JP2003060671A - Information publishing server virtual operating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information publishing server virtual operating system for an installer to execute a continuous vertical operation of an information publishing server, using a plurality of computers. SOLUTION: The system 104 sets an access destination and a mail address of other computer connected to an internet 103, when a computer 101 is connected to an ISP 102. When connection of the computer 101 with the ISP 102 is cut off, it changes the access destination and the mail transfer address of the other computer to an URL of a server 102 and an FQDN of a mail server 102, respectively. Thus the server 102b and the mail server 102a are usable, instead of the computer 101.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for enabling an installer to virtually operate an information disclosure server, which is a computer for information disclosure, using a plurality of computers.

[0002]

2. Description of the Related Art A computer connecting to the Internet requires an internet protocol address (IP address). Internet Protocol is currently Version 4
And there is Version 6. IP with Version 4
The number of bits assigned to an address is 32 bits, and is expressed in decimal notation by dividing it into 8 bits like 10.7.1.2. IP on the other version 6
The number of bits assigned to the address is 128, and 3eff: 4A50: 6809: A478: c1.
For example, 45: fc97: d329: 290b is divided into 16 bits and expressed in hexadecimal.

Information disclosure (transmission) on the Internet
Installs a computer for that purpose as a server (information disclosure server) and uses an easy-to-understand URL (Un
iform Resource Locators) are made public. The URL is an FQDN (Full Quolified Domain Name) that is a combination of at least a host name and a domain name.
And the location of the file on the server. In addition,
As is well known, there are FQDNs having a subdomain name in addition to the host name and domain name.

The combination of host name and domain name is IP
DNS (Domain Nam)
e System), which is specified in RFC1035,
Dynamic changes to DNS data are specified in RFC2136.

When the information disclosure server is accessed by the published URL, the FQDN of the URL is inquired of the DNS and converted into an IP address. As a result, the server is connected by the converted IP address.

[0006] By the way, it is general that the connection to the Internet is made through the ISP by contracting with an Internet service provider (ISP) which provides connection service with the Internet.

In the constant connection service in ISP, an IP address is fixedly assigned to the information disclosure server. However, in the emergency connection service equivalent to dial-up, the IP address given to the server changes every time the connection is made. Therefore, in the emergency connection service, an A record indicating the correspondence between the FQDN and the IP address is registered in the DNS server when the server is connected, and the corresponding A record registered when the server is disconnected or before the disconnection is performed by the DNS server. To delete.

The Web hosting service provided by the ISP uses the host machine of the ISP to send information by WWW. However, the target of information transmission is often limited to disclosure of only data such as HTML and images, and application programs cannot be started. For this reason, it is common for users to install their own servers so that application programs can be started from the WWW.

When an information disclosure server is installed in a general home or a general store, there is often no facility for operating the server overnight, so the server is often stopped especially at night. Conventionally, when the connection is terminated by stopping the server, the A record is deleted from the DNS server accordingly. This allows the server installer to
Or, it would not be possible to transmit information unless an alternative to it was connected to the Internet.

At present, there are many people who own or use a plurality of computers by themselves. From this, it is considered that even if the information disclosure server is stopped, other computers can be used by other computers for information transmission or for confirmation of opinions and requests transmitted from the users. In other words, it is considered that many people can virtually operate the information disclosure server even if only a part of the function of the information disclosure server is stopped. Therefore, it can be considered that there are not a few of such persons who want to perform virtual continuous operation of the information disclosure server using a plurality of computers.

An object of the present invention is to provide an information disclosure server virtual operation system for an installer to perform virtual continuous operation of the information disclosure server using a plurality of computers.

[0012]

In the information disclosure server virtual operation system of the present invention, the installer uses a plurality of computers to perform virtual continuous operation of the information disclosure server, which is a computer for information disclosure. System of
FQ of computer connected to the Internet in an emergency
Among the plurality of computers, a DNS server that dynamically registers and deletes the first data indicating the correspondence between the DN and the IP address, according to the connection of the computer with the Internet and the termination of the connection. When the first computer used as the information disclosure server terminates the connection with the Internet, the second computer, which is a computer other than the first computer, is set as the access destination among the plurality of computers, Access destination setting means for canceling the setting of the access destination when the first computer is connected to the Internet.

The access destination setting means is a URL accessed by another computer as an access destination,
It is desirable to include at least one of the mail transfer destination and the mail transfer destination.

