resolv.conf take a localhost as DNS

Question

When read /etc/resolv.conf:

me@alpha:~$ cat /etc/resolv.conf | tail -3                                                                                
# operation for /etc/resolv.conf.

nameserver 127.0.0.53

I got the idea of DNS from The Internet: IP Addresses & DNS - YouTube and aware that DNS is Google Public DNS - Wikipedia

How could the default namesever is a localhost address? I guess it impossible accessing to external services.

Name resolution is not based on /etc/resolv.conf only. That file is part of a dynamic system, the details of which depend on the exact version of Ubuntu that you use. See for example What is the proper way to change the DNS IP?. Other questions on AU also refer to the same theme. — Marc Vanhoomissen, Jan 18 '19 at 09:02

score 8 · Accepted Answer · edited Dec 12 '23 at 17:16

8

In recent Ubuntu releases, domain name resolution is handled by systemd-resolved, and 127.0.0.53 is only a stub listener created by systemd-resolved. You can find out the actual DNS server that handles DNS queries by using the command

$ systemd-resolve --status

Look for the line that starts with DNS Servers.

You can learn more about systemd-resolved from its manpage.

edited Dec 12 '23 at 17:16

winne2

103

answered Jan 18 '19 at 08:59

Anthony Wong

921
6
20

Alternatively you can check the service logs with: systemctl status systemd-resolved – MOnsDaR Dec 13 '23 at 10:26

resolv.conf take a localhost as DNS

1 Answers1