Uncover the mystery of Vista system in Netcom's broadband network

Zhoulei: My home Internet use of the ADSL Henan Netcom, from the Netcom customer service there know that the use of DHCP Internet access, with XP operating system has no problem with the Internet. However, when I replaced the operating system from XP to Vista, I found that the Internet can not be normal? I would like to ask the "computer" experts, how to solve this problem?

Office expert Chen Dun-wan: Through the reader's description we know that Vista operating system in Henan Netcom use, there is no internet phenomenon, after our test found that some parts of Henan Netcom use DHCP network, and the Vista operating system and the Henan netcom DHCP server Authentication has a certain conflict ( In fact, this phenomenon has been seen elsewhere.

After investigation, we found that some parts of Henan netcom use of dialing procedures by Beijing Run Technology Co., Ltd. was developed, the use of non-international standards of DHCP (modified IP authentication method), dialing procedures through the metropolitan Area Network in the beginning of the 10 Netcom address connected to a group of authentication servers, Certified server to return to the client, the client to obtain the real public network IP address.

Tip: DHCP is the acronym for Dynamic Host Configuration Protocol, which consists of a server side and a client. Standard DHCP provides two types of IP allocation: Automatic assignment is the first time a DHCP client successfully leases from a DHCP server to an IP address and always uses that address. Dynamic assignment is that the address cannot be used permanently after DHCP first leased it from the DHCP server to an IP address. The client releases the IP address as soon as the lease expires.

If you have a Vista system installed, you may not be able to access the network automatically allocated 10 of the initial address. In Windows XP SP2, the broadcast flag in the DHCP discovery packet is set to 0 (disabled). In Windows Vista, the broadcast flag in the DHCP Discovery packet is not disabled. As a result, some non-Microsoft DHCP servers may not be able to process DHCP discovery packets.

Tip: The broadcast flag means that the computer has the ability to broadcast packets to all hosts.

Solution

Method One: Crack the Software method

The easiest way is to use the old week to develop the crack software "Henan netcom ADSL Vista client" (software download Address: http://www.cpcw.com/bzsoft), after installation can be a key to solve the internet problem.

When installing, if a warning of UAC elevation permission is raised, select "Yes" and if "Connection failure" appears. Exception error "(Figure 1), then right-click on the desktop's Netcom broadband logon client, select the Properties command, and in the Pop-up Properties tab, switch to the Compatibility tab, and in the Compatibility mode box, check the" Run this program in compatibility Mode "and tick in the" Privilege Level "box. Run the program as an administrator, and then click OK.

Method Two: Registration Form modification Method

If you are familiar with the registry, click "Start → run" and enter "regedit" to open Registry Editor and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters The Dhcpconnforcebroadcastflag subkey (Figure 2) under \interfaces\{guid}, change its value from 1 to 0.

Tips: If there is no Dhcpconnforcebroadcastflag subkey, you can click "edit → New →dword (32-bit) value" to create a new one.

View

Henan Netcom ADSL In order to prohibit the use of routers, so only to use the DHCP authentication of the Internet, Vista operating system and the conflict can not be online, is unintentionally caused by the broadcast flag can only be set to disable to solve the problem. Where method two is suitable for users who are familiar with the registry, the average user is best to use method one, because the registry incorrectly destroys the system and causes the computer to become paralyzed.