In the Internet connection service equivalent to dial-up, which is changed every time the IP address given to the computer connecting as the server is connected, the A record registration process to the DNS server is performed after the server connection and before the server connection is disconnected. Performs A record deletion processing to the DNS server. In the present invention, attention is paid to the triggers for doing so, and the UR that is the access destination of another computer
L transfer destination switching processing and MX record switching processing to the DNS server are performed in conjunction with these triggers.

The FQDN is acquired from the A record registered in the DNS server, and a URL (herein referred to as URL1) is created from the FQDN. One or more URLs that can be accessed separately from URL1 (herein referred to as URL2),
register. The URL transfer destination switching process is, for example, URL1.
Is a representative URL, and access to URL1 is linked to the above-mentioned trigger to switch to URL2.

For example, as the MX record to be registered in the DNS server, one or more mail transfer destinations different from those corresponding to the A record are prepared. The mail transfer destination by the MX record corresponding to the A record is MX1,
If the mail transfer destinations based on other MX records are called MX2, the MX record switching process uses the mail transfer destination MX1 corresponding to the MX record corresponding to the A record as a typical mail transfer destination, and the mail transfer destination is the above trigger. Is a process of switching to MX2 in conjunction with.

When at least one of the URL transfer destination and the mail transfer destination is switched as an access destination in association with the above trigger as described above, the computer functioning as a server is not connected to the Internet. However, it is possible to use a computer other than that computer as a substitute for it. As a result, even if a computer that functions as a server is not always connected, it can be virtually continuously operated.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a system to which the information disclosure server virtual operation system according to the present embodiment is applied.

As shown in FIG. 1, the system includes a computer 101 used as an information disclosure server having a host name "abcd", an Internet service provider (ISP) 102 to which the computer 101 dials up, and The ISP 102 is constructed using the Internet 103 that is the target of the connection service and the system 104 that functions as the information disclosure server virtual operation system according to the present embodiment.

The ISP 102 is provided with a mail (Mail) server 102a for relaying mail exchanges and a server 102b for the ISP 102 to provide a web hosting service. Here, it is assumed that the installer of the computer 101 performs virtual continuous operation of the information disclosure server using the mail server 102a and the server 102b installed in the ISP 102 in addition to the computer 101. To The computer (information disclosure server) 101
FQDN is abcd. isp. net, URL is ht
tp: // abcd. isp. The domain name of the system 104 is wxyz.net. com.

FIG. 2 is a diagram showing a functional configuration of the present system 104.

In FIG. 2, reference numeral 201 denotes a GUI (Graphical User Interface) realized by various application programs executed by using the www server function, and performs various processes for HTML data. Reference numeral 202 denotes a user authentication function for authenticating with a user name and a password transmitted from the accessing computer. 203 is the GUI 20
The host name registration function for registering the FQDN having the host name specified in 1 is an IP address registration function for registering the IP address associated with the FQDN registered by the host name registration function.

Reference numeral 205 is an IP address change function for changing the IP address registered by the IP address registration function 204. Reference numeral 206 denotes an IP address deletion function for deleting the IP address registered by the IP address registration function 204 or the IP address modified by the IP address modification function 205. 207 is
This is a mail transfer destination registration function for registering a host name corresponding to the FQDN registered by the host name registration function 203 as a mail transfer destination. Reference numeral 208 denotes a mail transfer destination switching function for switching the mail transfer destination to a host name different from the host name registered by the mail transfer destination registration function 207.

Reference numeral 209 is a URL assigning function for assigning a URL using the FQDN registered by the host name registration function 203, and 210 is another URL associated with the URL assigned by the URL assigning function 209. This is a URL registration function for doing. 211 is a URL assigning function 20
9 is a URL transfer destination switching function for switching the URL given by 9 and the URL registered in the URL registration function 210. Here, for convenience, the URL assigned by the URL assigning function 209 is referred to as URL1, and the URL registered in the URL registration function 210 is referred to as URL2.

Reference numeral 212 denotes a UR for transferring access to the URL switched by the URL transfer destination switching function 211.
This is an L transfer function. Reference numeral 213 denotes a DNS server based on RFC1035, which is equipped with a function of dynamically or manually changing data based on RFC2136.

