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Assessment Title
Rule Text
RHEL 9 must configure a DNS processing mode in Network Manager.
Description
Discussion Text
To ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured. The following are common DNS values in NetworkManager.conf [main]:
- default: NetworkManager will update /etc/resolv.conf to reflect the nameservers provided by currently active connections.
- none: NetworkManager will not modify /etc/resolv.conf. Used when DNS is managed manually or by another service.
- systemd-resolved: Uses systemd-resolved to manage DNS.
- dnsmasq: Enables the internal dnsmasq plugin.
- default: NetworkManager will update /etc/resolv.conf to reflect the nameservers provided by currently active connections.
- none: NetworkManager will not modify /etc/resolv.conf. Used when DNS is managed manually or by another service.
- systemd-resolved: Uses systemd-resolved to manage DNS.
- dnsmasq: Enables the internal dnsmasq plugin.
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