Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP GTM, LTM
Known Affected Versions:
12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4
Fixed In:
12.1.0
Opened: Dec 08, 2015 Severity: 3-Major
DNS Rapid Response can occasionally crash.
TMM crashes
Running UDP listener with Rapid Response enabled in DNS profile and a default action of Drop.
Change default action to Allow, at the risk of slowdown.
Dropped packets no longer cause an occasional crash.