Windows 7 DNS service cannot be resolved

2009/10/22 no response problem solution for the win7 route-based online DNS server since Saturday, it has been unable to access the lab network with win7, prompting that the DNS server has no response. At first, it took a day to reinstall the system because it was caused by computer viruses. Still unable to access the network. I ran the library for one afternoon. However, the network speed is too slow. So far, no updates have been completed, and many software has not been installed yet. Find a bunch of solutions online. The result is that you can ping the local IP address and the route address, and the DNS connection fails. Other methods have also been tried one by one. Now I have to switch to Ubuntu, and then use virtualbox to install an XP Virtual Machine, and then install vs2005 in it. Ah, this road is too tortuous. Which of the following experts can help solve this online problem?

[Source: Internet]

Statement1.

1. You can start-run and Enter cmd, And Then ping 127.0.0.1.

If the Ping is successful, the TCP/IP protocol is correct. If the ping fails, reload the TCP/IP protocol.

2. ping your own default gateway. You can enter ipconfig/all to view the ping command. If the ping command is successful, the route settings are correct.

3. the Network diagnosis says that the DNS server cannot be connected. This may be a problem with the school's DNS server. If other students can access the Internet, have you forgotten to change the DNS server to Automatic Retrieval? If other students cannot get in touch? the school told them there was a problem with the DNS server.

Statement2.(ARP Attack Status)

Solution 1 run the command ARP-D in the MS-DOS window to restore the internet.

Solution 2: first install the arpfirewall, and then delete the c: \ windows \ system32 \ npptools. dll system file.

Statement3.

In fact, it is basically because of the poor compatibility of the Vista system and the automatic identification function of some system programs.

In general, Vista computers can diagnose and diagnose Windows networks when they connect to the local network and the Internet normally. Therefore, they cannot communicate with DNS (server number, at the same time, there is a certain gap between the data packet sending and receiving .... at present, general computer maintenance personnel cannot solve the problem.

When the IP address is set to an automatically obtained status, the network status is sometimes the connection status. But sometimes it cannot connect ....

These problems seem similar to the fact that they can access the Internet in the first few days, but after a period of time they cannot connect to the Internet: when the computer shows "only local, check whether the problem has been fixed by Using Network diagnosis for diagnosis and repair? Re-set the IP address on the host when it is not running, and then manually set the IP address and other addresses on the computer. Then, check whether the IP address is connected...

Otherwise, you can call the after-sales maintenance personnel of the brand's computer to provide some guidance.

Statement4.

The system has considered more security issues. If your IP address is set to automatically retrieve, the IP address and related parameters are actually obtained from the DHCP server. However, this process may not be completed for some reason. in the SP1 era, in this case, the operating system sets 169 for the NIC to prevent network disconnection (written by Microsoft. x. x. the retained IP address of X, without any error message. If multiple computers do not obtain the correct IP address, they can also communicate with each other through the retained IP address.

However, after SP2 is installed, the operating system does not allocate any IP addresses based on the "Security" principle, cut off network connections, and reports the error "local connections are restricted or not connected ".

Generally, it is caused by the inability to bind IP addresses to the network card. Sometimes it can be solved, but it does not work in many cases. The reason is complicated and is generally caused by the network, it has nothing to do with the system or the computer itself. Now we will list the troubleshooting methods:

Method 1:

Open "Control Panel"> "network connection", find the current local connection, right-click it, and select "properties ", on the "General" tab, double-click "Internet Protocol (TCP/IP)", select "Use the following IP Address", and enter "192.168.0.1" in "ip address ", fill in "255.255.255.0" in "subnet mask". Do not fill in other information. Then click "OK" to solve the problem. (If the current computer joins a working group or domain, it must be set based on the situation)

Method 2:

You can remove the option "notify me when there is no connection" in the "local connection" setting of "network connection ".

Method 3:

Control Panel, management tools, and services

Set the DHCP Client Service in to automatic

Then start the service.

Method 4:

Enable Nic again

Method 5:

1. Install a software for what network express train or star speed (which is provided to you When you install ADSL in China Telecom, or downloaded online.

2. If you do not install the dial-up software, you can create a new dial-up connection. Try it yourself. There are not many forks...

Note: In my memory, it seems that I use ADSL to access the Internet. It is normal that the connection is restricted before I dial it. At this time, the IP address should be 169 ..... but as long as you dial it up, it will be normal ......

Method 6:

What is the case if the IP address starts with 169 (the connection is restricted )?

This is an IP address reserved by the Windows System for itself if no response is received after a request is sent to the DHCP server. That is to say, when your address starts with 169, it is because it is not successfully connected to the DHCP server. There are several possible reasons: the network cable is not properly connected, although the connection is successfully displayed physically, the data cannot run. The second reason is that the firewall hinders communication with the DHCP server. You can check firewall rules or disable the firewall. The third reason may be that the MAC address of the NIC on the host is 0. You can try to reinstall the NIC Driver. Fourth, if a dormitory encounters such a situation, check whether the main line of the dormitory is connected normally. The first is physical connection, that is, whether the switch light corresponding to the network cable connected to the wall port is on. The second is to check whether there is a problem with the switch. The simple method is to find a network cable and directly connect it to the computer from the wall to check whether the Internet can be accessed.

Here is a simple way to judge whether the problem is hardware or software. Manually specify the IP address of the computer that others in the same dormitory are using, if both the other party and the other party are in conflict, the reason is the software. Check whether the firewall and host settings, especially the DHCP service, are enabled. If no conflict is prompted, This is the hardware reason. Check the physical connection network card of the network cable, and so on.

Method 7:

Most of the reasons are that DHCP is not enabled on the routing device, and the default value of the system is to automatically obtain the IP address. In this way, when the IP address cannot be automatically obtained, the error message "local connection is restricted or there is no connection" appears. This may occur in both wired and wireless connections. The solution is to manually set an IP address for the computer. For how to set the IP address, subnet mask, and gateway, consult the network administrator.

1. The specific action is as follows:

Control Panel → network connection → local connection → properties → double-click "TCP/IP protocol ". Enter your address in "Use the following IP Address" and "use the following DSN server address". In general, enter the following content to solve the problem:

IP Address: 192.168.1.2

Subnet Mask: 255.255.255.0

Default Gateway: 192.168.1.1

DNS server (master): 202.102.192.68

DNS server (secondary): 202.102.199.68

2. solution. If the above settings are troublesome, it does not matter. You can remove the prompt without affecting the network.

The procedure is as follows:

Control Panel → network connection → local connection → properties → remove the hook above "notify me when this connection is restricted or cannot be connected.

Method 8:

First, check whether the network cable is connected from your telephone line to the cat, then to the router (if any), and then to the computer, the most important thing is that your crystal head is made by professionals (if there is a problem with the crystal head, it is too much trouble ). If no problem exists, uninstall your network card on your computer, and click again in the Device Manager. Refresh the page to detect hardware changes! Check whether your local connection is normal. If you still have an exclamation point, right-click the local connection and click Properties. Click TCP and IP to click Properties. Then, use the following IP Address:

Enter IP Address: 192.168.1.100

Subnet Mask: 255.255.255.0 Default Gateway: 192.168.1.1

Then, use the following DNS server address to enter: 202.101.103.55

Finally, let's try again on your local connection or surfing the Internet. If it doesn't work, you can change the network card again. It is very likely that your network card is broken by the motherboard integration.

 

 

 

Internet