Shulou(Shulou.com)06/03 Report--

First, check the network

1.1 check whether the computer network cable is plugged in

If the network cable is not plugged in, it will show that it is not connected to the internet.

1.2 View IP address, subnet mask, ping gateway

1. View IP address and subnet mask

Example 1:

If the ip address obtained is an invalid address starting with 169, you cannot surf the Internet.

2.ping Gateway

If the ping gateway is not accessible, it will not be able to access the Internet normally.

Ping 192.168.80.1

1.3Test whether the ping Baidu is normal.

Ping www.baidu.com

Example 2:

If the computer can log in to QQ, but cannot open the web page, it indicates that the network connection is normal at this time. You can check whether the DNS setting is normal.

1.4 Test whether you can access the website

Telnet www.baidu.com 80

1. As shown below: telnet is not an internal command. You need to install the telnet client.

two。 Install the telnet client

Win+R key-input: appwiz.cpl-- mouse click to enable or disable the Windows feature

3. Check the telnet client, and then click OK

4. Enter the telnet command again, and only one cursor is displayed to indicate normal access

1.5 check whether the browser has specified the wrong proxy

If the above options are checked and found to be normal, and the browser still cannot surf the Internet, you can check to see if there is a proxy server that is set up incorrectly.

Second, check the firewall

2.1 check outbound rules in the firewall

Check whether the outbound rule prohibits the program from establishing a connection with the outside world. For example, the outbound rule set in the following figure: deny, which forbids Chrome browsers to surf the Internet.

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