Last Modified: Aug 19, 2026
Affected Product(s):
F5OS F5OS-A
Fixed In:
F5OS v2.0.0
Opened: Aug 22, 2025 Severity: 3-Major
When DNS server entries are added to the appliance via ConfD, the entry is not updated in /etc/resolv.conf of the system_host_config container. Outbound traffic from system_host_config will use stale DNS entries.
The new entry is not updated in the system_host_config container's /etc/resolv.conf file. This container does not generate outbound traffic so there is no functional impact.
A new DNS server or host-entries are added on appliances via ConfD.
If you need system_host_config to have the updated DNS server entries, restart the system_host_config container: docker restart system_host_config
Restarting the container should update the DNS lookup entries.