No more DNS resolution with stub resolver and systemd-resolve 255.4-2 on EndeavourOS/Arch about systemd

[rpigott]

I have done a basic script at reboot to modify stub-resolver:

Don't do that. It has a big warning at the top not to edit it...

[remyd1]

@rpigott yes, I know. As soon as there is another possibility, I will switch to it...

[rpigott]

Just configure sd-resolved with the files and api that sd-resolved has. The stub-resolv.conf is only present for compat with glibc — you don't want to edit it.

[bluca]

Modifying these files manually is not supported, as mentioned use the appropriate interfaces that are available to do this.

[remyd1]

FYI, I also did what you said, that is to say modifying /etc/systemd/resolved.conf instead of stub listener file directly.

It works with this basic configuration:

[Resolve]
# Some examples of DNS servers which may be used for DNS= and FallbackDNS=:
# Cloudflare: 1.1.1.1#cloudflare-dns.com 1.0.0.1#cloudflare-dns.com 2606:4700:4700::1111#cloudflare-dns.com 2606:4700:4700::1001#cloudflare-dns.com
# Google:     8.8.8.8#dns.google 8.8.4.4#dns.google 2001:4860:4860::8888#dns.google 2001:4860:4860::8844#dns.google
# Quad9:      9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
DNS=1.1.1.1
#FallbackDNS=1.1.1.1#cloudflare-dns.com 9.9.9.9#dns.quad9.net 8.8.8.8#dns.google 2606:4700:4700::1111#cloudflare-dns.com 2620:fe::9#dns.quad9.net 2001:4860:4860::8888#dns.google
FallbackDNS=9.9.9.9
#Domains=
#DNSSEC=no
#DNSOverTLS=no
#MulticastDNS=yes
#LLMNR=yes
#Cache=no
#CacheFromLocalhost=no
DNSStubListener=no
#DNSStubListenerExtra=
#ReadEtcHosts=yes
#ResolveUnicastSingleLabel=no
#StaleRetentionSec=

But if I change DNSStubListener=no , to DNSStubListener=yes and then restart systemd-resolved, it does not work anymore with the same issue as described above. I also tried udp and tcp for this option; it does not work either. Did I miss something ?