JPH10312349A - Network connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make efficient access to a best provider device by writing the address of a provider device obtained from a router on a public line in a data storage part and transferring a domain name server request from a terminal device on a LAN to the provider device on the public line. SOLUTION: When a terminal device on the LAN sends a domain name solution request out, the domain name solution request is transferred to a DNS (domain name server) 9 on the internal LAN and if the name can not be solved there, a connection with the public line is made to request the address of the DNS server of an external router R. Here, a domain name solution request part 33 detects the address of the DNS server on the public line instead of the terminal device, and the obtained DNS server address is registered in a DNS server address storage part 32 through a DNS answer confirmation part 35 and an address data write part 34. Then a domain name solution request from a terminal device is transferred to the DNS server (provided device) on the public line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DNS response system for connecting to the Internet.

[0002]

2. Description of the Related Art When connecting to the Internet from a terminal device in a small office or home office, a connection request is usually made to a contract provider. The Internet was originally used on the assumption that a connection would be made if a connection request was made to one provider, but recently, the number of users has exploded and the communication capabilities of the providers have been different. For this reason, it is necessary to change a provider to be connected according to a communication destination and a communication purpose. A provider for connecting a terminal of a general user without a dedicated line to the Internet via a public line provides an IP address to a terminal that has requested connection to realize connection to the net.

[0003] On the other hand, the Internet is a protocol whose communication protocol and data environment have been set in historical background.
Operating systems (OSs) that drive terminals have also become widespread over a historical background, and are in a situation where they cannot be freely changed.

[0004] Institutions / organizations / organizations / terminals that make up the Internet each have a unique address (terminal identification number string). The same applies to providers that provide communication data supply services. When a terminal user makes a connection request to a provider, the telephone number and I
After transmitting the P address and confirming the connection, data exchange is performed.

[0005] The provider to be connected to the communication is specified by TC
This is performed using a network protocol called P / IP. Conventionally, when a terminal user attempts to change the connection provider, using predetermined application software,
Change your provider's domain name and phone number.

[0006]

A domain name replaces an address number, which is a string of dry and dry digits, with a name that is easy for a user to remember. When a connection destination device is accessed using a domain name, the other party's DNS (domain name server) receives a formal numeric string (address number).
Will send you back.

By the way, many net users connect to the provider's DNS using a domain name. However, as described above, the connection destination provider is specified using the TCP / IP protocol. This protocol is stored in the initialization file of the computer. Therefore, when changing the destination (provider), a new connection is required. It is necessary to rewrite the domain name and telephone number of the desired provider, and the operation is complicated. When performing paperwork on a computer monitor, the possibility of changing the connection destination provider as necessary is expected to increase in the future, but the operation of changing the domain name from the terminal device each time is cumbersome.

Accordingly, an object of the present invention is to make it easier to change the setting of the domain name of a communication destination, and to efficiently optimize the optimal DN.
This is to enable access to the S server (provider device).

[0009]

In order to achieve the above object, a network connection device according to the present invention includes a router device capable of accommodating a plurality of terminals through a LAN, and the router device has a line for connecting to a line. A connection server, a DNS server data storage unit capable of storing a predetermined number of DNS server data, and a DNS obtained by requesting a DNS server address on a line from a router on a public line via the line connection unit. A DNS server detection function for writing a server address to the DNS server data storage unit; and a DNS server on a public line or a D on an internal LAN via the DNS server detection function.
Means are provided for transferring a DNS request from a terminal device on the LAN to the NS server.

[0010]

The network connection device according to the present invention includes a router device capable of connecting a plurality of terminal devices. When a plurality of domain names are registered for free access, it is desirable that communication line routes to each domain name connection destination be independently secured and function.

The router device has a DNS server data storage unit that can store a predetermined number of DNS server data in an appropriate format (for example, WWW data format). A plurality of DNSs in which conventional computing devices are different for each provider
The problem when accessing the server is that the DNS server address to be accessed is fixed as initial setting information, and in the network connection method using a router device, the DNS server to be accessed is dynamically switched for each connection. Is impossible.

