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87 votes
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How to configure systemd-resolved and systemd-networkd to use local DNS server for resolving local domains and remote DNS server for remote domains?

In the configuration file for local network interface (a file matching the name pattern /etc/systemd/network/*.network) we have to either specify we want to obtain local DNS server address from DHCP ...
Piotr Dobrogost's user avatar
47 votes

Override Ubuntu 20.04 DNS using systemd-resolved

Update /etc/systemd/resolved.conf [Resolve] DNS=1.1.1.1 8.8.8.8 FallbackDNS=8.8.4.4 Restart system resolved: service systemd-resolved restart Run systemd-resolve --status (or resolvectl status in ...
Tombart's user avatar
  • 2,870
23 votes

How to configure systemd-resolved for mdns multicast dns on local network?

This is a late answer but I still think that can help someone because there are few infos on this topic. I also wasted time on this problem. Changing the /etc/systemd/resolved.conf is just a part of ...
ozw1z5rd's user avatar
  • 331
21 votes

What are DNS server, resolver and stub resolver?

Confusing names that people often get wrong. In the terminology of RFC 1034, there are "resolvers" and there are "name servers". "resolver" describes the entire subsystem ...
JdeBP's user avatar
  • 69.2k
20 votes
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What is the difference between resolvconf, systemd-resolve, and avahi?

When you run a command such as ping foobar the system needs to work out how to convert foobar to an ip address. Typically the first place it looks is /etc/nsswitch.conf. This might have a line such as:...
Stephen Harris's user avatar
18 votes

What's the difference between /run/systemd/resolve/stub-resolv.conf and /run/systemd/resolve/resolv.conf?

Using resolv.conf instead of stub-resolv.conf will bypass a lot of systemd-resolved configuration, such as DNS answer caching, per-interface DNS configuration, DNSSec enforcement, etc. Explanations: ...
duthils's user avatar
  • 426
15 votes

How to allow systemd-resolved to listen to an interface other than loopback?

You can't. As cristian-rodríguez mentioned above, it was strictly designed to provide services to loopback only. Not even an alternative solution using net.ipv4.conf.all.route_localnet=1 + iptables ...
Pcgomes's user avatar
  • 159
14 votes
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DNS broken when using ifupdown and systemd-resolved after upgrade to Ubuntu 22.04

I bumped my Ubuntu server 18.04->22.04 and ran into this issue. As you clearly stated (thank you!) updating /etc/network/if-up.d/resolved and removing 2 quoted variables in such a way: sudo vim /...
Tom's user avatar
  • 266
13 votes

How to allow systemd-resolved to listen to an interface other than loopback?

Exactly the desired configuration of listen-addresses is freely possible since systemd-resolved version 247 (commit 1f05101f and follow-ups) by setting DNSStubListenerExtra. Address, port, and ...
Klaus's user avatar
  • 231
13 votes

How to allow systemd-resolved to listen to an interface other than loopback?

Resolved is not intended nor designed for your use-case, but to provide services in the local loopback, thus the listen address is hardcoded.
Cristian Rodríguez's user avatar
13 votes
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Why is my stub-resolve.conf missing?

Sorry, i am late to the party, but maybe this will help others. I had the same problem, and actually, the /run/systemd/resolv directory was missing. Then I realized that systemd-resolved.service was ...
kiwo's user avatar
  • 169
12 votes
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Why doesn't systemd-resolved use my local DNS server?

So, changing my wired eth0 interface to be managed solved this issue for me. Changing ifupdown to managed=true in /etc/NetworkManager/NetworkManager.conf [ifupdown] managed=true Then restart ...
Civing's user avatar
  • 409
10 votes

How to make systemd-resolved stop trying to use offline DNS servers?

DNS professionals have known for long that if you want DNS service resiliency in any network, you do not leave that decision up to the client implementation. It is a too important decision, to leave ...
Rui F Ribeiro's user avatar
10 votes

How to correctly disable systemd-resolved on port 53 for avoiding clash with dnsmasq in Ubuntu 20.04…?

By default, systemd-resolved provides a "validating DNS/DNSSEC stub resolver" on "IP address 127.0.0.53", port 53. You can verify this: $ sudo netstat -tulpn | grep LISTEN tcp ...
mainmachine's user avatar
9 votes

Why doesn't systemd-resolved use my local DNS server?

