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Is systemd-resolved needed?
This article is meant to dispel an internet myth that says systemd-resolved is pointless and isn’t doing you any good. systemd-resolved is almost guaranteed to be useful for any Linux device that accesses the internet and can optionally be configured to boost your privacy and security.
Does Ubuntu use systemd-resolved?
Ubuntu included systemd-resolved in version 16.10 and it’s now present in the current LTS version – 18.04. systemd-resolved provides local applications with an interface to the DNS. In addition to implementing a resolver, it adds several capabilities like DNS caching and DNSSEC validation.
How do I add nameserver to systemd-resolved?
In order to use custom dns instead of the local systemd-resolved cache, do the following:
- add new nameservers.
- cancel the actual symlink to /etc/resolv.
- create a new symlink sudo ln -s /run/systemd/resolve/resolv.
- restart the service sudo service systemd-resolved restart.
What is usr lib systemd-resolved?
systemd-resolved is a system service that provides network name resolution to local applications. It implements a caching and validating DNS/DNSSEC stub resolver, as well as an LLMNR and MulticastDNS resolver and responder.
Why does systemd-resolved not query DNS server for local domain?
I got the same problem on Ubuntu 18.04, which also use systemd-resolved for DNS. Its default configuration does not resolve single-label hostnames or .local domain hostnames by DNS, but by LLMNR or mDNS respectively.
How to configure systemd resolved and systemd networkd?
I would like to configure systemd-resolved and systemd-networkd so that lookup requests for local hostnames would be directed (routed) exclusively to local DNS server and lookup requests for all other hostnames would be directed exclusively to another, remote DNS server.
How to make local domain hostnames resolved by DNS?
To make local single-label hostnames or .local domain hostnames resolved by DNS, I enabled the 3rd of the “Four modes of handling /etc/resolv.conf” described in the man page for systemd-resolved.service: A similar answer was given here. And again, for the reasoning behind the default, see poettering’s reply in this bug report.
What’s the difference between stub resolver and DNS server?
As long as systemd-resolved is concerned, ‘stub-resolver’ doesn’t do all the DNS resolution on it’s own (i.e. it doesn’t connect to root DNS servers -> tld/gtld name servers -> authoritative name servers).