Notes DNS - SystemD - systemd-resolved

Install cache DNS

mkdir /etc/systemd/resolved.conf.d/ chmod 755 /etc/systemd/resolved.conf.d/

Pour RedHat 9

dnf install systemd-resolved

/etc/systemd/resolved.conf.d/dns_servers.conf

[Resolve] DNS=8.8.8.8 8.8.4.4 Domains=acme.local dev.local FallbackDNS= # Work on RedHat 9. Before 'no-negative' is ignored, Default is 'yes' Cache=no-negative #StaleRetentionSec=SECONDS # Fix bug 10 seconds timeout shortname resolution. Ex : '/usr/bin/host plop' LLMNR=no # Useless / not yet used MulticastDNS=no DNSSEC=no DNSOverTLS=no
chmod 644 /etc/systemd/resolved.conf.d/dns_servers.conf sysctemctl enable --now systemd-resolved.service cp -p /etc/resolv.conf /etc/resolv.conf.bak ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
systemctl status systemd-resolved resolvectl statistics