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I am using systemd-networkd and systemd-resolved. I have /etc/resolv.conf being a symlink to /run/systemd/resolve/stub-resolv.conf as recommended.

I guess that /run/systemd/resolve/stub-resolv.conf must be auto-generated, so I would like to know if there is a way to add custom DNS options so the generated file includes them. I'm talking about options like this one: options single-request-reopen.

Vicente Olivert Riera
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  • I would never recommend a symlink over the real thing. Those could have use mostly for multi-version compatibility. My /etc/resolv.conf is my actual resolve. No pseudo-stuff involved. If there's a symlink involved, you will have to edit the actual target of that link. – Overmind Jul 07 '20 at 12:58
  • @Overmind Are you using systemd-resolved? – Michael Hampton Jul 07 '20 at 13:01
  • You should not need that option when using systemd-resolved. Actually you should never need that option, and if you do, you should instead fix or replace the offensive firewall hardware which caused the problem. – Michael Hampton Jul 07 '20 at 13:04
  • Hi @MichaelHampton, thanks for your comment. Could you please explain why I "should not need that option when using systemd-resolved"? – Vicente Olivert Riera Jul 07 '20 at 23:08
  • I think I ran into the same issue as @VincentOlivertRiera requiring that option due to slow DNS resolutions. It only took about a year to finally click that I needed to disable IPv6 (I don't use it on my network). After I did that DNS resolutions are working correctly without needing that option. – Natalie Adams Jul 09 '20 at 20:25
  • That libc option would not be useful, because it would only be used by requests from libc to the systemd stub resolver. The systemd resolver has completely other code and options. https://github.com/systemd/systemd/tree/master/src/resolve – Gerrit Jul 13 '20 at 15:08

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