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Accepted
Arseni Mourzenko
Asked: 2014-08-26 10:57:58 +0800 CST

Where does `resolvconf` gets the IPs of DNS servers from?

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On a server machine, I have the /etc/network/interfaces file similar to:

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
    address 192.168.1.35
    netmask 255.255.252.0 
    network 192.168.0.0
    broadcast 192.168.3.255
    gateway 192.168.1.1 
    dns-nameservers 192.168.1.3 192.168.1.4
    dns-search example.com

When running resolvconf -u, the /etc/resolv.conf file becomes:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.1.3
nameserver 192.168.1.4
search pelicandd.com
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.1.13

Why is there a nameserver 192.168.1.13?

networking

1 Answers

  1. Best Answer

    Resolvconf generates /etc/resolv.conf using files in /etc/resolvconf/resolv.conf.d/ in the order: head, base, tail. The head file is almost always present and contains just the warning message about generated files. The base file may also be present, but is empty by default. There might be a tail file, and this is likely the culprit in your case given that the rogue entry appears at the end.

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