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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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You can't. Well, you shouldn't rely on queries going out in any particular order. All of your DNS servers should behave the same way as clients may fail from the first one to a secondary.
Why do you care which one is being used? What are you trying to do?
I want to have ads blocked with pihole and at the same time to have local DNS served by the router. I know pihole does local DNS, but RouterOS (mikrotik) is much better suited for that.
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Thank you. I'll have it set like this.
Via ChatGPT 4 (accuracy unverified):
Yes, you can configure systemd-resolved
to use the DNS servers in the order provided without dynamically switching based on speed. Here’s how you can do it:
-
Edit the resolved configuration file:
Open the
resolved.conf
file in a text editor:sudo nano /etc/systemd/resolved.conf
-
Modify or add the following line:
DNS=`IP_of_pihole` `IP_of_mikrotik` DNSStubListener=no FallbackDNS=
Replace
IP_of_pihole
andIP_of_mikrotik
with your actual DNS IP addresses. This tellssystemd-resolved
to only use the DNS servers in the order you've specified. -
Prevent automatic DNS changes by network manager:
If you're using NetworkManager, create a drop-in configuration to prevent it from overriding DNS settings:
sudo mkdir -p /etc/NetworkManager/conf.d/ sudo nano /etc/NetworkManager/conf.d/dns.conf
Add the following content:
[main] dns=none
-
Restart services:
After making these changes, restart
systemd-resolved
andNetworkManager
:sudo systemctl restart systemd-resolved sudo systemctl restart NetworkManager
This should ensure that your system uses the DNS servers in the order provided without any automatic switching.