The above functions 201 to 212 are realized by one or more servers (computers). Thereby,
The system 104 is constructed using a plurality of servers including a dynamic DNS server (hereinafter simply referred to as a DNS server) 213.

Next, the operation of the present system 104 having the above configuration will be described in detail with reference to various explanatory views shown in FIGS.

FIG. 3 shows the computer 1 that has accessed.
11 is an operation flowchart showing an operation of the present system 104 for responding to the request from 01. In FIG. 3, important ones of the operations to be executed after the authentication is extracted are shown. First, with reference to FIG. 3, an operation executed to respond to a request from the computer 101 that has accessed and a flow thereof will be described in detail.

First, in step S1, the handling of the A record storing the data indicating the correspondence between the FQDN and the IP address is determined from the request received from the computer 101 after authentication. If the request from the computer 101 is associated with the connection with the Internet 103, the A record is regarded as being registered, and the process proceeds to step S2.

In step S2, the IP address is acquired from the computer 101. In the subsequent step S3, the host name is further acquired. Step S4 to move to the next
Then, the DNS server 2 uses the correspondence between the acquired IP address and the FQDN having the acquired host name as an A record.
Register 13 After that, it transfers to step S5.

In step S5, access is set to be transferred to the URL (URL1) created using the FQDN in the registered A record. Next step S
In No. 6, MX (Mail Exchange) indicating the correspondence relationship between the domain name and the host name of the mail transfer destination so that the host name corresponding to the URL1 becomes the mail transfer destination in accordance with the setting of URL1 as the transfer destination. Record the DNS
It is registered in the server 213. The corresponding MX record registered by executing step S10 described below is DN.
It is deleted from the S server 213. By performing such a thing, the process accompanying the registration of the A record ends.

On the other hand, when the request from the computer 101 is associated with the termination of the connection with the Internet 103, it is determined in step S1 that the handling of the A record is erasure, and the process proceeds to step S7.

In step S7, the host name is acquired from the computer 101. In the following step S8, the A record storing the FQDN having the acquired host name is DN
It is deleted from the S server 213. After that, step S9
Move to.

In step S9, a U created by using the FQDN in the A record along with the deletion of the A record.
The transfer destination of access is switched from RL1 to URL2.
In the next step S10, MX (Mail Exchang) indicating the correspondence relationship between the domain name and the host name of the mail transfer destination is set so that the host name corresponding to the URL2 becomes the mail transfer destination.
e) Register the record in the DNS server 213. The MX record corresponding to the deleted A record is deleted from the DNS server 213. By doing something like that,
The process associated with the registration of the A record ends.

In this way, in this embodiment, the access transfer destination and the mail transfer destination are changed according to the connection of the computer 101 to the Internet 103 and the end of the connection. Therefore, the computer 10
The user (installer) of No. 1 can operate by using a computer other than the computer 101 so that the computer 101 is always connected to the Internet 103.

FIG. 4 is a sequence diagram showing the operation of the present system 104 when registering an A record. Next in FIG.
And the computer 101 to the Internet 10
3, that is, the operation of the system 104 at the time of A record registration performed after the first connection with the ISP 102 will be described in detail. The host name of the computer 101 is “abcd”.

A user sets the computer 101 to the ISP 10
2 dial-up connection (sequence S2
1), the ISP 102 assigns an IP address to the computer 101 with the host name abcd (sequence S22). Here, the assigned address is "AD
DRESS1 ".

The computer 101 to which the IP address ADDRESS1 is assigned accesses the present system 104 by HTTP using a Web browser (sequence S23). The GUI 201 of the system 104 receives the user name and password transmitted from the accessed computer 101, and receives the user authentication function 20.
2 to request authentication and receive the authentication result from the user authentication function 202 (sequence S24). By performing such authentication, services limited to registered users are provided. The user name and password required for the authentication are issued at the time of contract with the ISP 102 or specified by the contractor.

When the user authentication function 202 confirms that the user (user of the computer 101) is a registered person, the GUI 201 sends the host name abcd to the host name registration function 203 (sequence S25), and the IP address registration function. An IP address ADDRESS1 is assigned to 204.
Is sent (sequence S26). The host name abc
The GUI 201 obtains d and the IP address ADDRESS1 from the computer 101, for example.

The host name registration function 203 and the IP address registration function 204 send the host name abcd and IP address ADDRESS1 to the DNS server 213, and request them to be registered as an A record (sequence S27). Upon receiving the request, the DNS server 213 receives the abcd. wxyz. com and ADDR
An A record that associates ESS1 will be registered.

