Custon DNS on PPPoE or DNS Forwarding. What is a difference?

MT001 · November 15, 2021, 2:16pm

Hi guys! I have PPPoE from ISP configured using of custom DNS (Google DNS).

What difference between my current case and case when additionally I add dns forwarding to the Google DNS?
What difference between using of custom DNS with PPPoE and using DNS forwarding?
Which option is better?

eduperez · November 15, 2021, 2:27pm

You are using DNS forwarding, on both scenarios: since your router cannot resolve DNS requests itself, it has to forward the requests, either to the ISP servers, or to Google servers.

MT001 · November 15, 2021, 2:51pm

Thank you! So this is NO technical difference between both cases?

frollic · November 15, 2021, 2:55pm

No,

and theoretically, your ISP could forward all their requests to Google too

MT001 · November 15, 2021, 3:37pm

Why need single option for DNS forwarding in dnsmasq when we can use interface option for DNS customization? They are equals?

vgaetera · November 15, 2021, 4:03pm

DNS forwarding is typically used for more complicated setup:

Split DNS can solve race conditions when using DNS encryption or VPN.
Selective DNS forwarding can be used for DNS-based content filtering.