ADSL Broadband Router enables Internet access to the company's intranet server _ route exchange

Company A accesses the Internet through ADSL, and the Intranet accesses the Internet through an ADSL Broadband Router sharing an ADSL cable.

With the development of Company A's business, the company needs to build A Web server for Internet access. The Web server mainly includes a company website, and is responsible for submitting daily orders and submitting business information of employees on business trips.

Add the company network after the Web server, such.

 

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Because the Internet access traffic to the server is small, the use of ADSL bandwidth can meet the needs of BENET servers, there is no need to change the access method. However, a fixed public IP address is required to access the Intranet server through the Internet, and the IP addresses obtained by dialing ADSL are different each time. Therefore, you need to change the virtual dialing method to the ADSL leased line method. The following uses the ADSL Broadband Router of TP-Link as an example to explain the configuration that needs to be changed after the server is added to the Intranet.

Note:

Because the public IP address obtained through virtual dialing is different each time, and the IP address resolved by the DNS server remains the same, it is impossible to access the Intranet server through the Internet.

If Dynamic DNS is used, you can use virtual dialing to access the Internet, while the Internet can access Intranet servers. A Dynamic DNS server sends a message about the ing between the domain name and IP address to the Dynamic DNS server after obtaining a public IP address through dialing, the Dynamic DNS server receives this entry and updates its own corresponding entry. When a user accesses this Intranet server, the resolution request is finally sent to the Dynamic DNS server for resolution.

Generally, Dynamic DNS servers are: Peanut shells and come networks.

Generally, for the sake of stability, websites generally use static IP addresses, which are resolved by the carrier's DNS server. Dynamic DNS servers generally use a large number of home websites.

1And change the network connection mode.

BENET has changed its virtual dialing method to ADSL leased line access to the Internet. Change the configurations of the Broadband Router. For example, select the static IP option from the drop-down menu of "WAN connection mode.

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Enter the following three items in the displayed configuration interface, for example:

 

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1) IP address and subnet mask of the WAN Port

The IP address of the WAN port cannot be specified at will. Configure the public IP address assigned by the ISP.

2) the gateway address corresponding to the WAN Port

The gateway IP address here is not the gateway of the client host, but the IP address of the peer connection device of the Broadband Router. The device belongs to the ISP and does not need to be configured by the terminal network administrator ).

3) Wan DNS server address

Specifies the wan dns server used by the client to resolve the domain name. Generally, different provinces and municipalities use different DNS servers. the IP address of the specific DNS server can be queried by the local telecom carrier.

2Configure the server to allow Internet access

Because the private address cannot be accessed from the Internet, the Web server needs a public IP address. The Web server uses port 80 to provide external services, therefore, you only need to configure a forwarding rule on the Broadband Router to forward the data traffic sent from the Internet to port 80 of the Web server on the Broadband Router's WAN port, this allows Internet access to the Intranet server.

On the Broadband Router menu bar, select "forwarding rules> virtual server", as shown in.

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After the virtual server is configured, users who access the Web service using a public IP address can be automatically transferred to the internal Web server. Click "Add new entry" on the virtual server configuration page, as shown in.

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On the "Configure virtual server entries" Page, enter the port number used by the Service, the IP address of the Intranet server, the protocol used, and whether the entry takes effect. Then, click "save" to return to vserver interface 5.6 ).

Because the private IP address cannot communicate directly with the public IP address, the Broadband Router needs to switch the addresses of the traffic that the private IP address communicates with the public IP address to NAT ), convert the private IP address in the data packet into a public IP address. The conversion rule is equivalent to configuring a static address translation including a port), which converts traffic destined for a public address to traffic destined for a private address.

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Common protocols are listed in common service port numbers. You can directly select related protocols from them. After selection, the server port number is automatically filled in. You can manually enter the Protocol ports not listed in common service port numbers.

 

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A Broadband Router can be managed through a LAN port or a WAN port. Previously, it was all managed through the LAN port. If the administrator needs to manage the Broadband Router on the internet, it needs to be managed through the WAN port, if the logon method is the same as that of the LAN port, the public IP address of the WAN port is used. http ://WanPort address). The port number is 80. If the virtual server with the Service port 80 is configured, the device cannot be managed through the WAN port. In this case, you need to set the port in "Security Settings> remote WEB management", as shown in Figure 5.7.

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Fill in "WEB Management port". The WAN port manages the port used by the Broadband Router. The default port is port 80. As shown in Figure 5.7, to change the port to 88, you must use "http ://WanPort address: 88" Manage the Broadband Router.

Remote WEB management IP Address: You can restrict the IP address of the Internet-managed Broadband Router.

 

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