Further, the present invention has a function of requesting the address of the DNS server from the router on the public line.
If a DNS server is provided on the internal LAN, LA
When a DNS request from a terminal device on N is detected, a domain name resolution request is first transferred to a DNS server on the internal LAN. If the request cannot be resolved there, a connection to the public line is established by automatic dial-up. D
Request NS server address. DNS obtained here
The server address is automatically registered in the DNS server address storage unit via the writing unit, and the domain name resolution request from the terminal device is automatically transferred. As a result, the operation burden on the terminal device is reduced, and the user is automatically connected to the provider only by specifying the provider desired to connect with, for example, WWW software on the monitor. If the DNS server address cannot be automatically detected due to limitations due to the router function on the provider side, the burden can be similarly reduced by manually registering the DNS server address in advance.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a network connection device according to the present invention. A device (AutoDNS) 10 according to the present invention includes, for example, a terminal adapter device (T
A) In a device provided with 11 and the router device 12, it can be disposed on the router device 12 side. Of course, the device according to the present invention may be provided inside the TA. In the device shown in this embodiment (a configuration including a TA and a router at the same time), the terminal device 20 is connected to the DTE port of the TA 11 and can be switched to the router device 12 as necessary. Reference numeral 27 denotes a switching control unit. The router device 12
On the side, a control unit (for example, PPP format) 40 for controlling an authentication procedure in connection with the connection with the TA 11 is provided.

The route controller 31 is connected to the router device 12.
Via a plurality of, for example, three terminal devices 14, 15,
16 can be connected. The router device 12 is connected to each of the terminals 14 to 16
Although it performs functions such as preventing collision of data sent from the Internet, as long as it is used in homes or small offices, it is sufficient to enable connection of, for example, about eight terminals. Reference numeral 6 denotes a line connection unit for connecting to the public line 8.

The router device 12 includes a domain name resolution requesting unit 33 that sends a domain name resolution request to the router R on the public line or the DNS server when there is a DNS server on the internal LAN. When a domain name resolution request is sent from a terminal device on the LAN, the internal LA
If you have a DNS server (not shown) on N,
First, a domain name resolution request (a request for matching the domain name and the IP address) is transferred to the DNS server 9 on the internal LAN, and if the request cannot be resolved there, the connection to the public line is made by automatic dial-up.
Request the address of the S server. Here, the domain name resolution requesting unit 33 replaces the terminal device 20 with the D
The address of the NS server is detected. The DNS server address thus obtained is sent to the address data writing unit 34 via the DNS response confirmation unit 35, and the address data writing unit 34 automatically registers the data in the DNS server address storage unit 32. . After detecting the DNS server address, the domain name resolution request sent from the terminal device (for example, 20) is transferred to the DNS server on the public line. D
The response from the NS server is transferred by the router device 12 to the terminal device of the transmission source.

Since the DNS server data is automatically registered in this way, the DNS server system can be operated efficiently without changing the settings on the terminal device 20 side even when connecting to a different provider.

Reference numeral 37 denotes an IP address transmitting unit for transmitting an IP address at the time of connection to the public line 8;
Reference numeral 9 denotes a connection confirmation unit for confirming a communication connection.

Therefore, according to such a network connection device, a user can perform Internet communication in an environment where the user is pseudo-connected to the other party's DNS from the beginning without having to change his or her own computer device. Since the necessary data is automatically registered, even if the router device 12 is not actually connected to the public line 8, the user gets a feeling that the terminal device 20 is virtually connected to the other party's DNS. I can do it.

[0019]

As described above, according to the network connection apparatus of the present invention, the cumbersome operation involved in the change setting of the domain name of the communication destination can be eliminated and the DN can be efficiently provided.
It is possible to make a communication connection to an S server (provider device).

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a network connection device according to the present invention.

[Explanation of symbols]

 Reference Signs List 8 public line 9 DNS server 11 terminal adapter device (TA) 12 router device 14, 15, 16, 20 terminal device 21 DTE port 27 switching control unit 31 route controller 32 DNS server data storage unit 33 domain name resolution requesting unit 34 address data Writing unit 35 DNS response confirmation unit 37 IP address transmission unit 39 Connection confirmation unit

Claims (1)

[Claims] 1. A router device capable of accommodating a plurality of terminals through a LAN, the router device comprising line connection means for connecting to a line, and a DNS server data storage unit capable of storing a predetermined number of DNS server data. And a request for a DNS server address on the line to a router on the public line via the line connection means.
DNS server detection means for writing an S server address to the DNS server data storage unit, and DNS on a public line via the DNS server detection means
A network connection device comprising: means for transferring a DNS request from a terminal device on a LAN to a server or a DNS server on an internal LAN.