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  • Thank you, one more question, if my router connects to the Internet through PPPoE then the default DNS server would be the ISP's right?
    – catmandx
    Commented Sep 22, 2020 at 8:35
  • I don't think it is directly connected with PPPoE. Your router acts as PPPoE client and DHCP server. If your router is ISP provided it is likely to be preconfigured to give out ISP DNS address to it's clients. Commented Sep 22, 2020 at 9:10
  • In my home network, my ISP-provided router itself functions both DHCP and DNS server, so DHCP configures the end computers to also use the router as DNS server (192.168.1.1). Presumably, the router's DNS service forwards to the ISP's server.
    – Jonathan
    Commented Sep 22, 2020 at 10:26