On the other hand, the GUI 201 is the abcd. wxy
z. com is sent to the mail transfer destination registration function 207 to register the FQDN as the mail transfer destination (sequence S28). The mail transfer destination switching function 208 includes the ab
cd. wxyz. A mail server 102a installed in the ISP 102 as a mail transfer destination instead of com.
Is the mail forwarding destination mail. isp. Net is sent and registered (sequence S29). The mail transfer destination switching function 208 is operated by an instruction from the GUI 201.
Host name abcd registered in the host name registration function 203
The DNS server 2 registers the MX record indicating the corresponding relationship so that the computer 101 of FIG.
13 is requested (sequence S30). DNS server 2
13 receives the request, and abcd. wx
yz. The MX record indicating com as the mail transfer destination will be registered.

The URL assigning function 209 is used by the DNS server 2
FQDN to U in the A record newly registered in 13
As RL1, http: // abcd. wxyz. co
m is generated and notified to the GUI 201 (sequence S31). The GUI 201 uses, as URL2, which is a substitute for the notified URL1, URL2, which is a URL prepared on behalf of the computer 101 by the server 102b installed in the ISP 102, http: // www. is
p. The net / to abcd are sent to the URL registration function 210 to be registered (sequence S32). In the URL transfer destination switching function 211, the URL assigning function 209 is the GUI 201.
Along with the notification of the URL1 to the URL, the URL transfer function 212 is specified (set) as the access transfer destination (sequence S33).

The registration of the mail transfer destination performed in the above sequence S29 and the U performed in the above sequence S32 are performed.
The registration of the RL transfer destination is performed as needed at any time. Therefore, they do not have to be performed in the flow shown in FIG.

When access to the computer 101 is requested from another computer connected to the Internet 103 by performing various settings including registration of A and MX records as described above, as shown in FIG. The computer issuing the request will access the computer 101. Further, when the mail server 601 connected to the Internet 103 receives the mail addressed to the computer 101, as shown in FIG. 6, the mail transfer destination is inquired to the system 104, and the mail is transmitted to the computer 101. (Delivery).

FIG. 7 is a sequence diagram showing the operation of the present system 104 when changing the IP address. Next, referring to FIG. 7, connect the computer 101 to the Internet 1
03, that is, I for reconnecting with ISP 102
This system 10 performed when the P address is changed
The operation of No. 4 will be described in detail.

The user sets the computer 101 to the ISP 10
2 is reconnected by dial-up connection (sequence S41), the ISP 102 reassigns the IP address to the computer 101 with the host name abcd (sequence S42). Here, the newly assigned address is “ADDRESS2”.

The computer 101, to which the IP address ADDRESS2 is assigned, accesses the system 104 by HTTP using a Web browser (sequence S43). The GUI 201 of the system 104 receives the user name and password transmitted from the accessed computer 101, and receives the user authentication function 20.
2 to request authentication, and receive the authentication result from the user authentication function 202 (sequence S44).

When the user authentication function 202 confirms that the user (user of the computer 101) is a registered person, the GUI 201 displays the IP address ADDRESS.
2 to the IP address change function 205 (sequence S
45). In the change function 205, the FQDN is the host name ab of the computer 101 in the registered A record.
ADDRESS the IP address of the A record with cd
The DNS server 213 is requested to change to 2 (sequence S46). Upon receiving the request, the DNS server 213 changes the IP address in the corresponding A record to ADDRESS2.

Thus, even if the IP address in the A record is changed, the access transfer destination and the mail transfer destination are not changed. Therefore, the access is continued as shown in FIGS. 5 and 6.

FIG. 8 is a sequence diagram showing the operation of the present system 104 when the A record is deleted. Next, FIG.
And the computer 101 to the Internet 10
3, that is, the operation of the present system 104 at the time of deleting the A record performed before disconnecting the connection with the ISP 102 will be described in detail. Here, the computer 101
The description will be made assuming that ADDRESS2 is assigned as the IP address.

The computer 101 accesses this system 104 by HTTP using a Web browser (sequence S51). GUI20 of this system 104
1 receives the user name and password transmitted from the accessed computer 101, sends the user name and password to the user authentication function 202, requests authentication, and sends the user authentication function 2
The authentication result is received from 02 (sequence S52).

