ADSL Broadband sharing

1. Some friends use the ADSL modem with the Ethernet interface to access the Internet, and then build a LAN through the hub or switch and several machines, and then share the Internet solution.

The following uses the Real-Time ADSL2110-EH modem (with routing function) as an example to introduce the relevant settings. Generally, the default IP address of the modem is 192.168.10.1, which is used as the client (each machine connected to the hub or vswitch) after the NIC is connected to the hub or vswitch, you need to install the TCP/IP protocol and the IPX/SPX protocol of the LAN, and then set the IP address 192.168.10.x, which is the same as the domain in which the modem is located. The subnet mask is 255.255.255.0. The default gateway: 192.168.10.1 (the IP address of the modem), while the DNS server is set to the IP address of the local telecom network. You can select other projects by default.

If you are using a usb modem with 5800u and similar functions without routing, you can also share the internet. One of the machines connected to the ADSL modem acts as a host, and, like other machines, connects to the hub or switch through a network cable. On the host, set the IP address 192.168.0.1, subnet mask 255.255.0, Default Gateway: 192.168.0.1, and DNS server to the IP address of the local telecom network, and select share ADSL through the LAN, in addition, Windows XP firewall cannot be enabled on the host; otherwise, the Internet cannot be accessed. As a client, you only need to select to access the Internet through the lan. If it is a WINXP system, you can access the Internet without configuring it, the main drawback of this method is that the performance of servers is better, and once the server is shut down, other users cannot access the Internet.

2. Why is the network speed slow after multiple computers share the Internet?

The speed of Internet sharing mainly depends on the Internet access method and network bandwidth used. Currently, common ADSL speeds include 512 kbps, 1 MB, and 2 MB, cable Modem and residential broadband bandwidth are even 10 m, but the actual speed is usually dependent on the quality of service provided by the supplier, and sometimes cannot reach the nominal speed. Generally, a 1 mbps bandwidth network can be used by 1-12 people for browsing, chatting, and sending and receiving emails. All users share a 1 mbps bandwidth, however, the bandwidth is not evenly allocated to each computer. If one or more machines use a multi-threaded download tool to download files or play some online games with high bandwidth usage, therefore, it will occupy a lot of bandwidth, causing other computers to be too slow to access the Web page. If similar situations often occur, it is recommended that users in the network use a single thread to download or select a low-density time to download.

3. The two computers were originally interconnected with NICs. Later, they connected the NICS of one of the computers to the broadband. Which methods can be used to connect the other computer to the broadband?

There are three main methods to solve the problem of shared Internet access: using a hub or vswitch, you can directly connect the broadband network connection to the hub or vswitch, and then using the network cards of the two computers to connect to the hub or vswitch respectively, you can use the shared software to share the bandwidth. Second, you can install another network card on the machine that has connected to the bandwidth to connect the network card of another computer, share the Internet through network sharing software. Once again, if you have sufficient funds, you can select a Broadband Router to connect the network cable of the Netcom broadband to the WAN port of the router, connect the two computer NICs to the lanport of the router, and configure the pppoe dial-up function of the router to enable independent Internet access on any computer.

4. How to ensure broadband Internet access network security

Many of my friends are worried that they will share broadband Internet access and their machines will be hacked. In fact, in general, the shared software is already powerful and generally has firewall functions, when the Internet is connected to a LAN, the LAN only has one valid IP address, and the Internet is connected to the shared server. Other computers in the system cannot access and therefore cannot be intruded. Therefore, compared with independent Internet access, Internet sharing greatly improves the security of computers, many broadband routers also have firewall functions, so the external connection is the vro itself. The vast majority of hackers cannot work after encountering a vro, so the security is higher, because the router itself is not afraid of attacks. Therefore, although you can rest assured, you will not be hacked.