I am trying to use nslookup to query google.com with 2001:4860:4860::8888, which is google IPv6 DNS. But I get no response, eg connection. always times out.

When I try same procedure just as DNS put 8.8.8.8, which is IPv4 DNS, everything works fine.

What I am missing here?

PS. I am using mac

EDIT:

nslookup google.com 8.8.8.8

gives output

Non-authoritative answer:
Name: google.com
Address: 216.58.212.46

but

nslookup google.com 2001:4860:4860::8844

gives output

;; connection timed out; no servers could be reached

9

1 Answer

Ok I managed to solve this. It was due to lack of understanding how IPv4 and IPv6 networks function.

I was connected to IPv4 wifi. Trying to nslookup with 8.8.8.8 would obviously work. But trying to access IPv6 DNS from IPv4 network does not work.

If I switch to IPv6 wifi, nslookup with 2001:4860:4860::8844 DNS will yield correct results. Also if I try nslookup with 8.8.8.8 it will also work, since I can access IPv4 DNS from IPv6 network.

Your Answer

Sign up or log in

Sign up using Google Sign up using Facebook Sign up using Email and Password Submit

Post as a guest

Post Your Answer Discard

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy