Skip to main content

DNS_Client_Resolver

DNS Client/Resolver​

The DNS client or /etc/resolv.conf file nameserver entries were created at configuration time.

Some utilities that can be used to change the behavior of the resolver:

  • /etc/resolv.conf - static file used to configure the resolver.
  • NIC (Network Interface Configuration)
  • DHCP Client - The DHCP server often provides nameserver information as part of the information sent to the DHCP client.
  • resolvconf Service - An Ubuntu service which uses additional files like /etc/resolvconf.conf and the service resolveconf.service to optimize contents of /etc/resolv.conf.
  • dnsmasq - Sets up a mini caching DNS server and may alter the resolver configuration to look at dnsmasq instead of the items listed in /etc/resolv.conf.
  • systemd.resolved.