Several methods and comparisons of Internet sharing in LAN

Multiple computers to be able to share an account or an IP address of the Internet, the first will want to access the computer through the hub connected to a local area network: Each computer in the local area network installed a network card, add configure TCP/IP protocol, assign a fixed IP address, And then take out a local network of a better performance of the computer to do server use, then the server must add a second network card, the IP set up by the ISP should be noted that the client's computer IP configuration in the gateway to be set to the server's first network card IP address, DSN set to the ISP provided by the DNS IP ; The browser is set to never dial-up connections, which can be connected over a local area network.

Third-party software access

At present, there are two main types of third-party software used in small LAN for users to share the Internet: Proxy Server class (proxies server) and gateway Class (Gate Way). Proxy server class software installation, Setup is simple, easy to use, users of the Internet faster, and the gateway class software generally relatively large, itself to play a gateway (protocol Converter) role, the speed of users to the Internet is also affected by the installation is relatively cumbersome, the application of less, However, Gateway software can play the role of network firewall, but also the function of a single proxy server class software can not be compared with it.

Depending on the requirements of the software, some software can only be installed on the server side, but also need to be installed on the server and client computers, according to the Internet connection mode features require different settings.

Commonly used Third-party software such as Wingate, Sygate and so on are very rich, especially the firewall function can separate the internal information from the external information, through the filtering of the firewall, plays the security protection function to the computer data inside the local area network. Therefore, it is more suitable for the large amount of traffic, and the data security of the intranet requires higher LAN share to be used online.

Two, with the Windows operating system with the connection Sharing

The features of Internet Connection Sharing are integrated in Windows98 SE, Windows Me, and Windows2000. The server-side Internet connection is set up as a proxy service (Internet Connection Sharing) according to the system prompts, and when the client wants to access the Internet, it first requests to the proxy server, relays through the proxy server, sends the request, and the external data also needs to be relayed to the proxy server. To get the information you need.

Internet Connection Sharing has a single function and does not have the protection of the Intranet, which poses a great threat to the security of the network, and only applies to users with small network size and low security requirements.

Iii. network address Translation with Windows Server (NAT)

Routers can transform packets between the LAN and the Internet, and can effectively secure the computers in the LAN, and the network address translation of Windows server translates the software routing function. On the server where Windows Server is installed, install and set the Routing and Remote Access feature to complete the setup as prompted by the system.

If the DHCP functionality of Windows Server servers is enabled, the IP of the computers within the LAN can be set up for automatic acquisition, thereby easing the burden of network management and maintenance. So network address translation is better suited to configure a more complex Windows2000 server/advance Server LAN usage.

Four, directly through the hardware router share

Connect the router's WAN end to the Internet,lan end to the LAN, and the router WAN end has to be set differently because the ISP offers different access modes.