Simple and simple to achieve ADSL Internet sharing

Many users may have two computers. But there is only one ADSL connection. How can two hosts share the Internet at the same time? Next we will analyze how to complete sharing based on a netizen's question.

Q: I have bought a new notebook and want to share the Internet through a Broadband Router. the router prompts that the network is connected, and the two computers can ping each other. then, after I connect to the ADSL Modem directly with only one computer, the network becomes normal again. What is the problem?

A: The computer is directly connected to the ADSL Modem. Normal Internet access is allowed, indicating that the computer is normal. if the network is normal after the Broadband Router is connected, the possible damage can be ruled out. according to your description, the crux of this problem is probably that your local broadband operator has disabled multi-host internet access.

At present, China's Netcom or Telecom broadband has blocked multi-host internet sharing in some regions to ensure the interests of ISP (network operator) itself, because the blocking methods used by different cities or regions are different, therefore, the corresponding cracking methods have also changed. However, most of them adopt the MAC address detection mechanism, which usually locks the MAC address of the first computer Nic connected to the network, as the only valid Terminal to provide normal network connection services.

If the Internet is shared by ADSL, the router, as a network device, carries a MAC address. After it connects to the wired broadband, it occupies this "quota ", when other computers connected to the vro share the Internet, the local computer detects that the IP packets sent by the vro contain other illegal MAC address information, in this way, the local terminal will discard or close the detected IP data packets.

Tip: when the network adapter sends an IP packet or a packet of other network layer protocols, it will automatically split it and package it into a data frame with a maximum of 1518 bytes and a minimum of 64 bytes. the data frame includes the target MAC address, the source MAC address, the protocol type in the data packet, and a dword crc code.

In many cities, it is difficult to crack the rules that take effect permanently by binding a MAC address or changing the account or password during the dialing process, you must call to inform the network operator that the network card has been changed or use the sniffing software to detect the real account or password so that the correct dialing parameters can be set in the Broadband Router.

However, as you can see from your description, your city only uses the method of binding the MAC address of the dial-up host Nic, so you use the "special dialing" mode of the Broadband Router, all IP data packets sent by WAF can contain the unified MAC address information to break through the restrictions.

ADSL Internet sharing solution

Most broadband routers now support functions such as "MAC address cloning" and "host camouflage mode", which can convert a router into a single connected device, this breaks through the multi-host sharing restrictions for local hosts to bind MAC addresses.

Take the TP-LINK product as an example, after logging on to the management interface, click the "Network Parameters → MAC address clone" option in the left-side menu, and then go to the right window, the MAC address used by the router is "00-14-78-B6-47-5D ".

The MAC address used by the PC currently logged on to the vro is "00-11-85-1B-0D-0C". Just click "clone MAC address" (figure 1 ), the router can convert its MAC address to the MAC address of the currently logged on host, and the IP packet sent here contains the unique MAC address information, save the modification and you will be able to break through the multi-host sharing restrictions.

Click "clone MAC address ".

If this setting still does not work, you can select "host camouflage mode" under it, and save it to break through the multi-host sharing restrictions of broadband carriers. in addition, for China Telecom and China Netcom broadband in some regions, special dialing software and special character encryption accounts are used to restrict multi-host sharing. The Broadband Router also provides related functions. for example, the "dial-up mode" setting of this Broadband Router has the "special dial-up" function. It adds special characters to the bandwidth account (figure 2 ), special characters must be added to dial-up accounts in some regions.

"Dial-up mode" of the Broadband Router"

ADSL Internet sharing Summary

As network operators gradually improve their technology to limit multi-host sharing, some previous brute-force cracking methods have no effect. in this regard, the Broadband Router manufacturers are constantly carrying out corresponding cracking operations, so now friends who use the Broadband Router encounter multi-machine sharing restrictions, in addition to the corresponding cracking settings for the Broadband Router, you may wish to update the Fireware version of the device so that you can find a better Cracking Method in it, so that the multi-machine sharing can always be smooth.