My guess is that your systemd-resolved service is configured correctly, but it never gets to see the request. The .local domain is treated specially by systems running mDNS. avahi-daemon, which ...
ErikF's user avatar
  • 4,087
8 votes

How to configure systemd-resolved for mdns multicast dns on local network?

I spent a lot of time trying to get system-resolve working persistently after reboot, but couldn't get it to work to great frustration. The steps I took as per instructions and comments above: Set ...
nidkil's user avatar
  • 181
8 votes

Override Ubuntu 20.04 DNS using systemd-resolved

This comment from @David R was very helpful: rm -f /etc/resolv.conf ln -sv /run/systemd/resolve/resolv.conf /etc/resolv.conf
leodotcloud's user avatar
7 votes

How to configure systemd-resolved for mdns multicast dns on local network?

In order to enable mDNS on an interface, you need to set the MulticastDNS= option in the [Network] section of the .network file for the interface in the 10.0.0.0/16 network. This option defaults to ...
filbranden's user avatar
  • 21.8k
7 votes

How to configure systemd-resolved and systemd-networkd to use local DNS server for resolving local domains and remote DNS server for remote domains?

Just to expand on @piotrDobrogost 's excellent answer, don't forget to config /etc/nsswitch.conf to use systemd-resolved as a DNS resolution source. Your hosts directive should look as follows for ...
F1Linux's user avatar
  • 2,534
6 votes

What is the recommended way to set a global DNS server override on a system using systemd-resolved?

I don't think there's a recommended way, but here are a few options. Disclaimer: all of this was tested on an Ubuntu 20.04 system, there may be some differences on other versions. Manual /etc/resolv....
GnP's user avatar
  • 2,355
5 votes
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dnsmasq & systemd Causing Intermittent CPU Spikes

It looks like you may have dnsmasq process in 127.0.0.1 and systemd-resolved process in 127.0.0.53 passing queries back and forth between each other, causing a loop. Even dnsmasq alone might be ...
telcoM's user avatar
  • 98.1k
5 votes

What are DNS server, resolver and stub resolver?

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 ...
Tejas Sarade's user avatar
5 votes

What is the recommended way to set a global DNS server override on a system using systemd-resolved?

I miss the days when was easy to manage nameservers, just editing /etc/resolv.conf. While this actually still works, now distros like Ubuntu add services that symlink and manage /etc/resolv.conf ...
ton's user avatar
  • 381
5 votes
Accepted

How do you remove bad DNS server IPs from systemd-resolved?

After some investigation and a systemd bug report, here is what I discovered. systemd-resolved gets all its DNS information from systemd-networkd, so focus on systemd-networkd as fixing the rogue ...
Malvineous's user avatar
  • 6,923
5 votes

Override Ubuntu 20.04 DNS using systemd-resolved

Let the iface variable contain your main interface name, then you can set your DNS addresses this way : $ sudo resolvectl dns $iface x.y.z.t1 x.y.z.t2 $ sudo resolvectl domain $iface "myDomain....
SebMa's user avatar
  • 2,189
5 votes
Accepted

systemd-resolved+VPN: 2nd DNS server ignored (L2TP)

You may be able to achieve split DNS (conditional forwarding) with the following configuration (assuming ppp0 is your VPN interface and enp6s0 your regular LAN): resolvectl dns ppp0 corp.ip.add.ress ...
bbc's user avatar
  • 1,891
5 votes
Accepted

systemd-resolved as mDNS responder

The capability of using mDNS should be enabled in the /etc/systemd/resolved.conf file, in the [Resolve] section, by setting MulticastDNS=yes. Moreover, it should be enabled in the [Network] section of ...
ArenaLor's user avatar
  • 181
4 votes
Accepted

systemd version 219 from CentOS 7 listening on random UDP port

As I mentioned in a comment to the question, I ran systemd-resolved in strace, while watch[ing] netstat -tunlp. I noticed that the port is only opened once I make the first request to resolve a DNS ...
Peter Andersson's user avatar
4 votes

How to configure systemd-resolved and systemd-networkd to use local DNS server for resolving local domains and remote DNS server for remote domains?

If you are doing this because you have an connection configured with OpenVPN, you need to use https://github.com/jonathanio/update-systemd-resolved as per https://wiki.archlinux.org/index.php/OpenVPN#...
dols's user avatar
  • 151

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