home page displaying an address. 3. An image capturing section for capturing an image, an image capturing section for storing the image as an image file, and a WWW server section for displaying a home page on a browser of the external terminal in response to a request from an external terminal on the Internet. Connecting to an Internet service provider via a telephone network, transmitting and receiving data, a transmitting and receiving unit, a file creating unit for creating a file, and a control unit, the control unit, when the visitor visits, An image file captured by an imaging unit is displayed on the homepage, the transmission / reception unit is connected to the Internet service provider via the telephone line network, and an IP address assigned when the file creation unit is connected to the Internet service provider. Is created, and the transmitting and receiving unit A television intercom device having a function of transferring the file to the Internet service provider and notifying the IP address only when authentication is normal on an authentication page provided by the Internet service provider. 4. The WWW server section, wherein the address of the home page viewed immediately before and the address of the authentication page among the environment variables transmitted by the browser at the time of a home page browsing request from the external terminal are displayed. The television door phone device according to claim 3, wherein the browsing of the home page displaying the image of the visitor is permitted only when the visitor matches. 5. A step of creating an image file that captures the image of a visitor at the time of a visitor, a step of creating a homepage that displays the image file, and connecting to an Internet service provider via a telephone network. Creating an e-mail to a preset destination describing an IP address assigned to the Internet service provider when connecting to the Internet service provider; and transmitting the e-mail to send the IP to the preset destination. Notifying the address of the visitor. 6. A step of creating an image file that captures the image of the visitor when the visitor visits, a step of creating a homepage that displays the image file, and connecting to an Internet service provider via a telephone network. And generating an HTML file describing an IP address given to the Internet service provider upon connection, transferring the HTML file to the Internet service provider and displaying the IP address to the Internet service provider. A method of publishing a visitor image of a TV door phone device, which comprises a step of posting a homepage. 7. A step of creating an image file that captures the image of a visitor at the time of a visitor, a step of creating a homepage that displays the image file, and connecting to an Internet service provider via a telephone network. And a step of creating a file describing an IP address given to the Internet service provider upon connection, and transferring the file to the Internet service provider to perform authentication on an authentication page provided by the Internet service provider. Displaying the IP address only when the display is normal. 8. An environment variable transmitted by a browser when a browsing request of a homepage displaying an image file of the visitor is present, when an address of the homepage previously viewed matches an address of the authentication page. The method according to claim 7, further comprising a step of permitting browsing.