Last Modified: Feb 03, 2026
Affected Product(s):
BIG-IP DNS, Install/Upgrade
Known Affected Versions:
17.1.3, 17.1.3.1, 17.5.1.3, 17.5.1.4
Fixed In:
21.0.0.1
Opened: Jun 09, 2025 Severity: 3-Major
All DNS PTR queries are forwarded to the configured forward zone. If any change is made to the local zones, such as adding a new local zone; the system begins responding to PTR queries with NXDOMAIN.
Queries respond with NXDOMAIN.
Occurs on BIG-IP DNS version 17.1.2 and above Triggered when changes are made to local zones
Restart tmm: bigstart restart tmm
None