When the user authentication function 202 confirms that the user (user of the computer 101) is a registered person, the GUI 201 instructs the IP address deletion function 206 to send the host name a to the request from the computer 101.
A request is made to delete the IP address ADDRESS2 corresponding to bcd (sequence S53). The erasure function 206
In response to the request, the DNS server 213 is requested to delete the A data indicating the correspondence between the FQDN having the host name abcd and the IP address ADDRESS2 (sequence S54). The DNS server 213 that has received the request deletes the corresponding A record.

When the deletion function 206 requests the DNS server 213 to delete the A record, the deletion function 206 instructs the mail transfer destination switching function 208 to switch the mail transfer destination (sequence S55). By that instruction, switching function 2
08 deletes the MX record indicating the FQDN in the A record requested to be deleted as the mail transfer destination, and instead deletes the registered mail transfer destination mail. isp. net
The DNS server 213 is requested to register an MX record indicating (mail server 102a supports) as a mail transfer destination (sequence S56). The DNS server 213 deletes the MX record requested to be deleted, and registers the MX record requested to be registered.

On the other hand, the IP address deletion function 206
The RL transfer destination switching function 211 is instructed to switch the transfer destination of the access from the URL 1 having the host name abcd to the URL 2 of the server 102b (sequence S57). According to the instruction, the switching function 211 follows the URL transfer function 2
Specify URL2 as the transfer destination of access to 12 (setting)
(Sequence S58). Then the computer 10
1 disconnects the connection to the ISP 102 (sequence S59).

When the computer 101 is requested to be accessed from another computer connected to the Internet 103 by performing various settings including registration of the A and MX records as described above when disconnecting from the ISP 102. As shown in FIG. 9, the computer issuing the request accesses the server 102b instead of the computer 101. As shown in FIG. 10, when another mail server 601 connected to the Internet 103 receives a mail addressed to the computer 101, the mail transfer destination is inquired to the system 104, and the mail is transferred to the computer 101 instead of the computer 101. Will be sent (delivered) to the mail server 102a of the ISP 102.

FIG. 11 is a sequence diagram showing the operation of the present system 104 at the time of A record registration when the computer 101 is reconnected to the Internet 103. Next, referring to FIG. 11, the computer 10
1 with the Internet 103, that is, the ISP 102 again,
The operation of the present system 104 at the time of A record registration performed after the connection is described in detail.

The user sets the computer 101 to the ISP 10
2 dial-up connection (sequence S6
1), the ISP 102 assigns an IP address to the computer 101 with the host name abcd (sequence S22). Here, the assigned address is "AD
DRESS 3 ".

The computer 101 to which the IP address ADDRESS3 is assigned accesses the system 104 by HTTP using a Web browser (sequence S63). The GUI 201 of the system 104 receives the user name and password transmitted from the accessed computer 101, and receives the user authentication function 20.
2 to request authentication, and receive the authentication result from the user authentication function 202 (sequence S64).

When the user authentication function 202 confirms that the user (user of the computer 101) is a registered person, the GUI 201 sends the host name abcd to the host name registration function 203 (sequence S65), and the IP address registration function The IP address ADDRESS3 is assigned to 204.
Is sent (sequence S66).

The host name registration function 203 and the IP address registration function 204 respectively send the host name abcd and IP address ADDRESS3 to the DNS server 213 and request them to be registered as an A record (sequence S67). Upon receiving the request, the DNS server 213 receives the abcd. wxyz. com and ADDR
An A record that associates ESS3 will be registered.

The IP address registration function 204 has a new A
When the record is registered in the DNS server 213, the mail transfer destination switching function 208 is instructed to switch the mail transfer destination (sequence S68). According to the instruction, the switching function 208 causes the registered mail transfer destination mai
l. isp. The MX record indicating "net" (corresponding to the mail server 102a) as the mail transfer destination is deleted, and the DNS server 213 is requested to register the MX record indicating the FQDN in the A record newly requested for registration as the mail transfer destination (sequence). S69). DNS server 213
Deletes the MX record requested to be deleted and registers the MX record requested to be registered.

On the other hand, the IP address registration function 204 uses the U
URL of the server 102b to the RL transfer destination switching function 211
From 2 to the URL 1 having the host name abcd, an instruction to switch the access transfer destination is given (sequence S70). According to the instruction, the switching function 211 follows the URL transfer function 2
Specify URL1 as the transfer destination of access to 12 (setting)
Yes (sequence S71).

