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20.04, netplan: no reverse lookups with traceroute

By Emma Valentine

I'm running an Ubuntu 20.04 server and if I do a traceroute to a server in my DMZ or the internet, I only see IPs.
But if I do an nslookup for those IPs I get hostnames, but it says that Authoritative answers can be found from: and then nothing. Even though /etc/netplan/00-installer-config.yaml points to the proper, authoritative, servers.

What am I doing wrong here?

Edit: I just noticed that traceroute6 displays proper hostnames while nslookup bevaves the same for IPv6.

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