The tplink router prevents ISP hijacking of DNS and manually sets the DNS of the TP-link router.

I don't know where you are. There is an ISP bandwidth service provider named Dr. Peng in my location... At the beginning, the legendary telecom-plus Great Wall broadband dual-line service that the landlord said was used to attract the landlord's network. As a result, I have never encountered a telecom IP address. It has always been owned by Dr. Peng, called Great Wall Broadband. I want to go here ~~~
I always hijack my DNS, and the landlord uses a junk software router, which looks like a WayOS route... Various restrictions cannot be broken... Fortunately, my requirements are not very high. You can go to the webpage to see movies or anything. Then again, great wall broadband is widely known for its download speed. The download speed is indeed not bad. The landlord said that the bandwidth of 4 MB will usually exceed the actual speed of 1 MB. It seems that only the unscrupulous ISP can have this technology. (Do not fear copyright, distributed cache to intranet)
Well, let's talk about how TP-Link sets DNS manually instead of the DNS server automatically obtained by PPPOE dialing as the DNS resolution server of the client, of course. In this example, it does not apply to the corresponding CMCC wireless or web security authentication. Currently, https web page authentication is the most secure wireless network. This wireless connection still needs to be implemented through DNS.

In this way, you can probably get rid of isp hijacking of your DNS. However, this method is not very good, some are forced to listen to the client request Port 53 and hijack the client DNS... Therefore. Not the perfect solution. But few people have noticed this. Dns hijacking is nothing more than a pop-up window advertisement... It's awesome ~!