When access to the computer 101 is requested from another computer connected to the Internet 103 by performing various settings including registration of the A and MX records as described above when reconnecting to the ISP 102. As shown in FIG. 5, the computer issuing the request again accesses the computer 101. Further, another mail server 601 connected to the Internet 103 is a computer 1 as shown in FIG.
When the mail addressed to 01 is received, as a result of inquiring the mail transfer destination to the present system 104, the mail is again transmitted (delivered) to the computer 101.

In this embodiment, the computer 1
In addition to 01, the number of URLs and the number of mail transfer destinations that are transfer destinations of access is one, but the number of access destinations may be two or more. When two or more computers are prepared, the computer 101 is the Internet 10
It is also possible to dynamically change the access destination while not connected to the server 3.

[0065]

As described above, according to the present invention, the A record registration processing to the DNS server is performed after the server connection,
A to the dynamic DNS server before disconnecting the server
At least one of the URL transfer destination switching process and the MX record switching process to the DNS server is performed in response to the record deletion process. For this reason,
Even if the server is not connected to the Internet,
At least one of accessing a specific URL and forwarding a mail to a specific mail address can be performed. Even if the server is connected in an emergency, it is possible to provide a service equivalent to a constant connection. Thereby, virtual constant operation of the server is realized. Further, as a result of the virtual constant operation of the server being realized, it is possible to inexpensively and easily transmit information using the Internet.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a system to which an information disclosure server virtual operation system according to the present embodiment is applied.

FIG. 2 is a diagram showing a functional configuration of the system (information disclosure server virtual operation system).

FIG. 3 is an operation flowchart showing the operation of the present system for responding to a request from a computer that has accessed.

FIG. 4 is a sequence diagram showing an operation of the present system when registering an A record.

FIG. 5 is a diagram illustrating an access destination of another computer after A record registration.

FIG. 6 is a diagram for explaining a mail transfer destination after A record registration.

FIG. 7 is a sequence diagram showing an operation of the present system when changing an IP address.

FIG. 8 is a sequence diagram showing an operation of the present system when deleting an A record.

FIG. 9 is a diagram illustrating an access destination of another computer after A record deletion.

FIG. 10 is a diagram illustrating a mail transfer destination after A record deletion.

FIG. 11 is a sequence diagram showing an operation of the present system at the time of registering an A record when the computer is reconnected to the Internet. next

[Explanation of symbols]

101 computer 102 internet service provider 102a mail server 102b server 103 internet 104 this system (information disclosure server virtual operation system) 201 GUI 202 user authentication function 203 host name registration function 204 IP address registration function 205 IP address change function 206 IP address deletion Function 207 Mail transfer destination registration function 208 Mail transfer destination switching function 209 URL assignment function 210 URL registration function 211 URL transfer destination switching function 212 URL transfer function 213 Dynamic DNS server

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tatsuya Kato             14-4 Minami-Asama-cho, Nishi-ku, Yokohama-shi, Kanagawa             Company Ivy Network (72) Inventor Masato Morisaki             14-4 Minami-Asama-cho, Nishi-ku, Yokohama-shi, Kanagawa             Company Ivy Network (72) Inventor Akira Shinoda             223-1, Yamashita-cho, Naka-ku, Yokohama-shi, Kanagawa             NTT Software Corporation F-term (reference) 5B089 GA11 JA35 KA06                 5K030 HA08 HC01 HD09 LD11

Claims (2)

[Claims] 1. A system for an installer to perform virtual continuous operation of an information disclosure server, which is a computer for information disclosure, using a plurality of computers, and is an FQ of a computer that is connected to the Internet in an emergency.
A DNS server that dynamically registers and deletes the first data indicating the correspondence relationship between the DN and the IP address, and that dynamically connects the computer to the Internet and terminates the connection. In the case where the first computer used as the information disclosure server terminates the connection with the Internet, the second computer, which is a computer other than the first computer, is set as an access destination among the plurality of computers. And the first
If your computer is connected to the Internet,
An information disclosure server virtual operation system comprising: an access destination setting means for canceling the setting of the access destination. 2. The access destination setting means is a URL accessed by another computer as the access destination,
And at least one of a mail transfer destination, and the information disclosure server virtual operation system according to claim 1.