How to check if the DNS of Win7 system computer is hijacked?

DNS, also known as the Domain Name System, is a distributed database on the Internet that maps domain names and IP addresses to each other. In the process of surfing the Internet, sometimes the DNS is hijacked. This behavior usually occurs without our knowledge. So how do we check whether the DNS of the Win7 system computer is hijacked?

First, how to see if the computer DNS is hijacked

1. Right click on the network icon in the lower right corner of the desktop of the computer, in the pop-up options, click “Open Network and Sharing Center ”, as shown below.

2, in the open network and sharing center, click on the network name that has been connected, then open the network status, and then click "properties" under the network status, as shown below.

3, in the pop-up network properties dialog box, first select "Internet version protocol 4 (TCP /IPv4) & rdquo;, then click on the "Attributes" below, as shown below.

4, finally you can see the DNS address set by the computer, if you have not set it before, the default is automatically obtained (such as the left picture), if the computer DNS address is set before, but here is displayed It is a strange DNS address set manually, which indicates that the computer's DNS address has been tampered with (as shown in the right figure below).

If you confirm that your computer's DNS address has been tampered with, you can change it to automatic acquisition, and then click “OK" at the bottom to save.

Second, how to see if the router DNS is hijacked

In addition to the computer DNS may be tampered with, the router DNS is also easily hacked by hackers, the following TP-Link router as an example, teach you How to check if the router DNS has been tampered with.

1, first open the router login address 192.168.1.1 in the browser (the default address of different brands of routers may also be different), and then use the administrator account login, as shown below;

2 After logging in to the router's background management interface, click to enter the “Network Port” setting under [Network Parameters], set the right interface on the WAN port, and click “Advanced Settings” at the bottom, as shown below.

3, in the open PPPoE advanced settings interface, you can see the router's default DNS address, as shown below.

If the DNS settings are the same as the computer settings, and this is not your own previously set DNS address, then your router DNS is hijacked, as shown below.

If the DNS address of the router has been tampered with, it is recommended to set it immediately. The hook in front of the DNS server will be manually set to be automatically obtained, and the router password will be changed. After the router is completed, the router will be restarted.

The consequences of DNS hijacking may be very serious, because the DNS will be directed to some dangerous addresses provided by hackers after the computer DNS is hijacked, which may lead to the disclosure of information such as users' online banking, when users are shopping or paying. Will be transferred to the phishing website. Therefore, we must remind everyone to pay more attention when you go online.